mini bike carburetor comparison

Mini bike carburetor comparison
Tested a 24MM PWK a 65MM PWK and a 28MM PWK carburetor on the Predator 224 powered GTS minibike to see which would perform the best out of the three.
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*********Disclaimer*********
Please do not try to re-enact or recreate anything you see in these videos.
Black66 does not take any responsibility for injuries or equipment failure created by doing so. The following video features activities performed in controlled environments by knowledgeable persons. DO NOT attempt to duplicate, re-create, or perform the same or similar activities at home, as personal injury or property damage may result.
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[@dmann1209]

Awesome looking bike B66. The chrome is very nice touch. I find it very interesting the impact of carburetor size and jetting at different elevations. Logic would say the bigger the carb the better, but that is not always the case. Science and engineering is amazing!

[@mlindsay527]

Thanks for taking this one on. Probably one of the hardest variables to test. You might look into a header mounted O2 sensor to compare A/F ratios between the carbs. My hunch is that the smaller carb runs a bit richer. But your results were not linear, so who knows!

[@andrewkuhtz]

Black 66, Sweet comparison! On my predator 212 hemi build with all billet parts, flat top piston, banzai 265 cam and ported 224 head the 28mm is night and day compared to a nibbi 24mm and 24mm flatslide carb…thaught it would be too big of a carb! But its not! Thanks for sharing👍

[@aaleexsaalaazaar]

I have a similar build, what jet are you using and what altitude are you at?

[@johnk6346]

I am back watching your channel. Another informative video 👍

[@WyFoster]

You might also need to go down on the jet sizing for the smaller carbs as they'll get more vacuum signal from the engine and pull more fuel even through the same size jets.

[@richardramirez-st8nc]

How?

[@WyFoster]

@@richardramirez-st8nc Science!!

[@richardramirez-st8nc]

@@WyFoster why ?

[@999benhonda]

Interesting comparison, but the different sized carbs needed different size jets to work at their best. The smaller carbs running the same jets as the big one likely made the mixture rich.

[@WyFoster]

another cool metric I think would be very useful would be a mid range test. Say 20-40 mph to compare how the engine performs in that range we're driving in most of the time.

[@JefferyPoff-n1s]

Unrelated question has anyone installed the mega Moto swingarm kit on a Coleman b200r

[@hellheart1993]

Cool, i thought it keep going down mph as it goes down size This is why its important to play with all parts to find out what best for your bike they can be unpredictable

[@SpACeCruizeR2o3]

4.54 is pretty decent compared to a car from a red light they usually can't keep up unless there just actin like they can't but on a automatic car a minibike is def faster when the car hits 15 mph it shifts most of the time by then I'm almost at 30

[@hellheart1993]

Happy New years 🎉

[@arnaldopaulinomotos2945]

Gostei irmão do vídeo, 👏👏👏👍👍👍🇧🇷

[@Black66]

Obrigado por assistir!

[@zl1]

It would be cool to see you compare the open p grind cam vs 330 volts cam

[@Black66]

I have some more cam videos coming. I have a new one out tomorrow

[@dabtech7456]

Volts cams are just Isky cams

[@connordejac9554]

What jets did you use in all the carbs???

[@connordejac9554]

Please help!

[@th3adv3rsari]

sick GTs frame bro. i really wanna get me one with the taller volts bars but no one ive contacted has replied... could you lead me to the right person to contact about ordering one>?

[@Black66]

Honestly, I don't know. I have been hearing a lot of people saying the same thing. Having a hard time with orders. I recently picked up another GTS bike used. I see them on Craigslist and Offerup from time to time. I get most of these bikes from those sites or even yard sales.

[@th3adv3rsari]

right on man thanks for the reply. see ive considerred doing it that way but i want one brand new from the source know what i mean. out where you are theres probably quite a few of those bikes locally for purchase or at least an hours drive, but im in indiana and no one has taste like that.@@Black66

[@darrellnichter9894]

I'm in northeast Indiana and I hear ya...they want gold prices for stuff even if and when you come across it​@@th3adv3rsari

[@th3adv3rsari]

yes maan its starting to get irritating, tbh. i mean if i was running a business, id be taking care of my customers for sure. i always used to see them on instagram packing frames ans shit for shipment so ......?? theyre supposed to be one of the best companies out there but not doing to well imo @@WalkerSmallEnginePerformance

[@eddieqamos4483]

What jets were u running on 28mm

[@Mini_MotorsMN]

?

[@JaimeRodriguez-fl2me]

What do I need. For my 212 cc predator engine. (24 mm). (26 mm). (28mm) ??

[@818adventures]

Can you plz do a video on the functions of the choke plunger on the pwk carbs.

[@duckygang603]

Were did you get your carbs at?

[@g-track5065]

what 2 jets you use for them?

[@douglashogue9495]

What jetting and needle did you use on your 24mm , thats what i run and im at like 34/110 middle grove on the needle seem like it wants more fuel to rev out . Stock cam and advance timing

[@Black66]

Everyone's jetting will be different depending on Altitude, weather, engine set up etc.

[@JavierMartinez-mm2en]

What jets did you use for them ? I have the same carb and having trouble with it

[@Black66]

Check out the carb tuning videos . Elevation , engine mods etc have an effect on jetting kzbin.info/www/bejne/emavaX-qqMaBlck

[@I_am_Jesus_of_Nazareth]

You should be rejetting for every carb size.

[@Black66]

Yes, re-jetting for elevation, and engine mods ect, The point of this video was to see what would happen with a given set of jets on all three carb sizes and of course just to have fun. Thanks for watching!

[@I_am_Jesus_of_Nazareth]

@@Black66 I watch almost every episode you drop every week, and I enjoy the content. Would just like to see this same comparison, with optimal jetting. Also I would love to see a CVT consistency vs Clutch consistency video.

[@Black66]

​@@I_am_Jesus_of_Nazareth Yeah I hear ya . I'll try and do it in a up coming video.

[@jeffreyplumber1975]

@@Black66 Im just an old guy from the Taco 22 days but love watching these I found it real interesting the three carb comparison, I think if you had the time diailing these three carbs in with proper jetting might get differant results that 24 might even be the best carb You share a lot of good info I seen you in LA with those young guys they are pretty sharp but sometimes people tend to follow the trend rather than do some tuning and finding out which jets and carbs do what they want it be real cool to follow up so they can see you dont nessesarily need to go buy another bigger carb to go fast

[@Black66]

Yes, for sure! I'll have to do a follow up at some point. @@jeffreyplumber1975

[@SDS-1]

🤟🤟💓

[@PhatGuy420]

Do your neighbors ever complain about you flying up and down the road?

[@ryleepierce9589]

just installed new knock of mikuni carb,it started with the old carb,but know it wont,has spark and compression,any idea why it wont start?

[@Black66]

Yes maybe , check out this video kzbin.info/www/bejne/mGbFimBnnK6Kjc0

[@lacehepbourn1035]

Hello Black do you have an email or social media so that fans and curious folk like myself can ask tech related questions?

[@johnsmith-zd5he]

what gear ratio do you have on that bike roughly if you dont mind me asking? I have a mini chopper i built from scratch with a 212 tilly, 265 cam, pipe, billet rod/flywheel, vm22 and have a 5:5.1 ratio and only get about 49 out of it with a juggernaut and 14" tire. goin to gear it up a tooth on the front to hopefully hit close to 60. I think it wants more carb also so i may try a 24 or 26mm?

[@Black66]

Check out the mini bike playlist. I have done almost 400 mini bike videos. Its hard to remember a given bike.There are quite a few videos with this bike in the playlist. kzbin.info/www/bejne/mpvNiZiZn5d6n7c

[@johnsmith-zd5he]

@@Black66 I can do that. Ive watch all your vids many times hhah!! Great stuff! If memory serves me right, i think most of your gearings are in the low to mid 4s to hit 55-65 mph?

[@Black66]

@@johnsmith-zd5he Yeah alot of them are in the 4s. I could gear them closer to 5 or 6s but I would have to spin them harder. Check out the gear ratio calculator . With a couple of inputs you can figure out your speed give or take. www.gokartsupply.com/ratios.htm

[@johnsmith-zd5he]

@@Black66 ive done that, but you never know how much the engine will rev so i found one of your vids and it was perfect info as usual haha! doodlebug gear swap. you had a 4:6.1 and hit almost 50 with room to go before you shut her down. ill be at 4;9.1 with a taller tire so thatll be perfect. I might replace the vm22 with a nibbi24 and even put a bigger duration cam in place of the banzai 265 to get her really revving?! right now with a 5;5.1 itll do about 50 and also pull a wheelie for about 20 feet so these mods might really help lol!?

[@Black66]

@@johnsmith-zd5he Yeah that sounds like a plan! I like that 4.9 it will make it a little more fun and snappy .

[@HoeLeeFuQQ]

Links?

[@Mini_bike09]

What difference would that make for a 97cc Doodlebug db30 with a 65tooth rear sprocket

[@th3adv3rsari]

is it stock motor ? or did you do some shit to it

[@Mini_bike09]

@@th3adv3rsari only thing that has been done tk it is I believe a removed governor and a paper clip that pulls the throttle all the way causing it to be fasy with a 65 tooth rear sprocket

[@th3adv3rsari]

so you are running stock carb then correct? has it been jetted? and what about exhaust? if that's the case then bro get a 24 mm nibbi PE, (thats what i would get and what i run right now, but get whatever you feel is right and what you want), and dude youre gonna see some major gains. its gonna be sick i guarantee it. i couldn't hardly believe the increase in speed and throttle response at first. i shit you not bro i gained 10+ mph from just the carb.i had to jet it correctly of course cuz they come set up for like 125 cc dirt bike. so youre gonna need the jet kit as well. the carb and jet kit came out to be around 75 bucks. you could get knock off mikunis and shit for cheap but i like to get authentic shit when it comes to my mini bikes lol and mikunis are not cheap at all, which also why i suggested the nibbi. 60 bucks for damn near the same outcome. IMO @@Mini_bike09

[@BetterAnthonySpano]

65mph……. Man that’s a fast bike

[@Black66]

Thanks, Its ok. I really wasnt going for speed in this one. Mainly just comapring parts. The bike that is actually quick and fast on the channel is this bike. check it out. kzbin.info/www/bejne/j5XLl5mtqNBgiac

[@BetterAnthonySpano]

@@Black66 67mph is my top speed over all my bikes. I haven’t got any faster than that. But I will check the vid out thanks for the recommendation. I’ll have a vid out of a dirt bike pretty soon, check it out if you have any time

[@BetterAnthonySpano]

Yeah man I watched that vid of that e bike😂😂. Crazy fast man

[@SpACeCruizeR2o3]

Got me a new coleman rsv frame on the way there only 300 bucks boss why get middle manned when u can get it right from the GiFT HORSES mouth lol Merry Christmas 🎅 🎄 the swingarm is only 40 bucks lol and the shock absorbers crazy cheap man on their website u gotta go under parts the go cart place has the mb200 frames but they want like 400 something I figure the new rsv will make me a happy camper right ✅️

[@Black66]

I agree, that is why I pick up most of these bikes used off of Craigslist or Offerup. No need to pay retail for anything.

[@SpACeCruizeR2o3]

@Black66 that's true hey Happy New year too huh 💪🏼💯💨💨💨💨 go get em Mr Black66 I can't go cruise I was hit off my bicycle very bad my whole spine is screwed man those Lil pepe driving mfs can't see over the wheel ran the stop sighn smh stay safe out there if I was on my meenie it wouldn't of happened because I would of had that 212 power to get out the fuggers way 💪🏼

[@RaceReady2A]

Ok I’m writing this having only watched the 28mm trials…. I’m gonna say just by listening to that 224 that it’s too much carb for that build. It sounds weak.. that’s not a dis just an observation. I’m betting RN that the 26 and 24mm do better… I have a Mikuni 28mm flatslide for my 241cc small block with a 32/25 head. Until I got that head and that 285 cam I have I was not gonna do 28mm. My question now is since my head is 32/25 what’s the max I can do without issues or waste? I’m wondering if 30mm carb can work now.

[@RaceReady2A]

I was wrong.. I’m concerned that you only gained .10 sec though. That tells me you can do way more with that carb with more beef cake in your engine 😁💪🏻

[@PopeyesCreeper]

I also have a semi modified 224... Since I swapped out for billet internals and 18 lbs springs.. it runs really hot.. almost immediately.. I've read a stock spark plug could be the cause of that.. do you know any truth to that?

[@jamesgravel7755]

That vacuum on the 24mm was just right for that size engine. With a little tuning I bet you can beat the 28mm top end and have a way nicer mid range. It’s all about that signal to the carb. You found the sweet spot but I got a hunch you already knew exactly what you were doing when you made the video. This isn’t your first rodeo

[@frederickstephens7507]

Can someone help me? I have the pwk 26 and my engine idles at 6,500 rpm I have tried turning the screws all the way closed but it doesn’t change anything. I shouldn’t have any air leaking from the carb

[@calvinhobbs89]

Disconnect the throttle cable see if it still does it. If it doeant then ,that's the reason throttle adjustment , if it still over reves it the slide adjustment on the side of the carb. Most likely

[@johnsmith-zd5he]

i found out there are two mikuni cables, one is about a half inch shorter than the one you need. I bet thats the problem!? that or you put the slide in 180 degrees off, which ive done before haha.