bike chugs

[drduimstra]

So I didn't think it was such a big until one of my friends told me that my chugging around 8k rpms on 4th gear and up is a bad  , so anyone has any clue what causes this?

[redhenracing2]

What do you mean by 'chugging'? Similar to the 'lug' that you get at low rpm's? Or is it just a noise that it makes?

[007brendan]

Sounds like a lean condition. Might be an air leak somewhere. Check the carb boots.

[kman]

could be a vacuum leak between the carbs and airbox too.  had this happen on an older yamaha maxim and it would get to about 7500rpm and stop like a rev limitter.