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Post by katt on Jul 20, 2018 23:49:41 GMT -5
After i changed spark plug it worked like new no problem full power everything was good until next day i stopped on a light and RPM slowly went to zero and it did not start after that.
Starter works weird like spins too easy and makes different sound than usual.
Another problem when i use kick stand its too light also and i cannot find position when its very hard, all 10 presses on kickstart are same very lite.
Noise problem i had was probably chain got stretched and now its got broken will check tomorrow morning.
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Post by KSR Moto on Jul 21, 2018 4:13:17 GMT -5
Stuck valve, chain failure, broken ring... I once torqed my spark plug too hard and it fell of leaving only the threads in my cyl head
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Post by katt on Jul 21, 2018 15:07:15 GMT -5
What i checked so far,
Spark is okay.
Took valve cover off cam chain is okay, it was not super tense, but was fine.
From what i can tell there's compression, but i cannot measure it my compression gauge has different thread than M10, when i put my finger in spark plug hole i can feel a push of air.
Visually intake valve working good and not broken.
Exhaust valve i can only see top part but it also works because air comes out of the exhaust pipe when i turn by hand.
Dunno if i should dig any further, could it be a carb problem?
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Post by katt on Jul 21, 2018 17:02:01 GMT -5
What's the next thing i can check?
Piston rings or valves are good. There's a lot of build up on the piston however there's no scuffing on the piston sleeve.
There's brake in gasket and some buildup outside the engine, however this was not a main problem i assume.
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Post by katt on Jul 21, 2018 21:35:50 GMT -5
I cleaned the piston and put it all back together then disconnected petcoc and run fuel directly from tank and it works again! doh, i know how to install bore kit now lol.
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Post by katt on Jul 22, 2018 11:36:23 GMT -5
What caused carbon buildup on my piston, is it because of incorrect mixture?
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