Any possibility of "bad" carb causing overheating?

[johnny248]

I'm pretty sure johnny248 has a stage 6 24mm also. He's swapped carbs and the same result. Leak down test has passed. Compression safe at 145. Swapped cdis, fw, and coil. Runs good just over heats. This engine is cursed. It'll get sorted out eventually if I was to bet, he's very determined. With the jetting he's using he could power a 26mm carb for sure. It's just not possible, yet it is..
I forget if he swapped pipes also.

Correct. Same results. I have G9's c16 on there now, and a PG Short prior to that.

Bike runs really well, it just heats up at higher rpms/throttle. Driving me crazy lol, I had to take a day off from messing with it. Dealing with back pain (not from the scooter this time lol)

I was going to take it over to Gratiot's to let him ride it and see what is going on, but it was raining like crazy all day, and I've pretty much been laying down. Getting old sucks... I'll get back on it in the next day or two.

Oh, let me just throw in that yesterday I rode it 112, #5 clip, still gets hot, putters more at low throttle. Thats it.

[Dbroogs]

Runs well just heats up at higher rpm/throttle.

This is me just throwing out a wild guess but maybe you have increased friction somewhere like gearbox or tranny. If you have messed with jetting and it isn't changing anything than maybe its not air or fuel mixture problems. Maybe it is load problems.

But once again, not an expert, just guessing

[johnny248]

Let me try to touch on all of those posts.

I've had two different exhausts. Same results.

Pressure testing. I plugged the exhaust, installed a pvc cap with a valve stem in the intake boot in place of the carb. Filled it with air several different times, between 5-7.5 psi. Looked for leaks with soapy water, left it sit several times for 15 min or more. Still maintains the same pressure at the valve stem.

The fan is a stock fan I ordered from Honda. Not the green one in the earlier pictures.

I did replace the gears, but the rear wheel seems to spin freely when off the ground.

I have two carbs. One Polini, one s6, both 24mm.

With the smaller jetting it runs great, has great power. With big mains- 124-130 it has less power , sputters, etc. With a 138 it will bog down and not really go after getting above 1/2 throttle or so.

I'm going to try to get it over to Paul to let him take a look. From there , I couldn't begin to thank G9 or 1man enough if I could send the engine out if Paul can figure it out.

Do I need to send the exhaust and wheel also? That would be amazing if someone could get this going.