Right Cylinder goes in and out

[SpeedRacer88]

just put together my buddies bike

4mil dune port blaster angle 18cc domes

shearers

stock carbs 25 pilot 350 main uni filters

sea level +4 timing

 

bike runs fine (a lil rich) until 6th gear when right side dies

 

I kill the bike and start back up and it comes back

 

thought I was running the bowl dry but when I pull the plug they are wet

 

so thought maybe I was soaking the plug leaned out the needle until I was visibly lean same outcome.

 

I swapped cdi box and also tried swapping around plug wires and tried new plug caps

 

set gap on flywheel insanely close same outcome both sides have good compression. Topend is new

 

Crossover tube is installed in between carbs

 

Any ideas?

[J-Madd]

Carb sync? Usually an out of sync carb shows up right off idle unless it is way off though. Reeds? I would think it would be air leak if the plugs were wet, but pressure test wouldn't hurt.

[SpeedRacer88]

i would think that if it were low on compression it would show in the lowerer rpms

 

and i did a leak down no air leaks

 

carb sync is good

 

reeds are good

 

thanks for replying

[J-Madd]

Is there any chance it's sucking water in the cylinder? And compression loss will show more on top. Maybe a stuck ring? Were the cylinders honed and chamfered properly? Which side is bad?

[sheerider11]

Hmmm, a 25 pilot does not sound right at all. My girlfriends is a 27.5 280 on a SS trail port with fmf and k&n at sea level.

what are the plug gaps at? What's each side of the coil ohm at? Could be a bad coil favoring the least resistant path. Some how I got a B8es and a b8ers in the same bike, resistor plug wouldn't fire. Just something to look at.

[SpeedRacer88]

Imma compression check it tomorrow with a guage

 

I swapped the coil today. No go

 

And I don't think it's sucking water I'm not losing any

 

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