Honda Spree and Elite 50 Forums

Well listen.. No change has been made since day onen.. No mAtter what clip its on or any other thing ive tryed,,it has always reacted the same.. Fires right up one kick idles beautiful , then the problem as described.. Carb is put together correctly 100%..leak down test i could do.. But it would be a lean bog n cut off it had a air leak correct? Its will stay running.. I can pull the throttle all the way and it wont cut off sounds like a 2 step on a honda car or somethin.. Just popping out the exhaust at an rpm that wont climb..im gunna measure squish and all that tomorow..copper wire method..im still listening tho guys lol

Sounds like a dirty carb, misassembled ignition system or a bad reed or case leak. I would try to see if the cdi and coil are functioning properly

Carb is brand new.. Disassembled n put back couple times.. Im gunna try a diff cdi.. Tryed a diff coil today..

That Yasani doesnt make power until high rpms, I had the same one on my vert jog. The C20 is my weapon of choice but I dont think they come for the verts.
How do the rpms climb if you baby the throttle, is it quick or slow. If its quick I would assume it to be too rich in either just pilot or both, if its slow it could be too lean of a pilot with that exhaust. Thats assuming you can throttle it at all. Most of the time when it sounds like a rev limiter its lean but will pop out the intake. Try covering the intake up partially, if it clears up its lean, if no change take off the air filter, if a change(even a slight) then its too rich.
You really should do a leak down and pressure test.
Stupid question but do you have the piston in correctly also, a backwards piston on a mina will make it sound exactly like you describe and run the same.

All those you have mentioned ive tryed.. No change in the problem with jetting.. Squish clearNce,Plugs..you could slam the throttle and it wont go past lets say 4K rpms and will just backfire..let off throttle back to idling awesome.. Pistons in correctly... I pulled the cylinder and head a few times to change different base gaskets..

Plug was gapped wrong

Congrats, and I must say LOL! At least it was a cheap fix.

Well i tell ya what.. Was told to gap one way and it was wrong.. Talked to spmoto they told me the correct gap.. Talk about a beast of a motor!!

What was the gap and what did you end up using? That yasani pipe and stage 6 is where the power lies really.

Was told by spmoto tech to try .45mm .. Yea stage 6 race +yasuni =powahh .. Also has the stage 6 crank rated at 16k

yasuni r has 2 restricted..

sound like main jet issue cant go past 4k rpm...

motor need to break in rings/piston..

dude go bigger jets

Well its not a yasuni r.. Its a yasuni city 16.. It was the plug was not gapped correctly.. Nothing to do with jetting. And i know how to break in a motor

with mine was that simple i tried multiple new plugs and different gap settings from 0.015 and slowly moved up till 0.035

Well that wa thas last thing i was thinking.. Checked everything but that lol. Good luck with yours.. Thanks for the help guys and thanks LMH