Originally Posted by
supacha
Hi guys,
I use Tornado 25% fuel.
What I said the highest temperature was 117 C when we readjust the engine only for one lap.We run the engine at 100 to 105 C which is 220 deg F.
I don't think the engine was to lean, had lots of blue smoke coming out and it died always in a very slow corner...
When I disassembled the engine and saw the piston/sleeve I thought damn I got dirt into the engine...
So I started cleaning the crankcase, piston, sleeve and bearings. The carburetor looks clean, had only airfilter oil on the intake. During the cleaning I found fine metal shavings and heard that the bearing has excessive play...
At that time I removed already all the lubricant.
I contacted OS - still waiting for their feedback.
Michael
It is quite normal for bearings to fail, specially the rear.
If you are looking for answers why? It can be many factors, including being too rich. get new bearings, look on youtube how to change them (you must take of carby and all components and put in the oven and readh 150c and they can fall out or a small tap.
then warm up block and put back new "cold" bearings in.
Do not attempt to run the engine as it is.