yamaha 1973 GT 80

 please can anyone help ? i have a 73  GT 80 has carb prob.! keeps
fouling plug ! need help with setting air/fuel/mix also  oil injector
system bypassed  ! fuel/oil  premixed  THANKS

 hogdawg wrote:

In addition to what Krusty said.

Of course check carb function first, but you could have a bad seal
between the case halves it could be letting transmission oil leak in or
the crank seal could be leaking.

I've had leaks like this in an alarming number of bikes I've rebuilt. If
you just grab the flywheel and can jiggle it, even a little, it is a
sign the bottom end/bearings/seals are going south.

Rick

 also dose it matter if the oil injector line is pluged or ?

hogdawg wrote:

 
hogdawg wrote: