new top end kick start wont move KXF250 2017

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7/30/2021 4:44 AM

I just installed a new top end, cylinder, cams, piston. I put it together and the kick start went half down and then all the way up and will not move any more.

Could it be the cam clearance?

or did i over tighten the cam holder?

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7/30/2021 5:04 AM

Piston may be in backwards and valves are hitting the piston

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7/30/2021 5:15 AM

two larger circles on the piston are in the back smaller are on the exhaust side.

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7/30/2021 6:04 AM

I just went and was able to turn the flywheel nut. I could hear the compression out of the exhaust. like a slow kick start. However the kickstart wont budge.

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7/30/2021 6:52 AM

Did you lock the cam chain tensioner before install?

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7/30/2021 8:00 AM

Timing off, piston hitting valves. Double check timing marks on crank and cams.

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Powerband in every gear !

7/30/2021 12:15 PM

Timing is off
Piston in backwards
Doesnt take much for it to not work. One tooth on the cam chain off and it will touch

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Gone:
2006 CRF230F
2008 KTM 200 XC
2017 KTM 250 SX
2019 CRF250R
Current: 2021 YZ250F

7/31/2021 4:18 AM

Make sure the marks on kick start gear aligned/timed were they should be
for full rotation

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