help jetting mikuni 28mm flatslides

[ohiobanshee]

:: i just bought a used 87 shee. it has 28mm flatslide mikunis 30 pilots 270 main jets,20 over bore,coolhead with 18cc domes,radvalve with two stage reeds,and fmf fattys. The problem is after the bike starts on the first kick,it takes gas fine until you ride it for about 1 minute,than it starts loading up and wont rev.When i first got the bike it had a bad bog at 1/4 throttle,i changed the needles too a thiner ones,the bog whent away but the rich condition got worse.Any ideas?

[2strokesmoke]

your pilot sounds a little rich for fmfs try a 27.5 and start at 1 1/2 turns on air screw

[Yaxy]

It sounds like you are in the ball park with a 270 as a main but you are way to rich on the pilot.

 

 

On flatside carbs the signal is much better thus you do not need as much fuel. I have a RZ shee and a shee both full mods and I run 20 pilots in each with no problem starting or on the low end.

 

FYI

 

Chris