Rovan 45cc 'Big Bore' - The first run

[@CarminesRCTipsandTricks]

That was TOO LEAN!!! 😱😱 The fact that you had the high speed screw turned ALL the way out, tells me that the main Jet in the Carb is TOO small.... First thing I would do, is take the Carb apart, and drill out the Main Jet just a little, and try Tuning again. You'll likely find out that the Carb is just too small, full stop! Does Walbro make a physically larger Carburettor? It's STARVING! Bigger Bore, bigger throttle plate, just bigger.... Sure, comparable Engines run just fine with that Carb. But with those Port sizes, she's starving for fuel AND air. She seems like she wants to LEAP when you went from idle to full throttle. However, she kept falling flat, just above midrange..... Also, don't rule out the Exhaust! Sure you made a mounting plate that fits the Port - but that's trying to SQUEEZE into a noticeably Smaller Header Pipe. Now, I don't know tons about 2-stroke Engines, but I've been building Race Engines for Cars, for over 35 years. I'm half decent at telling what a well tuned Engine is SUPPOSED to sound and run like.... Basically, it really seems like this Engine was rushed into production, merely for shock value! I TRULY wish I had one, to try to sort out it's obvious shortcomings.... YOU obviously look like you know well what you're doing. I just want to get in on the fun! I HOPE you get this sorted. Carmine 💥⛽

[@atlas3863]

I watched The video prior to this one he states that the carb manufacture said his carburetor part number is only rated for 35cc...Then add the fact that the exhaust isn’t right and the engine was not broke in While getting the piss beat out of it with a lean condition. I would say those are all good reasons why any engine would run like total sheeeeeeiiiit! but that’s just my opinion. If I buy a cheaper engine I know the second I hit by it now online my expectations won’t be too high rite out of the box. I know I will be tearing the engine apart and doing what needs to be done to meet my expectations like porting,timing done by me. possible carb swap etc Will be more than likely. that’s the savings I’m doing the extra work. and just like anything if you take the time to do it right the first time it usually pays off in spades. and you always need to remember every engine will have a different power band at a different RPM so if it doesn’t like the gearing you’re using it won’t work. then try playing with different spring tensions on your clutch or drilling out The clutch shoes so the clutch will engage later or from the preset 6,500 rpm to 8,500 for instance. its all trial and error. Believe me if you get the formula right you can make a junk engine with a little elbow grease coupled with the right gearing and clutch engagement based on what the engine likes. it will run like a raped ape guaranteed. it just depends if you’re a thinker that likes to tinker or if you want to spend your way out of a problem.

[@almighty151986]

@@atlas3863 Some engines are beyond help..... and I've never broken a single one of my engines in......ESP's...OBR's....Zenoah's......never and they all run like champs. It's just a poor engine and is the result of bodging a 45cc head on to a 32cc crank case.

[@zubuxstein]

@@almighty151986 Its overheating badly, the ba ba ba ba when you let go off the throttle is a clear sign of it. And it may possibly have air leak. If you check his other video, the engine DOES NOT have the mesh mod to protect the flywheel. The chassis and internal part of the clutch shows full of grass crap, no ventilation at all...

[@almighty151986]

@@zubuxstein It wasn't over heating at all.......And it s]doesn't have an air leak......did you even watch the video?

[@goodboyringo9716]

@@almighty151986 .... It's not a 32 with a 45 head , it has a 43 x 31 bore & stroke not a 32 , it has a 38 x 28 bore & stroke . So how do you see a 32 with a 45 head?

[@GazYT1285]

It sounds lean as hell like it’s cooking the internals...did you not check the temps at all? It sounds hot hot hot to me

[@almighty151986]

It is lean.... I even said in the video its running lean...... The high end needle was screwed as far out as it would go as shown in the video. No use in measuring temps as its actively cooled the temp drops fast when you get off throttle.

[@GazYT1285]

Anthony Davis I know mate, I’m just commenting like everybody else does. Your thoughts on the engine then? No good?

[@fpvandgasrc4321]

What pipe are you running on this I just got a rovan lt450 and I dont like the stock pipe. Is it a bartolone thanks

[@almighty151986]

King Motor Fat Boy pipe..... Which is a clone of a Victory RC pipe.

[@2strokerc5782]

I got the same engine no issues at all I have a ruixing carb noticeably bigger than the walbro carb and I bored out my samba pipe header and made my own gasket I've had 0 issues with my engine

[@almighty151986]

You shouldn't really have to change the carb though should you..... it should just 'work' out the box. And your exhaust pipe would still be way to small for the engine too so you're still not getting maximum performance from it.

[@2strokerc5782]

@@almighty151986 I'm getting close to if not max performance port is matched exactly the same as the header pipewise I have a samba big belly silenced but drilled internal baffles pipe diameter at the header and thinnest part of the pipe actually measures the same as the port opening on the engine so full flow from exhaust and the carb that came with this was a ruixing carb for 45 to 50cc engines it doesn't bog down never loses power nothing and low needle is 1 and a quarter high needle is 1 and a half and it's running rich as I like to run a lidl bit rich

[@emrahksk83]

King motor x2 deluxe 34cc or this one rovan 45cc ? Which is faster..have more qualty?

[@almighty151986]

The 34cc is better :)

[@2_be_determined]

I've seen this for sale with a proper exhaust designed for the larger exhaust port. They sell the pipe separate, I'd love to see it with a proper carb and exhaust. I know everyone is on a budget though. Nice transmitter I've got the same one!

[@almighty151986]

The exhaust they sell only has the correct bolt pattern, it's still the same size hole as my exhaust. Rovan don't sell an exhaust that has a flange perfectly matched to this engine.

[@2_be_determined]

Anthony Davis I had no idea, that seems ass backwards to release a engine with no suitable exhaust.

[@levihogge9144]

Anthony Davis hmm I was looking into the 45cc an kinda hesitated for a day an decided I'd let it get out for 2 months see what problems come up as in all new products there's issues . Hope they do something to make that 45cc sing like it should .

[@almighty151986]

It's unfixable bud......once you look at the internals and transfer ports it all makes sense as to why it runs so poor.

[@shelbycarby529]

Do you remember what carb was on this? I just got a 45cc baja and want to check mine out.

[@almighty151986]

No sorry.....it's been a very long time.

[@zubuxstein]

I still got my X2 on its 2nd engine. How you like the 30 Degrees North shell? What tires you recommend from KM or Rovan? I was planning on buying the spoke front tires and wheels for the Baja and mount them on the X2. So wha engine you got now then?

[@almighty151986]

Hey..... 30 Degrees North Shell is amazing....very very tough! And in the UK at least we get a 3 panel replacement warranty so if you tear or crack a panel they replace it up to 3 times. Tires I used 30 Degree North Giant Grip......as for what engine I'm running now...... not running one as I'm purely brushless now...... pure...brushless......power.... check out my video of the DBXL-e...... power that no small bore engine will ever match.

[@fullyrc8555]

I’m looking at getting one of these engines to replace the 30.5 km engine I have, nothing wrong with it and it pulls brilliantly, but as always we look for more power..... I’m not sure it looks or sounds like it has much more :/ the comments don’t look good either lol is this worth getting or is there a better engine to replace my healthy nippy 30.5 cc I got now? Thanks.

[@almighty151986]

Get a Zenoah G320 or the Rovan clone of it. This 45cc is having shit videos all over the place and I recommend you stay away from it.

[@dbxlkevsmith787]

Lewis F check my videos out of this 45cc I’ll change your mind!

[@MduCele.]

Another great video.

[@ItsYouTubeTime2022]

Nice video, love this car

[@RICHIE_RICH89]

Rovan does make a tuned pipe for it I believe

[@almighty151986]

Which is a clone of the DDM pipe which is still way to small and has a small flange. Olimat now make a pip specially for the engine.

[@audis4ni99a]

i cannot find anywhere that sells this engine... links?

[@almighty151986]

www.aliexpress.com/item/45cc-2-Stroke-4-Bolt-Engine-for-1-5-losi-5ive-T-rovan-lt-king-motor/32856698137.html?spm=2114.search0104.3.9.45187309T5eZXI&ws_ab_test=searchweb0_0,searchweb201602_1_10152_10065_10151_10344_10068_10130_10324_10342_10547_10325_10343_10340_5722611_10341_10548_10698_10697_10696_5722911_10192_10190_5722811_10084_5722711_10083_10618_10307_10301_10303_5711211_10059_10184_10534_308_100031_10103_441_10624_10623_10622_10621_10620_5723011_5711311_5722511,searchweb201603_25,ppcSwitch_3&algo_expid=1189defa-78e3-4e8a-a639-c450a9c89455-1&algo_pvid=1189defa-78e3-4e8a-a639-c450a9c89455&priceBeautifyAB=0

[@goodboyringo9716]

FraNkie Pomponi.....`Rovan.com sells it and it's on eBay , what is the problem? Use code RVPCD5 and get 5 % off

[@mrgasrc9869]

I bought a roven 45cc and I have the same problem. Change carbs to a wt990 a bit better but not strong enough so pulled it apart and ported it went hard but still a problem I gave up on the rovan 45cc dud

[@almighty151986]

Even a 990 is too small, the Walbro carb from a CY46 is perfect for it.

[@TheKorpc]

Did you gået new carb for the 45cc engine? And did i help?

[@almighty151986]

No I sold the engine ages ago and ma de a final video.....but the video has gone???

[@kmodkese]

Which chassis is this?

[@almighty151986]

It's a 30 Degree North DNT...

[@RcDungeon]

I hope you get it sorted was looking at buying this engine with there matching pipe. Think running the correct pipe would make a difference?

[@almighty151986]

jimmie stirling Their pipe only has the benefit of mounting up without needed to be cut or modified. The hole in the pipe that the exhaust gasses go through is same size as mine so the Rovan pipe doesn't offer any additional exhaust flow benefits.

[@RcDungeon]

So it was just a shit carb causing running issues?

[@almighty151986]

I won't know 100% until I fit the Walbro 1107 I have on the way to test but that won't bill till Monday, there's still a chance it could be the exhaust port causes interference with the pressure waves in the pipe.

[@219dts]

check for air leaks mate had the same thing when my head gasket was crappy its leaning out

[@almighty151986]

It's sealed using gaskets and sealant bud so it should be air tight and never really blow a gasket, it looked fine when I checked it over but I'll double check it all over when I change the carb (Y)

[@me8u73]

Does sound weird. Also sounds like your clutch is struggling. maybe have to drop pinion size or upgrade clutch setup. interesting though. see how to Rovans compare.

[@almighty151986]

laurent gouriou It's been sold over a month ago now....I did upload a video on it but it's vanished..... Internally the engine is a mess and when you add up the cost of the required parts to make it perform it makes it more expensive then an OBR 32 Full Mod.

[@me8u73]

good thing you could sell it i guess. Lot of people know now to stay away thats for sure.

[@almighty151986]

laurent gouriou I just put it on eBay and let it sell for whatever it sold for. It's a shame really as it had so much potential.

[@Ev0ltion]

Quick question is rovan fully compatible with losi 5t?

[@almighty151986]

Ev0ltion It bolts right in

[@Ev0ltion]

I mean not just the engine but parts for the platform im not sure what your truck is but i tought its rovan all around.

[@almighty151986]

Ev0ltion My truck is a 30 Degrees North DNT.....basically a clone of the Losi 5ive....all the parts for the Losi 5ive fit without issue and they for the Rovan version of it too

[@Ev0ltion]

Ive read some forums about rovan and it seems these have slightly diffrent dimensions than x2, DNT and 5t. Even on rcmodelz rovan arms are described as rovan only while km arms are fit for 5t and DNT.

[@almighty151986]

I honestly couldn't give you a definitive answer bud as I've never had a Rovan as I would always choose the DNT or X2 over one.

[@love_4_rc180]

Nice Vid. Saw this motor brand New on eBay, had it on my watch list. The only thing that had me 2nd guessing was, they said it was only 6.5HP. Not sure if they was right or not.

[@almighty151986]

Nitro Wave Rovan rate it as being 3.88bhp

[@tim03031979]

How about a walbro-hda-48-carburetor

[@joecarthy2971]

Where did you get this engine from hope you get it sorted Keep on wrenching m8

[@almighty151986]

Joe Carthy Rovan on Aliexpress.

[@RICHIE_RICH89]

Low jet lean high jet lean

[@almighty151986]

Yes.... We established that in the video.

[@poppysrcandmodels]

Hate it gave you a fit! I'm sure if anyone can get it straightened out you can! Cool looking rig! 😉👍

[@pauldenmark3629]

I would like to put a Roven 45cc in my KM001 what would be the best gearing do you think? Or do you think it’s a bad idea as engine is too big? I’m happy to do the exhaust port.

[@almighty151986]

Completely the wrong engine for a Baja dude......

[@pauldenmark3629]

Anthony Davis. Thanks for your speedy mate. I guess I know it really but just like the idea. What would you say is the best motor for around the same price as the 45cc?

[@almighty151986]

@@pauldenmark3629 Depending on what engine you have a head kit would be the best option as it'll bolt right on to your existing engine. But the fastest Baja I have ever seen for bashing was a 26cc that had been ported..... The Baja is lighter then a Losi 5ive and because it's not 4wd it doesn't need an engine with a high amount of torque to get it moving, it needs an engine that revs crazy high and for that a 23cc to a 27.2cc is perfect for it.

[@pauldenmark3629]

Anthony Davis That does make sense. I think mines a 26cc it goes well once it’s got there it’s just a bit slow off the mark.

[@almighty151986]

@@pauldenmark3629 A ported 26cc head kit would be the perfect upgrade to make..... should cost half the price as the Rovan 45cc too.

[@GazYT1285]

I’ll stick to my zenith g320, plenty of fun. This sounds tird and no performance

[@gtcdoerner]

took head of it got a Windows piston yes I changed carbs big differance

[@almighty151986]

Greg Doerner I sold it over a month ago...... It's just not worth the time and effort.

[@Harleyfunman]

ive heard nothing but issues with this 45cc ,id stay away if i were you,its not fun fixing a new Rc that should be good out of the box.buyer should stick to the 36cc motors.

[@stickman8912]

The 36cc that I have is junk I would get away from the rovan motors

[@adamruddockshrek]

air leak on the carb throttle arm do a bearing mod

[@almighty151986]

adamruddockshrek No it's not.....carb is too small and not supplying enough fuel.

[@RICHIE_RICH89]

You took way to long to tune that I'm surprised it's not cooked

[@almighty151986]

Try watching the video again as you clearly didn't watch it properly.

[@gtcdoerner]

by the way head gaskets over hang badly inside

[@gtcdoerner]

I think it might need to be 20:1 mix and close of needles more

[@shawnhartley4089]

Id throw that motor in a lake. Wow. Not impressed

[@ioswd1]

my Rovan was a huge pile of crap. Will not buy a Rovan again

[@TheKorpc]

Get the new carb😂😁

[@anthonycharles2351]

Don’t. Look. Good. 🐢🐢🐢🐢🐢🐢🐢.

[@paulvoon6738]

All rovan carb is clone....997=668...998=813.....1191=1107

[@almighty151986]

paul Voon So it's not a Walbro carb then is it? So it shouldn't have Walbro cast in to the base of the carb and the engine shouldn't be listed as having a Walbro carb.

[@JustRockRC]

Anthony Davis it shouldn’t but it does. Rovan copies everything to make a buck.

[@applepiperc9696]

lol walbro makes those carbs for rovan and km brands but they re legit bro

[@applepiperc9696]

but now they re making their own called rofun in the cheap rovans because of that

[@applepiperc9696]

king motor will always use walbro legit carbs both are same company and owners but different markets even in australia theyre different and called different like the sand bengal 5b

[@markbauer3442]

Looks like that motor has no torque...If it has a big piston and a short crank stroke then all that motor is good for is circle track !!!!

[@almighty151986]

31mm stroke and 43mm bore......

[@paulvoon6738]

Too lean....

[@almighty151986]

Faulty carb.... new one on the way.

[@paulvoon6738]

Anthony Davis seem that carb too small for this big bore engine....find Walbro carb for 50cc engine...should be better

[@almighty151986]

paul Voon I have an 1107 on the way..... RCMax use an 1107 on their 46cc so it shoukd be more then enough for this.

[@paulvoon6738]

Anthony Davis it sound like needle valve problem.....why don't you try another 1107carb

[@almighty151986]

paul Voon That's why I've ordered a new 1107.....the engine also doesn't come with an 1107.