Hard Starting after Rebuild

[r4mclaren]

Ok so here is the story.....

 

I've had my banshee for about 5 years now. When I first bought it, supposedly it was rebuilt, but I have now idea if it was or not. It had a cool head, fmf pipes, vforce 2 reeds, stock carbs. About a year after I got it, I got a Trinity 2 into 1 carb kit for it, 19cc domes for the head. I don't ride much, maybe 30 hours a year. Earlier this year I was riding around, was trying to carve out a track in a field so I was wide open for oh I'd say a half and hour or so, then no power from right cylinder. After tearing apart the motor, there was a hole in the piston, yay. So I just got done putting new pistons in and cleaning everything. Before the "break" it started on the 3rd kick or so in warm or cold weather, now, the only way I have been able to get it to start was by blowing some compressed air (not much) into the carb, after that it starts right up and idles fine. If I shut it off, wait 20 mins or so, while the engine is still warm, it fires right up. I cleaned the carb entirely twice, cleaned the reeds thoroughly. Compression after rebuild with WOT was 120psi on both cylinders. Another thing to mention is that the left cylinder did not seem to fire all the time while idling, the right pipe got hot while the left pipe was room temp, I did try swapping plugs, but I didn't try swapping wires although both plugs have spark, however it did seem to fire once revved up.. Any insight would be appreciated.

[Jereme6655]

when you pulled your carbs apart to clean them did you take both the main jet and pilot jet out of the carb to ensure the passages were clean? And also what size pilot jet do you have in your carbs?

 

It almost sounds like your having a problem with your pilot jetting as its a starting problem..... stock is a #25 pilot jet.....with your FMF pipes you should be up to a 27.5 pilot.

[bansheesandrider]

when you pulled your carbs apart to clean them did you take both the main jet and pilot jet out of the carb to ensure the passages were clean? And also what size pilot jet do you have in your carbs?

 

It almost sounds like your having a problem with your pilot jetting as its a starting problem..... stock is a #25 pilot jet.....with your FMF pipes you should be up to a 27.5 pilot.

He said he put a 2 into 1 setup on, so that rules out stock jetting along with the choke tube problem.However since he burned a hole in a piston and it is hard starting, I would agree he has a jetting problem. But you can't suggest stock carb jetting to him. Somebody familiar with a 2 into 1 setup needs to chime in here AFTER he tells us what carb he is running and ALL other mods he has.

[Jereme6655]

oh snap....good catch sandrider.....he said he has got the trinity 2-1 carb kit......i read it and for some reason it clicked in my head that he had the 2-1 air filter kit haha. That's why i mentioned the stock pilot jets possibly bein wrong sized. good eye man...thanks for the correction

[r4mclaren]

Engine Specs:

 

Dyna FS CDI

Keihin Carb (It's either 33mm or 35mm.)

vForce 3 Reeds

Cool Head with 19cc Domes

Wiseco Pro-Lite Pistons (64.75mm)

FMF Gnarly Pipes

 

Thanks for your help.