2008 KTM 450 SX-F Logo
Posted on Mar 16, 2009

Wont start dropped bike onto me when hare and hounding bike allways ran great got it home about week later tried it again no luck took head off mud on valves cleaned the lot clinicley shimed timing spot on still wont start oil coming from breather

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  • Contributor 46 Answers
  • Posted on Mar 16, 2009
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Joined: Feb 14, 2009
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Hi,

Oil from the breather is an indicator of compression bypassing the rings. This causes sump compression.
Cause of the problem is worn rings.
You need to conduct a compression test, if the compression is low then rings are probably the cause of the bike not starting.

Cheers

Jon

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http://www.carlsalter.com/download.asp?fileid=072111110100097095067066082095054048048070051095039057053045039057054095083101114118105099101095077097110117097108046114097114
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