air filter problem

[RickG]

If you take the air filter out you may be able to see where the crankcase breather enters the air box. If you then start the bike and a load of blueish smoke/mist chugs out of the breather you have indeed got combustion gasses entering the crankcase. Let's hope not.

 

[Mad Paddy]

thanks will try that in the morning

 

[Sot1200]

when I went for the keihan headers saw my fuel consumption rise by half a liter per 100km as a result of that. When recently disconnected the battery for some electrical work and did the three turns of the throttle so that the position of the throtle is registered found that fuel consumption has returned to the levels prior to the header installation, now averaging 5.7l/100km. Dont ask me why but it did and no did not diconnect the battery at the time I put the new headers on

 

[Andy Michael]

Is the air filter the standard or an aftermarket one?

 

[Steptoe]

I guess that you'd get the same effect from burnt exhaust valves as a result of the full system, fitted from new, causing the mixture to be too lean.....

Burnt valve(s) + twin cyclinder = engine wouldn't run. At all.