Oil Leak

[sapperk9]

I have an oil leak, only when running, right under the starter motor, its from the crankcase split, as far as I can tell. Any offers of solutions other than a complete motor tear down and reseal of crankcase halves?

Cheers...

[Bill Jurgenson]

couple of possibilities there but the joint of the crankcase is not at all probable.
1) crankcase vent hose, that black plastic hose about 1/2"Ø cracked or just very loose;
2) oiltank vent hose, in front of the above and about 3/8" Ø same problems;
3) Oil return line loose or its O-ring bad or both, it is under the starter towards the back, and is held by two M inbus screws.
4) to the right of the first item, there is a large black plastic plug in the crankcase. This has been known to crack or even to blow out.

[Anders]

While speaking of leaking hoses, MuZ did not use the best quality avaliable to say the least.
I highly recommend to check all hoses and especially those in contact with oil for cracks and replace if needed.

I had to replace most breather and oil lines when my -95 Skorpion was no more than 5 years old, first clue was a serious oil spill on my rear tire from the return line to the oil tank, could have ended in tears.

[sapperk9]

Thanks gents, I'll scrutinise the machine next week, the starter motor is off but I'm off to a birthday party for my Guzzi dealer on Sunday.

http://www.thunderbikes.com.au/

Cheers

Jim