Missing/sputtering @ WOT

[hotrodbanshee]

Last year. 180psi compression

When was your last rebuild?  Have you checked compression?

483925[/snapback]

[Handyman]

I had the same problem about a month ago......I swapped out my stock pilot jets for a set of 27.5 piot jets......fixed the problem

[banshdog]

I dont think that pilot jets are going to correct his problem at WOT, but hey give it a whirl.......

[dawarriorman]

Last year. 180psi compression

484076[/snapback]

Uhh, you shouldn't be able to get much if any higher than 160 with 21cc domes. Did you check compression warm? If not, get a new gauge for your tester.

[FIRST BANSHEE]

I am on the 4th clip down from top  dynojet needle's. Still have the stock needle's, should I try them?  I was running it around 1/4-3/4 throttle for a while and the plugs were very dark tan/black, looked rich to me. I took it out on the road and held it at WOT for 5-10 sec and the plugs got lighter in color.

482278[/snapback]

I'd rasie the clip that should lean out the middle a little, see how you like that.

[J-Madd]

I had an identical problem that persisted for 2 years, regardless of carbs, jetting, even different cylinders. I was convined that the problem was jetting at first, then figured it was electrical. Swapped CDI boxes, ignition coils, but not stator. It didn't act like a stator issue. I bought an '06 and put the same top end, carbs, etc on it and it ran great...no sputtering, etc. (I did however seize the mf'er up by setting for about 15 mins and letting it cool off accidently in 30 degree weather, then hauling ass on it............cold seize.)

 

 

But my problem was exactly like yours,....only ran like piss at WOT, regardless or lean or rich condition. I have changed the stator and will know tommorrow if it fixes mine, but I'm pessimistic.

[J-Madd]

I don't know if you still have the problem, but swapping stators did fix mine.

[hotrodbanshee]

I went ahead and did some changes to my shee. I changed out the dynojet needles,the clips on the 4th groove to the stock needles, clips on the 3rd groove from top. Cleaned my spark plugs on a wire wheel on my bench grinder and narrowed the plug gap to .020 She ran perfect for me with no miss at all @ WOT. I only ran her for 15-20 minutes. I am going to try and get out this weekend and ride and hopefully I won't get the missing out @ WOT. By the way I had 340 mains installed instead of 330 like I posted at the beginning. I think shee was fouling the plugs in the mid range and causing it to miss out at WOT. I do ride alot of trails.

[sredish]

If it happens again, right when it starts doing it, hold it WOT and kill it. Then remove the plugs and inspect. if you kill it right when it's cutting out, then you should get some explanation on the plugs. if they're wet and dripping, then you know your fouling them somewhere along the lines.

 

i am one of those people who do not like the Dynojet needles. I would run the stockers, and it sounds like you've already switched back.