440cc Murray Goes Full Send and FLIPS!

We install a new driver clutch on our 440cc Kawasaki Arctic Cat snowmobile engine and take the Murray Kilowatt for a ride! This 2 stroke go kart isn't blindingly fast, but it's definitely quick. The off road go kart was fast enough to flip when I went into a turn too fast! We still have a few kinks to work out, including the exhaust and gearing.
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[@eriknulty6392]

keep all hands and FEET in the vehicle at all times.

[@edmawhinney3564]

Right!

[@whatcouldgowrong6224]

I saw that too that could of gone a lot worse the roll bar was close

[@CarsandCameras]

Me: it's slow! 10 mins later me: *flips*

[@Mitchs]

hi!

[@scooby3715]

CarsandCameras yee yee

[@snail7888]

Didnt flip it. You just put it on its side.

[@kimcook8442]

Set of ngk br9es or ngk br8es somewhere around .16 gap, my rotax motor will run fine up to 4500 rpm an fall on its face if it has one fouled plug, pull a plug wire off see which one kills the engine an go from there, also they like stock exhaust set ups

[@sethcude]

Carsandcamras👍👍

[@TravisFabel]

So waaaaay back in the day, when the briggs and stratton 5hp engine was the norm for a kart, I had a simple kart. Next to our house was a dirt road. I would go down the road, pitch the kart sideways into a powerslide, and go back up the road and do the same by the house. Over and over. lap after lap.. until one time.. just like you did there, it caught the edge of the tire and tipped. I also laughed and pushed it back up. Except the Briggs had the fuel tank on the motor. some fuel came out, touched the muffler.... pooft! kart on fire! Sprint back up the road.. whole time thinking, where is a fire extingusher?! Remember my dads boat has one. Jump up in his boat, grab it.... sprint back to the still burning kart.. and PUSSSSHTT put it out. Did the push of shame back to the house.... 1 carb rebuild later (burned out all the plastic parts including the choke, intake box, etc) and it was good as new.

[@bladerunner198306]

lol @push of shame. man do I know that one. But Oh the memories, and the learning of physics and such the fun way. Good story, took me right back to an old dirt road with a Briggs singing its tune.. the 5hp that was always fast enough to tear something up, get you to a great adventure, or just feel the pure freedom that came from just a few sips of the big red jug. All depending on how deep you were gonna bury the throttle that day. Anything to do with a yard cart, even the push of shame.. is still a good time.

[@funnerthanbefore4947]

ahh the good ole days of quality over quantity...

[@williamstamper442]

Fires are scary. We laugh at them on youtube. Once you have one of your very own its not so funny. I like the stock predator tank. Its way less likely to spill fuel all over when upside down. I like the dirtbike vents that have the check ball in them. And i like a good tight gasketed fuel cap. Yes i hate running out of vent when the power is wicked up and not enough vent. But i hate fires more. Also i like exhaust wrap. Alot. For leg burns and also less likely to light off from raw fuel on hot pipes.

[@Halliday7895]

damn im glad mine didnt set on fire when i flipped mine when i was 13 ...i had no means to put out a fire hahah i was lucky i guess.

[@bladerunner198306]

well, we all had a fire extinguisher built right in.. Just didnt think of it at the moment. lol

[@Sithhy]

The positive camber on the front is mad

[@shawnhurley3815]

Sithhy. 100% it's a wonder it can turn at all with that outrageous camber. Needs to be addressed asap.

[@martin2520]

@@shawnhurley3815 , thats the 1st thing that i noticed and probably led to the flipping of it lol

[@1986Honda4trax]

They probably have noticed it and will hopefully address this

[@Michigangminibikes]

No shit you’re right

[@bryanroupe8646]

That is probably the main factor in his flipping it. The tire is literally biting the ground and throwing the weight of the cart right over top of it if that makes sense. Kind of like when your running and your knee locks up.

[@DeathMechanic91]

Play with the torque converter weights 👍

[@jonathangottschalk7795]

yea they put on a completely different primary clutch and expect it to work just cause it fits onto the shaft

[@doomman700]

I doubt that is the key. I would start with spring. If it’s building heat I would add weight but it’s not. It’s boggy because it’s got too much weight. So if it has a 200-320 spring in it. I would go up to say a 275-400 and see. That will gain you rpm across the entire range, remember the weights are fighting spring pressure. More here holds the weights longer. If you have not , I strongly suggest Olav Aaen clutch tuning handbook as reading. It will get you where you need to be trying to tune cvts

[@tylercapece138]

It's not revving high enough, those old 2 strokes should scream.

[@Axys-nn5ti]

It should !! It's all in the clutching

[@randallyoung6647]

Yes they were I've built 2 stroke big just enough to keep the sleeves from blowing through the aluminum jugs I've blowed a lot up and found horse power from unexpected places and had a lot of fun 😂

[@salmonisyummiyeet163]

Woah, you made the thing run on Gatorade!

[@Michigangminibikes]

Honestly thought that for a sec and it was red so I thought it was the strawberry flavor

[@blkicemike4857]

I thought dudes leg was broke, when he put his foot down tryna catch himself! Maybe look in to wider stance for front-end, hell all around even,.. problem solved. i could watch these builds all day man!! That kross-kart is wicked-sweet!

[@EpicFallDown]

2stroke is very picky about an exhaust i'm saying change the exhaust!

[@marcruales8050]

EpicFallDown also the carb is crap.change it

[@stykytte]

I think by this point, with us commenting on every. damn. video. with exactly what is wrong with it.. I fell it's safe to say they aren't listening.

[@SHSPVR]

It really depend on what after but yes they can be a bit picky

[@SHSPVR]

@@marcruales8050 there nothing wrong with that carb keep in mind running a 2-stroke rich can also causes more problem and one is poor power output after they setup for winter use

[@broo_shs]

@@stykytte ive notis same

[@matthewschultz8462]

that stormtropper is one of the sickest karts on youtube

[@isaacitllbefine7231]

thanks

[@dirtbikeman2436]

No wonder its flipping awesome look at that camber

[@kcav5374]

I kept wondering about that and while I can't say for sure but I'm not liking that lean angle on the front tires

[@coreysmith2774]

Notice the lack of an upper control arm. The spindle is fixed solid to the single control arm, thus giving it the suspension characteristics of a Ford twin I beam.

[@HotrodHud]

So im still sorta new ro your chanel ive been watching for a month but you guys inspired me to fix one of my old gokarts (i have 3) so my dad bought me a new engine we have been working on all thanks to you guys inspiring me

[@mikebecker5303]

Been riding sleds since a kid....growing up in Minnesota... . Run 50:1 and jet the carb... ... snowmobiles are jetted to run in 30 degrees or colder.....makes a huge difference.....Mike

[@mopedmessiah]

It does sound kinda rich maybe, like it's not wanting to go full cause its flooding itself

[@bryduhbikeguy]

Never,EVER stick an arm or leg out when Rolling over ! You came so close to having it snap your leg.That is why nets are required for racing ! Please !?!

[@Tooawesome693]

Yeah I saw that too. My eyes went wide and everything

[@dominickpena1392]

Yep broke my left arm near my wrist due to reaching out and trying to catch myself and roll bar landed on it while flipping (no seat belt either)

[@aveoxus1139]

No one plans to roll, but yeah race netting saves limbs from getting places they shouldn't

[@alasdair4161]

I followed a guy in an Odyssey who flipped it, snapped his arm like a twig. He had opted not to use wrist restraints but we all used them every time from then on.

[@jonnychooch6624]

lucky it was at low speed, got crossed up and high sided , thankfully no major injury.

[@philtripe]

clearly John's head is heavier thus causing the roll

[@shawntl]

Looks like a blast have a great thanks giving

[@rylanwhite6955]

That thing is awesome y'all build some pretty cool stuff I've been watching since before the rat rod wagon

[@isaacitllbefine7231]

thanks

[@johngeorge5285]

Wow! You came close to breaking your leg when you rolled. ALWAYS keep your arms & legs inside at all times. Might not be a bad idea to buckle up on every ride. Those carts look like lots of fun .

[@gregharding7364]

The Fast and Furious references to the oil was a nice touch 😂

[@funnerthanbefore4947]

The two different gaped plugs are probably for the higher/colder climates and seemed to spin up the engine faster than the ones you guys put in.. in my opinion they should probably stay the same just replaced with new ones... Also the exhaust on a 2stroke engine is tuned for the back pressure and the exhaust gasses needed to make the engine run properly, and at peak performance. those factors put together is why its not beating the cross kart on the CAC GP. Thats also probably why the gearing seems sluggish. just my opinion.

[@budgetbuildz4191]

I see that 2 stroke minibike in the background 😏😏

[@MegaKencam]

When flipping always remember to stick your foot out the side to keep it upright...

[@salmonisyummiyeet163]

Kent Campbell watch it, there’s little kids watching who will actually do this

[@nordic5490]

@m cotton wool is bad, we don't want a generation of snow flakes.

[@nordic5490]

@m and with a name like yours I would expect that kind of reply. I am going to guess that you are American, as the entire rest of th world knows the US education system is substandard and you appear to be a product of it. Try a bit harder mate.

[@norm1233]

@@nordic5490 whatever shit box country your from I'd be embarrassed calling people mate.... Its the same as calling them a match.

[@overyonderjustapiece]

m he panicked as he was about to crash, calm your ass down a bit man..

[@acurarl9929]

Being a sled engine an it not being winter I’d definitely say the coldest plug is definitely 100% the way to go

[@acurarl9929]

Fourstrokekiller 69 this is old thread but I’m sure I was referring to that he said he was running 7s or questioning plug heat rang or something. I’m a professional and not bout to be schooled on wat plug heat ranges do. Lol

[@acurarl9929]

Fourstrokekiller 69 if the plug don’t get rid of the heat fast enough then the plug itself will run hot. The tip. Causeing pre ignition and ping also creating lots of excessive heat In Turn hotter engine. But I’m sure you already knew that

[@bigkev0350]

It’s always entertaining with you guys. Can’t wait to see how big you get. You make the perfect team together stick with it mate.

[@OogaBooga-qs8ns]

They got big

[@noahpaulette1490]

That 32 to one looks scary in that gatorade bottle because it pretty much looks exactly like Gatorade 😂

[@99milesaway41]

What I was thinking 😂😂

[@CrackD5]

I haven’t watched every video but so far this is the cooolest race I have ever seen on this channel. (The race between the Murray and the cross kart)

[@jansenhobbs2214]

Loved the faf reference

[@justgrayyy105]

How have I not seen this yet?? I love the Murray!!

[@NastyMoto]

Toooo much raw 2 stroke power 👊🏼✊🏼✊🏼✊🏼

[@blackwolfpowersports9393]

Except they have done almost everything you can to reduce 2 stroke performance, that 440 should be revving waaaay higher

[@Cee64E]

The "plateau" in the Kawasaki 440 is real. They used to do the same thing when I ran them at Malibu Grand Prix. Same engine, looks like the same clutch, though we ran a 32mm Mikuni carb and a can exhaust. That plateau is the engine trying to wind up the clutch. The clutch you have on there is for a much heavier vehicle than the Murray, an Arctic Cat Sled. (By comparison the 'Virage' race car at MGP was 700lbs dry and usually carried 22 gallons of fuel) So you can either re-gear the secondary, or put different springs in your drive clutch that let it start spooling in sooner, and tighten up the belt for a lower "stall" rpm when it engages. I think I would actually try the latter first. Changing springs in the clutch is easier than redesigning your whole drive train.

[@TerminusVox]

Yup, I'm claiming a point for recommending mufflers on the Cross Cart.

[@MrGixxer1300r]

I recommended the twin carbs, a four into two exhaust with muflers as well. These guys couldn't tune a radio better yet a engine

[@robsorgdrager8477]

You and like a thousand other viewers 😌

[@SportbikerNZ]

@@MrGixxer1300r Wow, what a toxic drama queen you are.

[@yogurtcast1]

Cross kart is the coolest project to date from you guys.

[@ericstevenson3738]

May be a combination of things. Exhaust, carb, plugs, gearing? I am not a 2 stroke expert, but I know they are super picky about exhaust systems.

[@ryanwashenesky5044]

Snowmobiles are jetted richer for the cold weather. They run like crap in the summer time. Go down 2 jet sizes and it would run much better.

[@doomman700]

Clutching , the power bands are so narrow cvt tuning is critical. If it loads the engine to much it will never come come out of it and rpm.

[@ryanwashenesky5044]

@@doomman700 just because it's a 2 stroke doesn't mean the power band is ultra narrow. If it would push a snowmobile through knee high powder at 55 mph, a light kart is almost no load in comparison. These old sled motors are not spinning a ton of rpm, and make peak power around 6k.

[@doomman700]

Ryan Washenesky well consider I was around when they were racing 440 Kawasaki’s new, se ran mercs but had an invader. It was a liquid sled but it was factory 7800, tuned for 8200 because it had twin Aaen pipes. Now you point out less drag, yes cvt is a torque sensing unit and it needs to see proper loading. You want it to hit 6000 and creep upward. Don’t take my word call a clutching guru for help. I know nothing, I only put 3-4k miles a year on snowmobiles and have since the early 70’s. ✌️

[@wrenchg3954]

Played it awfully chill after the roll John. Dead giveaway your feeling it when automatically you sit down and act chill. Lol. We all remember Biffing it heavy and after trying to look cool. Those were the days

[@collinlaque964]

Loved the welder and music in sync, was that planned?

[@glennjones5349]

That CrossKart is so friggin cool.

[@GPMsEVproject]

From my little experience with two strokes back in the day, they rely heavily on the reflected reverse exhaust pulse created in the expansion chamber, which is why every cylinder has its own separate expansion chamber, your 2 into 1 (which is fine on a 4 stroke) will really mess with performance, put a couple of expansion chambers on that are the right size and I bet it will solve most of the probs.

[@71MercuryCoupe]

watching this is getting me excited for this summer, ive got a 2 stroke 440cc yamaha exciter engine from a snowmobile and its gonna go on an old gokart that ive had for years.

[@codykamminga9667]

I’d say its the torque Converter, in my opinion it always feels slower with one of those

[@joshsrcs]

It really fast off the line So it’s torque while sacrificing Speed

[@ericroisland9635]

They moved the engine forward, So they put slack in the belt. Changing the engagement and speed

[@julesjan4019]

Snowmobiles have torque converter from the factory

[@julesjan4019]

What do you think a torque converter is

[@jonathangottschalk7795]

@@TUGG75 um.. no, where did you get that idea?

[@maxwinkles8894]

I love both those carts be proud my friends be proud good job guys

[@isaacitllbefine7231]

thanks

[@evanmcbride1400]

"We are going to K.I.S.S." (vidieo buffers) (me gets scared) " keep it simple stupid" (me ohhh thank god)

[@williamsmith2804]

That looks like fun! Thanks for the ride............ John, I hope your father does not see his yard for a while!

[@weeted3142]

The exhaust is completly wrong. Its not getting near the power band yet.It also needs rubber mounts or it will rattle its self to bits.

[@AdamHutcherson615]

“That’s flipping awesome”, no pun intended

[@emtiv5308]

I feel like calling someone a Jack shaft now!!

[@Ryl33hz]

OMFG the throwback to FnF at 7:11 absolutely killed me LOL thank you so much

[@mowler8042]

I guess your dad gave the thumbs up on not caring about the lawn LOL....

[@johnstutz4458]

I'm thinkin he is comin around.

[@tompetramanos2924]

For sure I think this video finally gave the cross kart a lil reference. Sick pass.

[@peterhellberg887]

Haha, love twostrokes! I think you should change the gearing. A twostroke wakes at high rpm and when the power kicks in, your cvt should attack :) Thank you guys for brightning up my mondays and wednesdays!

[@SquareGoated]

Literally FLIPPING cool

[@slamboy66]

after seeing that I went back and watched Ike flip the 670 mower.

[@isaacitllbefine7231]

you just like watching me get hurt.

[@slamboy66]

@@isaacitllbefine7231 Na bro. But it would make best of reel. Like John vs bush and John vs WOT

[@kakytoo69]

Same

[@tebibyte2357]

@@isaacitllbefine7231 PLEASE ADDRESS POSITIVE CAMBER! THAYS WHY IT FLIPPED OVER!!!!

[@ThiccRicc]

@@tebibyte2357 positive*

[@outabody381]

At least you guys are having fun and I always get a good laugh

[@SchmityFPV]

The fast and the furious line 😂

[@greggoliver8262]

Ive tested a bunch of cart designs,built a few and wrecked allot and honestly,i think you guys did a pretty good job with building your cart with what you had.I can hardly wait until you decide to shoe horn that Ducatti motor into it.You guys would get better use from the motor because simply the cross cart is just the buggy for that motor,makes perfect sense.I know 100% that if you ran the Ducatti motor in the cross cart and matched it with a set of paddles along with the right gearing ,,,,ill just say this,youve never known how big of a adrenaline rush that would be.Yall bring that one to life and out at the dunes youll be pulling cat walks in that cross cart, now that will be impressive allong with the hits on the video of the buuld.Love the vids brother,good stuff.

[@isaacitllbefine7231]

thanks. it was fun to build

[@mybackhurts7020]

Was totally expecting a crash but still jumped when he did it

[@RetroAnachronist]

Before you mess with the Crosskart, take it to that high school dyno you went to before. If you can get it to hook up, it’d be great to see what kind of numbers it makes.

[@Perry-ck1hv]

Amsoil full synthetic 2-stroke mix 100 to 1 ratio 👍. Check it out

[@rocknrye9273]

You gotta mention Saber lol

[@austinmartin0612]

Loved that fast and furious reference. Awesome

[@localsonly-ju6fc]

keep your hands and feet inside the ride at all times

[@Zzeke]

I also grew up around these old arctic cat snowmobiles with Kawasaki engines. They definitely used to hit a power band and wind out pretty good. I know you guys are familiar with cold air intakes being that colder air is more dense. Like somebody mentioned I think that you are running rich because you don’t have cold air Running through the motor. Probably need to lean up the jetting. You can figure out how you’re running by running at different throttle positions like wide-open throttle and then just turn off the Killswitch. Take the plug out and look at the color that will tell you how your jetting is.... I think this was a good motor but some of those Kawasaki’s had a tendency to burn holes in the piston. And warmer weather you may want to consider a cooler plug. Always want to build a 440 go cart and you guys did it good job.

[@danmackintosh6325]

7:27 i was almost about to comment about your mixture being too oil rich, wasn't 100% sure you knew the symptoms but sounds like you're on it like a car bonnet (I'm English, gimme a break!)

[@jacobkent9813]

The storm trooper is is still cool and the Murray is kickin it dude y’all r doing great and remember ITLL BE FINE

[@HighDefBNG]

Lighter rollers in the variator should let it rev higher and 2 strokes love to rev, it's like turbo when they get up.

[@rydplrs71]

HighDef Gaming you mean lighter weights. Atleast in the generation the rollers are fixed weight, tuning only involves matching them.

[@laztheman0483]

And I love all your videos you guys inspired me too buy a mini and build it myself great vids 👍🏽

[@icondonnied]

You guys are already planning CrossCart 2.0, aren'tcha?

[@kylearruda1041]

You guys need to source and exhaust designed for that engine for it to perform correctly

[@2strokejunkie686]

Exactly not a one size fits all by any means, and 90° bend straight out the port is terrible for the function of a expansion chamber..

[@TnTravelers33]

Just changing the premix ratio won’t change your jetting enough to help. The needle clip position and jets will make a world of difference if the top end isn’t shot

[@snapfish89]

Yeah for a engine that's probably jetted for 32F or below. I'd say lower the needle, lean it up a bit. (GUESSING)

[@JamesDean-yo8wm]

yea i was thinking its in the carbs as well and my arctic cat 440s run dual carbs on both the regular and snopro fan variants. i was thinking they could pull a little more outta them swapping that single set up out for a dual set up and i was also a little concerned about the head gasket maybe leaking a bit it seems way under powered compared to what even my old 1996 z440 was and if im not mistaken they did reuse the head gaskets after checking out the inside of the engine but i couldnt remember which motor that was but can make a huge difference... no compression no power

[@TnTravelers33]

James Dean I’ve never fooled with any snowmobile two strokes but I know on all of my 250 2T dirtbikes when they’re running like that it can only be a few things... ruling out the ignition system(besides the plugs lol) or powervalve(not sure if these have them if they do then that could explain why it’s no throttle then all of the sudden) it’s got to be the compression or bad carb settings. Altitude probably doesn’t effect them so I’d start with factory settings and go from there. Should be 32:1 premix if they’re wanting a safe ratio and won’t be on the pipe all the time.

[@Toolingabout]

Nice fast and furious reference

[@slamboy66]

Sees notification, leaves current video mid stream. Screw them I have a C & C vid to watch and it says "FLIPS".

[@counter929]

Love the fast and furious reference

[@josephrichichi3116]

We need a go fund me to go towards that lawn getting fixed by a lawn care service lmao!

[@brenthernandez3632]

His rich daddy can fix it

[@happytorrentt4500]

I hope they bring this back with the new yard, would love to see the 440 with a better carb and proper expansion chambers/racing exhaust

[@seafire820]

good news for you!

[@westerndevil2597]

I think 2 cycle engine needs new carburetor new carburetor can always make a difference

[@buddersthepuunk]

If you have low in and high in carburetor adjustment leaning out until it just about quit smoking at an idle if you lose power that means that's your fuel is too rich trying to 50 to 1 mixture maybe better and if you can't get that smoke under control you may have a hurt engine also after a 5-10 minute run if your engine is below 200 degrees temperature you are too rich lean it up anything over 225 is starting to get hot

[@Loner410]

12:05 Most broken leg and foot

[@iannorton4463]

Oh, and definitely change the exhaust. A long time ago I used to use a company called Allspeed & micron for 250 - 750 two stroke applications 👌

[@codykamminga9667]

First, and I told you so

[@jasonGreenVw]

Two strokes really need a tuned exhaust for maximum horse power. I used to have a Yamaha YZ80 and when the exhaust broke it lost most of its power.

[@thefalkor7731]

uummm....compression? compression test that SOB

[@Halliday7895]

i remember flipping my Manco GoKart on grass in a soccer field....my parents were 200 yards away watching sitting by the car. I was maybe 13 years old and flipped over while going about 20mph with no seat belt. I was fine I had a cage and helmet and my head hit the foam covering the bars i hopped right out all at once and flipped it right side up before they could run over to me haha but my mom was so freaked out haha i was mildly freaked out but then bought a torque converter clutch and put a 10hp motor on it. Dad probably expected it and hopped it wouldnt flip haha good times.

[@Alfred..E..Neuman]

FIRST!!...YAHOO!!

[@MotoRiot]

Love the fast and furious bit!

[@geoffreyjones2000]

Last again

[@keithheiskell2389]

The right expansion Chambers for that is critical I don't know if you know how they work they work by impulses back to the motor which pushes the first puff of gas back into the cylinder so it doesn't waste it, so if you don't have the right expansion the impulses are wrong and you're not gaining nothing you are losing power and a lot of it, you need one for each cylinder

[@Nick-4]

Did no one get the fast and furious relation at 7: 10? Lol that was awesome guys!!!!!

[@mrbadmojoe]

Fast and Furious reference. Bonus points.

[@mrbadmojoe]

You should have said "That's not what I had in mind" after the wreck, like Vin Diesel said in the movie

[@darrellroeters4951]

Thanks for advertising Powersports

[@rfworkshopchannel114]

Sounds lean; you can tell by the sound the engine is making on deceleration where it has a group of "hits" but they are spaced apart. Using less oil in the fuel makes the mixture slightly richer as more fuel passes through the main jet which is why that helped.

[@Lkilkenny]

That intro was on point

[@vela505]

Dont change the exhaust. 2 strokes push the power band much higher in the rpm range and it will be dead lazy down low. 32 to 1 on the oil mix. And tune the carb to the power band not low speed. Gear change or shorter tire will probably help more than anything. Cheers have fun. !

[@donniefish6362]

I cannot believe you flip a go kart I'm glad you're doing all right keep making those videos Happy Thanksgiving

[@sethcude]

So awesome I love both of them.

[@michaelschlosser1194]

Had one of these things and it was a freaking blast. I was young at the time but if I had that KiloWatt still id turn it into a beast. Bent a couple shocks on rolls but the frame on those thing are sturdy.

[@lifewithron4466]

it’s flipping awesome what u said in the beginning

[@harryrenner4016]

That replacement primary clutch is a Comet 102C. those are pretty good primary clutches. Comet makes larger ones that one. if that one doesn't hold up. I always mix my fuel at 50:1 but that's on my snowmobiles. it might be different on a two stroke in warmer temperatures. it seems like it's to high geared. from what John said and it should launch much better.

[@michaelcameron8559]

Living in northern Canada, I grew up working on snow machines. Their 2 stroke engine power is very dependent on rpm. That’s why they have CTV drives. Most are tuned to provide max power at around 8000 rpm. A 45 hp engine running below 6000 rpm (this 440 seems to be spinning below that even) will only make a small fraction of its rated power. It’s all in the clutches... let that engine rev!

[@stuartmills5704]

Gotta add the fast and furious quote! Haha. Love the videos guys!!!

[@pkuudsk9927]

If you had crashed on any other surface you would be in a hospital having your leg put back together , foot/ arm restraints would be my first modification. 2 stroke tuning is an art and there are many good books about it ,,one can get for free from this old building called a libary , so I won't go on about it a lot. 30 yrs of playing with them one learns . The first thing I would check is the crank seals ,air leaking in will stop you from ever tuning it right. Just spray some wd 40 at them while it's running and see if it changes rpm. A engine this old I would be stunned if they don't leak. You will keep cracking exhaust if the whole thing is not mounted so it can move and flex. Yet ironically the manifold has to be mounted leak free for the first 2-3 inches. Sonic waves dictate this.. You have yet to play with the clutch weights , another imperfect world , to keep the engine running in it's optimum rev range , while trying to tune it for on off throttle response , you need the clutch to be in sync to keep the engine revving in it prime spot. Now in short 2 stroke motors don't like to be boged around ,they rather like to be revving at close to wide open all the time. When your looking at mixtures oil/fuel consider how long will it be at idle vs WOT vs cruising. Keeping in mind the engine is inefficient of burning the oil at low rpm. This causes oil to build up and foul spark plugs , build up behind rings , make hot spots in the cylinder leading to piston seizure .In this your asking for 20 :1 or 50: 1 is impossible to answer. Have fun blowing up 2strokes they always work best just before they blow up.

[@dadsvespa]

See ! If you only listened to us Northerners about sno-mobile engines sooner, you would have had all this fun....years ago ! lol ! Happy Thanksgiving guys !! peace

[@MulletMTB69]

5:08 Cue the DirecTV voice-over: "Just OK is not OK." 🤣