[jonny85]

ok so i just took my bike to the mech and one of the problems i currently have is most likely for the engine being too rich and no giving the best of power at certain revs, apart from that what i think is also that the previous owner which i now regret on buying the bike from, had a viper exhaust installed and after checking they do not come for cbr 400's, so i'm thinking it's either a leak from the small clamp from the pipes to the can which can be tightened or the can is too big to give the right amount of back pressure.


any thoughts on this? anyone

[Surffrog]

Originally Posted by jonny85

ok so i just took my bike to the mech and one of the problems i currently have is most likely for the engine being too rich and no giving the best of power at certain revs, apart from that what i think is also that the previous owner which i now regret on buying the bike from, had a viper exhaust installed and after checking they do not come for cbr 400's, so i'm thinking it's either a leak from the small clamp from the pipes to the can which can be tightened or the can is too big to give the right amount of back pressure.


any thoughts on this? anyone

While a big, non-standard exhaust may make the bike run rough, I would have thought it would more likely make it run lean, not rich. If its running rich, check the air filter, spark plugs and HT leads, then give the carbs a clean and balance.

[soupnazi]

Originally Posted by Surffrog

While a big, non-standard exhaust may make the bike run rough, I would have thought it would more likely make it run lean, not rich. If its running rich, check the air filter, spark plugs and HT leads, then give the carbs a clean and balance.

+1 for balancing your carbs. You'll probably find they're way out and this really affects the performance across the rev range.

You'll need a set of vaccum guages to do it, if you're not sure about how to do it though take it to a mechanic.

[Nitro]

Originally Posted by Surffrog

While a big, non-standard exhaust may make the bike run rough, I would have thought it would more likely make it run lean, not rich. If its running rich, check the air filter, spark plugs and HT leads, then give the carbs a clean and balance.

Originally Posted by soupnazi

+1 for balancing your carbs. You'll probably find they're way out and this really affects the performance across the rev range.

You'll need a set of vaccum guages to do it, if you're not sure about how to do it though take it to a mechanic.

+2 for the carbs...they need to be well tuned for optimum performance...it took me 6 mths to decide which mechanic to bring her to based on friend's reviews as I noe nuts how to do it myself...And it was worth the $