- Fri Nov 26, 2021 2:46 am
#99041
I bought this bike with 4000 miles and I have put on another thousand. A couple days ago it broke the head off the exhaust valve at about 3900 RPM in 5th gear. I suspect the valve stuck open in the guide and the piston smacked the valve head and broke it off. It made quite a mess, making a big hole in the top of the piston. I will be upgrading to the 535 bore kit and a new cylinder head and upgrade valves. There were no shavings in the engine oil main sump but the suction screen had a lot of shavings on the outside of the filter.
Here is my question. Can I clean everything out well enough without removing the engine and splitting the crankcase? If I flush it with lots of kerosene, will that clean it out? Also, what would cause this to happen?
Any advise is appreciated.
Dan
Here is my question. Can I clean everything out well enough without removing the engine and splitting the crankcase? If I flush it with lots of kerosene, will that clean it out? Also, what would cause this to happen?
Any advise is appreciated.
Dan