Yamaha FJ1200 ??????????

[5.0liter]

I have a customers 86 Yamaha FJ1200 and for some reason it is mixing gas with the oil and wanted to know if anyone has experienced this before.

[Tezzuk]

On Xjrs 1300 so baicly the same engin/bike its usally the vacume fule tap leaking or left or prime they have no off postion , you can get rebiuld kits but usally most just fit a pingle tap and blank of the vacuem take of on inlet rubber

thats the most common one and usally what people try 1st as it dont involve stripping down carbs

[5.0liter]

Thanks for the info!!!!!

[fj1289]

Another issue on these - especially as they get older is the o-ring around the needle seat will dry out and shrink or crack, letting fuel seep around the seat - it floods the float bowls and can puddle in the airbox and flow into the crank case through the vent pipe.

[5.0liter]