GS450 will not run without air filter, Normal???

[Darren GS450T]

Hi, My 1982 GS450T will only rev if I restrict air flow into air box, The bikes air filter had rotted, so it had to be removed, I will replace air filter asap, but I did'nt expect it to have such an effect on the air fuel mixture as it seems to. Anyone know if it is just lack of filter stopping bike rev?. Carbs stipped and re built so they are ok, but cant see any way of richening fuel mixture? Thanks, Darren (uk).

 

[Steve]

Yep, that's it. For a quick check to verify, fold a shop rag in half, place it over the inlets and zip-tie it into place. Your bike will rn somewhat normally. Good enough for a test ride, but not well enough for jetting checks.

.

 

[rapidray]

Without the filter the engine is lean enough that you could hurt the thing if you tried to ride it very hard. Ray.

 

[Darren GS450T]

Thanks guys.