Hello all,

I am after a little advise / answers if possible.

I have recently picked up a 1997 Thundercat with 28000 genuine miles on it.

I have done approx 100 miles on it so far, but each time i have riden it, the next morning there has been an oil mark on the garage floor from the air box drain hose (about the size of a 50 pence peice).

Can someone tell me WHY!!!!!

Hi,

The oil would be coming from your engine breather.

The three main reasons for this are too much oil in crankcase, a well overdue oil change or a very worn motor.

If the mileage is correct and the bike has been reasonably maintained the motor should be OK.

Change the oil and filter. Use a good quality 20-50 oil and do not overfill.

Pull airbox apart and clean up excess oil.

Check plugs for oily residue and clean or replace.

If problem continues after another 100 miles have a mechanic check the compression.

Regards.