Don,
Spot on, bench synching is to get you into the ball park (hopefully) as you say the variance in the inlet tract , wear on the mechanicals will distort the REAL world results. It is what they teach in basic Mech school but go on to live synching a bit later (well they do at Yamaha anyway).
The Carb sync Tool in Wiki section
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yamaha_george
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thatkid
Re: The Carb sync Tool in Wiki section
Dare I mention that if you have low compression it's a waste of time synchronizing the carbs, especially if your Inlet valve's are tight/burnt out. They will NOT synchronise!
Induction = Vacuum, Compression (with tight/leaky/burnt Inlet Valves) = blow back into the carbs, Ignition (with tight/leaky/burnt Inlet Valves) ditto + carb backfires, Exhaust hmmm....
I.E. if you can't synch the carbs (they are really fluctuating) it's more than likely that reelrazor's info (which I trust, I think others do also) concerning the FZR's SOFT inlet valves, are most likely the fault. NOT the carbs.
Induction = Vacuum, Compression (with tight/leaky/burnt Inlet Valves) = blow back into the carbs, Ignition (with tight/leaky/burnt Inlet Valves) ditto + carb backfires, Exhaust hmmm....
I.E. if you can't synch the carbs (they are really fluctuating) it's more than likely that reelrazor's info (which I trust, I think others do also) concerning the FZR's SOFT inlet valves, are most likely the fault. NOT the carbs.