arteacher wrote on 05/13/12 at 16:36:05:Yep. In the last two days I have studied Mikuni carbs and how they work, and cleaned everything. I would suspect the Dial--Jet, except the plug looks like the mixture is good. The thing is... it was working perfectly until I tried the "cut spring" mod, and no matter what I have done, it hasn't gotten back to normal.
The Dial-a-jet does not affect the issue you are dealing with; it's a mid-high range device.
Do you have the stock petc0ck or a Raptor ?
Good seal on the vac line if you still have one ?
This makes me think that the slide may be dropping down instantly instead of in a controlled manner, cutting fuel/air too quickly, resulting in hesitation or engine stop.
Is the pilot screw still set at 2 turns out ?
When the engine is totally warmed up, like after riding a couple of miles, is the setting giving you the best rpm ?
Have you tried adjusting it on the road; testing to see if going in or out will increase rpm ?
If not, try it on your next ride.
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