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Thread: Is a powervalve worth rebuilding?

  1. #16
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    10th December 2009 - 22:42
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    ...i can get a multi fit tool that makes torks fit in the space where the powerband sits ...i think they were being made under licence in Nepal by Tibetan monks as a bit of a trade off between themselves and them there Maoist types that dont get on well with them...but I dont agree with the yak butter lube system they recommend..

  2. #17
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    3rd December 2010 - 21:37
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    a mechanic i showed the engine said it needs new one........
    even it moves , just stiff.
    the broken piece is easily available on ebay.......
    dont know who to listen now , the mechanic or you guys

  3. #18
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    9th June 2009 - 08:23
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    Quote Originally Posted by CAMSec View Post
    ...i can get a multi fit tool that makes torks fit in the space where the powerband sits ...i think they were being made under licence in Nepal by Tibetan monks as a bit of a trade off between themselves and them there Maoist types that dont get on well with them...but I dont agree with the yak butter lube system they recommend..
    They aren't that good though, they are turning up metric torks on imperial lathes.
    "Your talent determines what you can do. Your motivation determines how much you are willing to do. Your attitude determines how well you do it."
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  4. #19
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    3rd December 2010 - 21:37
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    the broken piece is part of what is called power valve governor.....

  5. #20
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    25th March 2004 - 17:22
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    Quote Originally Posted by glukasil View Post
    a mechanic i showed the engine said it needs new one........
    even it moves , just stiff.
    the broken piece is easily available on ebay.......
    dont know who to listen now , the mechanic or you guys
    Depends; what do you want to believe? The governor is a device to change rotational speed into a linear movement using centrifugal force. So what is the rest of the system like in the barrel? Take it apart & clean/inspect it. May as well measure the ring end gap while you are there & check for any other damage. Not looking won't make it any more reliable.
    Don't you look at my accountant.
    He's the only one I've got.

  6. #21
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    29th October 2005 - 16:12
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    Quote Originally Posted by F5 Dave View Post
    Depends; what do you want to believe? The governor is a device to change rotational speed into a linear movement using centrifugal force. So what is the rest of the system like in the barrel? Take it apart & clean/inspect it. May as well measure the ring end gap while you are there & check for any other damage. Not looking won't make it any more reliable.
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  7. #22
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    10th December 2009 - 22:42
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    ...i know nussing about anything to do with mental turks smelling of imperial leather..

  8. #23
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    9th May 2007 - 16:10
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    Quote Originally Posted by glukasil View Post
    the broken piece is easily available on ebay.......
    Get it, Strip clean and reassemble power valve assembly (Barrel and head off) Check piston and rings. Reassemble and enjoy. Easy as that.

    Oh and you'll need base and head gaskets, may as well just get a top end set and give it a birthday.

    Is it a 200 or 250?

  9. #24
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    10th December 2009 - 22:42
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    .....see...easy...

  10. #25
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    3rd December 2010 - 21:37
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    thanx guys...........
    the problem is i have never taken apart engine.........no special tools or knowledge.....

    worked a lot with jetski and now bikes but strictly no engines....... i mean when it comes to crankes , pistons , rings , gearboxes

    it is why i had to go to mechanic.............

  11. #26
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    28th November 2007 - 13:41
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    If you are real tight you could free it up buy removing the expansion chamber and spraying carb clean at the valve assembly. you should also be able to clean the other half from the inspection panel on the side of the barrel.

    As for the broken rod that pushes the valve you may still need to remove gear box cover.

    Jet skis are much worse then MX bikes. Hoses and shit going every where i have 3 in my shed that are in stages of rebuild

  12. #27
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    3rd December 2010 - 21:37
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    i have bought the governor from ebay , will have it soon......
    will clean the valve with crc/dw40 for sure - it is still moving but stiff.........

    actually , how easy it suppose to move if it is ok?

    thanx a lot

  13. #28
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    10th December 2009 - 22:42
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    ....i feel I must apologise for being a twat,... carry on glukasil... welcome to KB...

  14. #29
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    26th April 2011 - 08:45
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    I bought a 2000 cr250 around a year ago, from a guy who said it had heaps of porting work done and it went like a cut cat. I thought it went ok, but nothing spectacular,i got it for a very good price in the end, pulled the barrel off and replaced the piston and rings, and yes it had had porting work done,a mate noticed that the "crows foot" that connects the govener to the powervalve was broken and valve stuck closed (the last owner had the foot in wrong place, and torked the barrel down onto it, breaking it) put new foot in and connected it up properly,pulled power valve down and cleaned with white spirits, what a difference, now it DOES go like a cut cat!!

  15. #30
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    28th November 2007 - 13:41
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    The valve should be nearly friction less.

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