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KAF 300-C4 compression issues

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  #1  
Old 01-23-2019, 11:12 PM
Coondoggy's Avatar
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Default KAF 300-C4 compression issues

Measured compression is 75psi. Book says 118-178 psi.
New carb, air filter,etc. Engine will idle for days but go out and drive it and it will miss in the midrange, run fine at top end and foul a new plug within 15 minutes mostly when driven in mid range. Fouling is fuel not oil.
Is this all compression issues as this system has no adjustment for rich/lean issues?
Help someone😩
Coondoggy
 
  #2  
Old 01-27-2019, 08:13 PM
Rob9876's Avatar
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About the only active discussions on this forum revolve around KLX 250S bikes. You may have better luck at this forum:

Kawasaki ATV and Mule - Kawasaki Motorcycle Forums

or this one is even more focused:

https://www.kawieriders.com/forum/
 
  #3  
Old 10-27-2019, 04:44 PM
BirdDoc's Avatar
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Yes, you have compression issues. Time for a ring job and get that "pump" tightened up.
 
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