Quote:
Originally Posted by yorkie_chris
And northwind (Andy?) while you're here...
After putting a Fuel SS oval can on I seem to have a flat spot at about 4500rpm, shows itself as a hesitation when accelerating at WOT.
I'm thinking shim the needles a bit?
Chris
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Sorry mate, I missed this. A shim or even a whole step up the needle'd probably fix it (UK svs have slotted needles so you can just move the jesus clip, though that's a big jump), but it could be the mains starving the needle. It's a wee bit far down for that though Try something for me, stick it in 2nd or third, ride along at 5-6000rpm, and bang the throttle right open, see what it does. I think it might have a stumble before it drives, and if it does, that's a nice symptom for undersized mains, since that's where the cross- influence is. It's not foolproof but it's a handy trick.