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Timberwolf87

98 Yamaha Timberwolf 250 won’t turn over

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Ok so I was cranking over my 98 Timberwolf and on the sixth pull it stopped won’t turn so I pulled crank cover off and tried turning it by han still won’t move so I tried turning it backwards and it moved piston went down back up and stopped again won’t move so turned it forward and piston goes down comes back up and stops. Can anyone tell me what could be causing this issue I don’t want to go buying something I don’t need.

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If it is stopping  at  very  close  to the top it  could  possibly  be  a valve is stuck full open  for some reason  and the  piston is hitting it. If you had the spark  plug out something  could have dropped in the  hole and  then  the  piston  jams between it and the head.

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Spark plug was in. I took it out and use a light to look In to see if there was anything. I took the cover off the air valve and it moves fine but haven’t taken off the exhaust valve cover yet

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Does it turn over ok with the plug out?   On my  Honda,  if I don't open the compression release I  can't  kick it  over  on the kick start ..  I  never thought  but on your pull start  there  may be an  automatic  compression release  that is not working.  It's  possible  compression  is stopping it.  Only a suggestion since I'm  not familiar with your Timberwolf.

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