Question about 2004 Yamaha YZ 250 F

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Cant start my 2004 80 ws raptor

The starter works but I cant start it looks like that is no compreshin in the cylinder when I crank the engine but the piston is moving OK But thet is wary litel comresin inside the cylinder.
This is a 2004 yamaha raptor YFM 80 WS model

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  • vtrktrmn May 11, 2010

    Do a compression test and that way we will know for sure what direction to go, If you have been racing this bike it is possible that while down shifting it got over revved and bent the valves.... I am sorry to say I have done this myself.....

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  • Master
  • 1,167 Answers

Buddy sounds like your piston rings have wore or broken strip the barrel off and replace rings making sure you put oil on them when you install

Posted on Sep 08, 2009

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Suggest get battery tested at a battery seller to see if battery is really ok .
The click is most likely the solenoid on the starter motor clicking on.
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wow no year car stated... nor engine....
we cant answer those with out the below:
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that be first.
we cant guess that... ever.
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When I try to start the car it wont start but all the lights are . what wrong?


what lights. do tell> we cant guess which of 30 lamps blink.

the 95 , what engine, (size) and cylinder count./
we can not guess that either,

cranks but no start,
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Craftsman Tiller 917.298560 pull cord will not move but rewind starter is ok when removed from the engine. Flywheel will not move when rewind starter is off. It worked one minute but not the next or after....


The Flywheel or the piston may not be frozen up, unless it ran without much oil to the cylinder. After not being used for a while it may have locked itself in place by hitting the old dry spot in the cylinder. Remove the spark plug and spray some lite oil like wd-40 into the cylinder and move the flywheel by hand back and forth until it starts moving freely again. Also would be a good idea to change the old oil. When oil sits up it can collect moisture and cause dilution of the oil and score the cylinder walls at start up and damage the engine. If you cannot move the flywheel by hand, try using a strap wrench. Also a good idea to wear gloves while doing this procedure.

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Will not crank, starter works fine. 40 hp evinrude, seems like the engine is locked up but the pistons do move a little when i move it by hand, need answer.


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The engine was to much compreshin when you try to crank the starter makes a funny sound and does not kick over but when you take off the the cover to thers no compreshen it spins


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I have a 2001 ford focus has no compression in any of the cycl we checked the timing belt and all no damage everything looks good but no compression in engine. Was driving down road the other day it...


Hello, I have read about the Keyways in the crank and camshafts shearing off. If you disconnect the Battery and take out a sparkplug, you can turn the engine with a breaker bar. Then put a probe into the sparkplug hole and you should be able to feel the piston coming up in the cylinder. If the piston does not move you can start disassembling the front cover to check the Keyway on the crank.

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Another potential problem much easier to fix is the Starter bendix. If you only hear the Starter cranking without a load, was the engine turning? The Starter gear could fail and the starter will just spin while the engine does nothing.

Would be interested in the outcome of this problem.

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