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Buell Motorcycle Forum » THUMPer Forum » Buell Blast Thumper Knowledge Vault » Diagnosing problems: » Archive through December 24, 2008 » Engine knock. Help! » Engine "knocking/pinging"? For many, mystery solved... « Previous Next »

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Bitbear
Posted on Tuesday, July 04, 2006 - 07:04 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

From page 66, 2002 Blast Owners Manual:

"IGNITION TIMING...NOTE: The ignition module of Blast Models has two spark timing advance curves controlled by the throttle position. In certain transient load conditions, as the throttle is opened, the timing is changed from normal to fully advanced causing an instant pressure rise in the combustion chamber as the spark advances rapidly which may result in a noise that is similar to detonation ("knocking").

"This condition is normal and should not be confused with detonation, which can be stopped by the use of a higher grade fuel. This condition does not affect engine performance or durability."
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Buellistic
Posted on Tuesday, July 04, 2006 - 09:15 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Always run the hightest octain hightest gas you can get at the pump !!!
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