Question about 1992 Suzuki RGV 250 N

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Rgv 250n bike wont rev past 4000 rpm when hot, carbs ok , replaced cdi and some wireing, intermitent fault only happens when hot and feels like your running out of fuel then pickes up then dies again, wont goe past 4 grand, when under load wont go past 4 grand, when in neutral revs ok, any answers for my problem

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  • Louie  Role
    Louie Role May 11, 2010

    Hi and welcome to FixYa,

    Initially, pls confirm/consider and/or try that:


    • the CDI is an original Suziki PEI (Pointless Electric Ignition);

    • you might also check the regulator and the battery/connections. Overvoltage (when revved) would cause the PEI to clampdown to protect itself and therefore no ignition;

    • additionally, inspect for vacuum and/or air leaks.
    Check and perform preliminary visual or necessary inspection. Pls post back result(s). Good luck and Thank you for using FixYa.

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Check ur valves and the gaps, try checking ur spark pug gaps

Posted on Aug 12, 2009

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I've just bought a 2002 r6 it's not been used for about a year owner told me to get it serviced it revs up great but when driving has no power over 4000 rpm


Hi, Stephen if your bike has been sitting idle for months or years and you did not do any pre-storage maintenance I feel your pain it will probably have a dead battery and not want to start or if it starts it will idle and run poorly, here are the following steps necessary to complete in order to get your bike back to an acceptable running condition.
1. If your battery was 2-3 years old when you last had the bike running you should replace it.
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3. After charging remove the leads and let the battery sit for a couple of hours then check the battery voltage with a volt meter, you should have 12.5 volts or better, any readings in the 11 volt range you need to do a proper load test on the battery and replace as necessary, any readings in the 10 volt range you have a dead cell and replace the battery.
4. Drain and flush fuel tank, google " how to clean a motorcycle gas tank" find a couple forums to view the different options available.
5. Remove your air cleaner and clean and re-oil per Mfg. specifications.
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7. Remove fuel valve and filter disassemble and clean as necessary, remove fuel lines and replace with new ones.
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For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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http://www.r6-forum.com/forums/57-garage-mechanical-help/207210-r6-dies-4000-rpm.html
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http://www.r6messagenet.com/forums/pdf/99-02R6_Service_Manual.pdf

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I have a NC30 that has been standing for about a year, the only reason for that is CDI issues. I bought a De-restricted CDI from Japan, replaced the Spark plugs and checked all fuses and connections. I...


Check your CDI on the other bike is a good option. if it was perfect before the CDI change then the new CDI is the only variable.
Wont be shimming.the valves need to wear to change that setting, and the bike has been sitting.
Sounds like its sucking air after the carby once over, but the balancing would have picked that up.
But how did you balance them if its idling at 5000rpm?
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if you had cam overlap then it wouldnt start and when you pushed the starter if would smash the valves together, if it runs ok every where else then i would say its a crab fuel problem and at that rev range it would be pilot jets as the mains dont come into use at that rev range you should take your bike to your local dyno center and have them run it up they will sort you problem

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