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Thread: changing 350x rev limiter

  1. #1
    blkstangman88's Avatar
    blkstangman88 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    changing 350x rev limiter

    so i was kinda curious how someone would go about lowering or raising the rev limit of the 350x?

  2. #2
    Join Date
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    There is no rev limit on a 350x.
    80s......185 atc, Yamaha tri-moto 200, 85 200x with tons of work
    90s......89 Suzuki quad racer 250 (raced 250 A class for 6 years, late 90s.. custom framed 250x with long travel shocks and a built 350x motor.... built Honda 110
    00s...... chomeoly framed 350 RX with all the goodies (thanks to my bro)
    2012.....Replaced the 350x motor for a 444cc YZ426
    WWW.HREATV.COM

  3. #3
    blkstangman88's Avatar
    blkstangman88 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    well that was a quick one lol

  4. #4
    Join Date
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    Your rev limiter for that stroked motor is your thumb

    People explored the 400EX CDI and it didn't appear to be an advantage, rather the opposite.
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

  5. #5
    blkstangman88's Avatar
    blkstangman88 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    HAHA DC, you knew exactly what i was thinking lol

    its all good,im not one to ride to the limiter anyways but stay in the power band, just getting all my eggs together and taking precautions. thanx buddy

  6. #6
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    You'll be fine, that motor will be plenty to satisfy what your wallet put out!
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

  7. #7
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    To have a rev limiter you would normally need an ECU

  8. #8
    bcredneck is offline I can fit a square peg in a round hole. Just give me a hammer and duct tape! Arm chair racerJust too addicted
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    they make limited rpm cdis to

  9. #9
    eyecekold1's Avatar
    eyecekold1 is offline Check my feedback before buying from me First time rider
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    Good to know the no rev limit thing. I was going to look into a performance CDI for my 350x. Its ported, polished, 12:1 piston, 400ex carb, super trapp pipe. k&n filter, stock cam, bore, valves and springs (gunna change that this off season). I run the dunes in 4-5 gear extremely easily. I can run 6th but it doesn't stop fast enough. Hit a witches eye in 6th I would be parting out my bike from a wheel chair.
    85 350x 12:1 piston and porting by "boosted96cobra"
    4 85 tecates 1 runs
    5 84 tecates none run
    1 84 Yamaha Zinger, mildly ported & polished, milled, bored .25 over finally running
    2 atc 90's just parts bikes
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    93 kx500
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  10. #10
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    I have used the 400ex cdi on several bikes, all with good results,

    Im not using the OEM box, but a DynaTek, or Sparks box. Both had very good restults over the stock 350x setup, but they will only work with a 86 electrical system, NOT THE 85 SYSTEM

  11. #11
    eyecekold1's Avatar
    eyecekold1 is offline Check my feedback before buying from me First time rider
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    Shame mine is an 85. I'm extremely happy with it. No one has ever ridden it and not been impressed.
    85 350x 12:1 piston and porting by "boosted96cobra"
    4 85 tecates 1 runs
    5 84 tecates none run
    1 84 Yamaha Zinger, mildly ported & polished, milled, bored .25 over finally running
    2 atc 90's just parts bikes
    00 rm250
    93 kx500
    2 Honda 200m parts bikes

  12. #12
    sittinguy's Avatar
    sittinguy is offline Titanium Balls Arm chair racerAt the back of the pack
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    I sent my CDI out to Curtis Sparks to be modified, and there is Definitly a difference. Mine is an 85, and I could be wrong but I always thought the stock CDI started retarding the timing around 8200 rpms. You have to get the heavy valve springs if you do it though.

    Lookin forward to more on this topic.

  13. #13
    sittinguy's Avatar
    sittinguy is offline Titanium Balls Arm chair racerAt the back of the pack
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    Does anybody know what they do to them to modify them?

    Mine just has a very small square cut into the back, and then they glued the cut out piece back in after they did the mod.

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