2010 Kx 450

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Mar 16, 2015
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#1
i bought a kx 450f knowing the crank was shot, went back with reman crank and stock piston , to me it seems like it has no compression by the feel of the kick , timing is dead on and and I can kick it about 8 times it'll backfire give it a little gas and it just back fires less than 8 kicks , Any ideas ? I'm stumped also it only seems to be firing about every three kicks
 
Joined
Jul 27, 1999
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#2
What you are describing sounds like the cam timing is incorrect.
 
- a d v e r t i s e m e n t -

Joined
Jul 27, 1999
Messages
22,457
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11,187
Location
Chicago
#4
The valves never closing properly would certainly do it.