RE: back fire

Suzuki Boulevard C90 discussion forum:


RE: back fire

RE: back fire 
James Warren said 2007-12-02 21:46 
 
This only happen when you dump the throtle- not a real problem.
Just ease off slower it should OK but if not will not harm bike.
On deceleration the pair valve opens allowing fresh air into exhaust port cooling exhaust valve and adding extra air to exhaust pipe, sometimes the extra air in the exhaust at firs will couse a pop of sort. 
 
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