NRG Reving Problem

Discussion in 'The Workshop' started by ricky barrett, Mar 26, 2012.

  1. ricky barrett

    ricky barrett New Member

    Messages:
    12
    Hello all was wondering if anyone could help, I have a NRG Power and for the past 6 months my revs are getting lower and lower and have now stoped and stayed at 7k, it used to rev to 9k and do 50 on a flat but now only revs to 7k and does 30-35 ish on a flat. It has a Mollosi veriator and clutch spring on it , has 7.2g Mollosi rollers(replaced already with same weight as before) and a new belt. (think the belt was the same size can't remember now) and also has a sports pipe and mollisi 70cc kit if that is relevent,if anyone has any other questions or suggestions fill free to let me know
    Many thanks
    Ricky
     
  2. revolution

    revolution Member

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    166
    has the carb been upjetted to suit the pipe and cylinder kit?
     
  3. ricky barrett

    ricky barrett New Member

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    12
    Ye it has be up jetted to a 62 ages ago even before the Reving problem appeared.
     
  4. ramo

    ramo GoldMember

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    1,572
    If it was running fine before (?) and its gradually got bad I doubt its set up related.

    Check compression with a tester? New plug?
     
  5. ricky barrett

    ricky barrett New Member

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    12
    Ye I was running fine before, and got a new plug and done a compression check got 100psi witch I was told was good.
     
  6. oliwest

    oliwest Member

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    503
    Rides:
    aerox road legal pit
    Mines doing exact same! Minevonly does 40 at 7000 rpm used to rev to just over 9000rpm is your accelerayion getting worse?
     
  7. ricky barrett

    ricky barrett New Member

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    12
    Erm slightly worse but not that bad,
     
  8. ramo

    ramo GoldMember

    Messages:
    1,572
    Are the rollers still good also?
     
  9. ricky barrett

    ricky barrett New Member

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    12
    Yes replaced them with the same weight that came out
     
  10. PPNRG

    PPNRG New Member

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    21
    Mines doing the same thing, I thought it needed a belt and roller change. Do your bikes pull back at speed? Asif you're riding with the brake on?
    As if it can't get in to a high enough "gear" or is trying to lower the "gear"
    Are they idling okay from cold?

    Could it be the mixture screw need resetting?
     
  11. oliwest

    oliwest Member

    Messages:
    503
    Rides:
    aerox road legal pit
    Yeah mines doing same mate an nah dont think it is ive been messing with mine for past few weeks lol. My mates screwed my idle screw all the way in at lunch as a joke an now its revving to 8000 lol
     
  12. PPNRG

    PPNRG New Member

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    21
    Please don't quote me on this, as its what a piaggio dealer in my area told me it could be the CDI the spark plug or its not getting enough fuel just changed my plug its made no difference so I'm guessing its the CDI
     
  13. oliwest

    oliwest Member

    Messages:
    503
    Rides:
    aerox road legal pit
    I tried a different plug ht cap an lead an all never made a difference. Changed my jet to let more fuel through an it doesnt change? Just uses fuel faster lol.

    Im going to change my crank seal as its leaking so that might cause it to loose power?
     
  14. ricky barrett

    ricky barrett New Member

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    12
    How easy are crank seals to change , is it engine in half job?
     
  15. oliwest

    oliwest Member

    Messages:
    503
    Rides:
    aerox road legal pit
    Yep its crank seals mechanic said its lacking power as theres compression escaping an as mine have compleatly gone my cariator an belt ar coverd in 2 stroke so im going to order them tomorrow :) an i was told i need to screw a screw into the seal an jus pull it out lube new one an slot it back in
     

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