low compression on wr400 1998


5 replies to this topic
  • sniper695

Posted April 18, 2009 - 06:02 PM

#1

i got my wr400 out of storage. i tried to start it, it was giving my trouble so i was using starter fluid. it would start and run good for a couple of seconds then stall. i tried spraying some carb cleaner in carb to clean it up put it back together and now it has very little compression. i can kick it over with compression release lever very easily, almost like a small 2 stroke. what could cause that?

  • tcmII

Posted April 19, 2009 - 06:45 PM

#2

Check the adjustment of the compression release lever and make sure the release at the cylinder head is not stuck.

  • Birdy426

Posted April 19, 2009 - 07:22 PM

#3

i can kick it over with compression release lever very easily, almost like a small 2 stroke. what could cause that?


I assume you mean "without" the compression release. If you are kicking with the compression release lever pulled, it should kick over very easily...

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  • sniper695

Posted April 19, 2009 - 07:49 PM

#4

sorry i meant with compression it is very very easy. without compression release pulled in it kids easily, it has some resistence but nothing like it should. before i had to bounce my whole weight to get engine to spin now i can do with my hand. the compression release moves at engine head. is that all i need to check or am i missing something?

  • sniper695

Posted April 20, 2009 - 04:34 PM

#5

anyone the compression release moves fine. i just happened between one minute and the next

  • juliman

Posted January 23, 2011 - 07:26 PM

#6

this is no use to you now, but next time takew out the plug and pour a small amount of oil down the hole, turn the engine over slowely, and the oil should seal the rings, bringing back compression




 
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