1980 CB750F Popping and Backfiring.

Posted by GunnerStaal on Jun 16, 2013; 1:20pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/1980-CB750F-Popping-and-Backfiring-tp4042357.html

Hello Gents,

I recently purchased a used 1980F with about $24k on it.  I know that the 'yard I bought it from put a different set of carbs on it due to an issue with hot idling. I still have some issues with it holding at around 3,500 RPMs when it is nice an hot. My concern is around 5k+ range the right exhaust (its a dual exhaust) has a popping/backfiring sound to it. Also there is a light white smoke with a gaseous smell to it coming out of the exhaust.

I am hoping that this is mainly due to the carbs and can be resolved by tuning the carbs a bit.

I am quite green when it comes to all this and the 750F is my first bike so any words of advice are greatly appreciated!


Thank you