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  1. #1
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    99 slx 1050 timing

    does anybody know for sure at what degree the timing base triggers the cdi??it ain't whats listed in the manual as the timing spec.its gonna be around 35-40 degrees and then the cdi retards from there.also does anybody know the what the the timing curve is for this ski.


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Does the service manual not list the 'static' timing specification?

    Mind you, if this is an updated ignition then the spec would be similar to the 2000 onwards Gen III ignitions. I seem to recall that the 2003 service manual had fairly complete info

  3. #3
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    ever actually do a static timing that was dead on when the engine fired up?the timing on the 3-1200 motors i've checked all triggered at .350" btdc.if you have access to the specs that shows what .350" btdc is in relation to degrees please post it,the factory service manual stops at 35 degrees at .308".using some logic it appears to be 37.5 degrees btdc.so the trigger happens at 37.5 degrees and the cdi retards the timing down to 23 btdc for the 1200.by swpping cdi's to say one programmed with a limited curve theres no need to retime as the cdi simply doesn't retard the timing as much.now heres why i'm asking this question.what does a 1050 trigger at????if it also is set to trigger at 37.5 degrees then that measurement will be different than the measurement on a 2mm longer stroke 1200.maybe a degree but if the trigger point of the 1050 is say 33 degrees then were talking quite a bit.the cdi # 4010379 curve list as 3000 at 23--5000-6250 at 10--and 6500 at 15.does the 1050 follow this pattern or does it vary quite a bit???if polaris doesn't make anymore 1200 cdi's i'd like to get a handle on how the 1050 stuff is actually going to be working in a 1200 or will the cdi's NEED to be reprogrammed to prevent some meltdowns or is the engine just going to lose a few ponies?some specific info is what i'm looking for,not just i threw a 1050 cdi in and it seems to be running o'kay

  4. #4
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    My guess would be since they use the same stators and flywheels, all the ignition sees are degrees of revolution. I spent a good amount of time on the phone this winter discussing the use of the 1050 CDI in the 1200 with Jay from Sharps, and he assured me that there was so little difference between the two that it wouldn't be worth reprogramming the 1050 CDI to a 379 curve.

  5. #5
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    still doesn't answer the question,what does the 1050 trigger at??

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    please correct me if i am wrong but isnt the timing on the 1050 18 degrees @ 3000 rpm then the cdi takes over from that base

  7. #7
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    thats incorrect,you can't advance timing before you've even triggered the cdi.the timing or trigger base is around 37 degrees btdc and the cdi uses rpm and calculations to RETARD the timing down to the curve preset by the programing of the cdi software.

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    Wouldn't it trigger the same if its using the same stator and flywheel? The only difference being the timing curve in the CDI???

  9. #9

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    what is the timing supposed to with the engine running at 3000 rpm

  10. #10
    Rasta Mon Condoms We Be Jammin!!!!! TxVirageTx's Avatar
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    rr44red you're missing the point entirely.bryan how do you know the 1050 and the 1200 trigger the same??have you found the info in any of the manuals??i know for a fact that all thee of my 1200's trigger at .350" btdc.haven't found a single place anywhere that states what the measurement equals to in degrees.if the 1050 timing is 18 btdc at 3000 and the 1200 is 23 btdc at 3000.you're timing is 5 degress less,if the 1050 triggers at say 34 degrees and the 1200 is 37,thats another 3 degrees less.so in this secenario simple swapping in a 1050 cdi into a 1200 could have you at 15 btdc at 3000 and a curve thats just as far off,unless you've retimed to get 23 at 3000.then what is the curve of the 1050 vs the 1200.have you checked the timing in the pro since the 1050 cdi was installed??what was it at 3000??18 btdc??if so that would steer me into believeing that the 700-1050-1200 flywheels were all triggered at around 37 btdc.

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