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  1. #1

    How much variance in pop off between two carbs?

    I checked my pop off after rebuilding my carbs on my 98xp and one is 19 and the other is 22. I rejetted 167.5 and 85 with 2.0 needle and seat. I used a 95 gram spring. I tried a 80 gram spring at first and it popped off at 18 in the one carb so I just stuck with the 95's. Is 3 psi variance OK or could I use a 80 gram spring in the one carb that pops off at 22 to try to lower and match the 19 one? Is using to different springs OK? Thanks.


  2. #2
    SURFnTURF's Avatar
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    Swap the needle and seats over to the other carb and re test
    I always use the same spring rate in both carbs

  3. #3

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    Spec

    Quote Originally Posted by Billy98xp View Post
    I checked my pop off after rebuilding my carbs on my 98xp and one is 19 and the other is 22. I rejetted 167.5 and 85 with 2.0 needle and seat. I used a 95 gram spring. I tried a 80 gram spring at first and it popped off at 18 in the one carb so I just stuck with the 95's. Is 3 psi variance OK or could I use a 80 gram spring in the one carb that pops off at 22 to try to lower and match the 19 one? Is using to different springs OK? Thanks.
    Your 1998 XP should have a Pop-Off min of 19 and a max of 23. The test should be performed three times to obtain a valid reading.

    Make sure you are using a 95g Spring and a Valve seat of 2.0mm.

    Hope this helps,

    Vic

  4. #4

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    I like 2.0s with 65 gram springs with the open air elements. You can make some adjustment to springs or arms to dial the #s in to perfection.

  5. #5
    I got them to pop off at 21. Thanks

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