July 15th, 2013, 07:33 AM
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#2
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Rev Limiter
Name: Jay
Location: WI
Join Date: Jul 2013
Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes
Posts: A lot.
MOTM - Jun '18, Oct '16
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Check for a vacuum leak around the boots between the carb and head. You can spray some WD-40 or similar fluid around the area and listen for a change in RPMs.
Also look at the routing of the throttle cables, and confirm that the throttle snaps shut when you open the throttle (engine off) and let it go.
I would completely drain the gas and add 1 oz per gal of a strong fuel system cleaner like Techron Concentrate to a fresh tank of 87 octane Ethanol-free gas (if you can get it).
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