Today I had my second race with the Moto.
I installed a gutted toaster exhaust on the Moto, coz the FMF is to loud, even with the quiet-core. So I had less HP. But that didn't make any difference.
Free practice went very good.
First moto did not go very good. About 20 quads at the start. I had a good start and had a top 10 position after a few corners. But about half way in the first lap I heard loud noises from the engine and then it stalled. It did not seize. I did not try to start it and pushed it of the track back to the trailer.
I removed the flywheel cover and then I saw that the flywheel has 3 big cracks in it. Next thing I noticed was that the flywheel is lose, but it's not lose on the crank.... so I think my crankashaft broke....
Gonna tear the engine apart tomorrow.
Second race with the Moto
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- Joined: Wed Mar 10, 2021 10:41 pm
Got the engine apart now. Also took some pictures, will upload later today.
The crank broke in half as I thought.
Some other things I noticed are that the piston hit the head and also hit one exhaust valve.
And the scavange pump for the head broke, something got in there. Looks like maybe a piece from a valve spring (there is a topic about that somewere here).
So I'm also gonna do a head rebuild...
I got my next race next saturday, and my spare engine is not done yet...
bummer
The crank broke in half as I thought.
Some other things I noticed are that the piston hit the head and also hit one exhaust valve.
And the scavange pump for the head broke, something got in there. Looks like maybe a piece from a valve spring (there is a topic about that somewere here).
So I'm also gonna do a head rebuild...
I got my next race next saturday, and my spare engine is not done yet...
bummer
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- Posts: 0
- Joined: Wed Mar 10, 2021 10:41 pm