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Thread: 1978 SRX racing tips

  1. #1


    Question 1978 SRX racing tips

    hey guys im looking to race a 1978 srx 440 and its gonna be my first time ever racing so im looking for any tips i can get. the sled is bone stock with the reg. stock yamaha clutch and gearing. can anyone tell me anything about racing one of these, like what set-ups they use or any of their settings?? (gearing, clutching, studs, etc.) the sled will most likely be drag raced, not oval raced. if anyone has any racing parts or go-fast goodies they would like to sell or think would improve my sled please please let me know!!!

  2. #2
    Senior Member Stock snopro's Avatar
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    with drag racing your hole shot is vital. you will need to set your engagment to 5000-5500 rpm to get a good holeshot.
    from there, i'd i start by reducing weight. aluminum skis, aftermarket lightweight pipes, remove stock airbox etc, unless your running it in superstock racing classes.
    8F2 YEAH BABY

    (2) '77 SRX 440's
    '75 GPX 433

  3. #3


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    thanks...what kinda clutch do you recommend? a comet? and would you recommend K and N filters in place of the airbox?

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    DUDE, DUDE THE FOLLOWING:
    76 SRX PIPES
    FIND .40 mm CARBS
    RUN A COMET WITH THE SET-UP I GAVE YA
    17-31 GEARING.
    120 1'' chisels
    this sled will fly!! 3:16 (TONY)

  5. #5
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    And No K&n Stuff!! Run Stock Airbox!! 3:16

  6. #6
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    Default Racing days......

    A comet clutch is not manditory. We raced a '77 many years ago and stayed with the stock Yamaha primary clutch. Mattet of fact we had 3 or 4 outer halfs, each set up a little different to see what was going to work that day and tweek'em from there. Same with the seconday/driven clutch. For carbs we ran 40's and 44's, set up to run w/o air box but those kinda things will be dictated in the rules of the class your gonna run it. For ski's we had a set offa an old Rupp Nitro F/A, very small and lighter than even the aluminum ones that came on the '77. We ran mostly mod and open mod classes. Wild porting and AAEN pipes, engagement for the "extreme" ported cylinders/heads set up was 6500, some times closer to 7,000rpm. Every day, every track is gonna be different. Plan on spending lots of time "tuning" your sled. Keep a log of weather conditions, track conditions, clutch, carb and , gearing and even belts for future refference. Ahhh, I miss the "good old days!"
    *Currenty have: *New this year/2017! - 2006 Vector GT and a 2002 Vmax 700! - Also have, soon to part with: 2-2001 Phazer 500's, 2001 Venture 500
    *Past sleds in my life : 1970 Rupp Sno-Sport (Our first sled!), 1972 TNT 440 (Our first FAST sled!), 1972 SL292, 1973 SR292, 1973 SR433, 1974 GPX433, 1974 GPX338, 1975 AC 440"Z", 1975 Rupp Nitro II 440, 1976 Rupp Nitro 440, 1977 SRX, 1978 Exciter, 1980 SRX, 1980 Skidoo Snopro, 1983 Vmax, 1991 Phazer, 1990 Sno-Sport.

  7. #7


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    hey thanks alot guys...we're on our way. have got comet clutch setup that yammiegod told me to put on, we got the studs, and im in the process of finding the .40 mil carbs. the thing im gonna need your help for is finding a decent set of 1976 pipes...if anyone has any leads on anything...let me know!!!

  8. #8
    Senior Member Stock snopro's Avatar
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    good luck. this stuff is getting hard to come buy.
    it would probly be much easier to buy a set of Aaen pipes.
    8F2 YEAH BABY

    (2) '77 SRX 440's
    '75 GPX 433

  9. #9
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    Quote Originally Posted by YAMMIEGOD3:16 View Post
    DUDE, DUDE THE FOLLOWING:
    76 SRX PIPES
    FIND .40 mm CARBS
    RUN A COMET WITH THE SET-UP I GAVE YA
    17-31 GEARING.
    120 1'' chisels
    this sled will fly!! 3:16 (TONY)
    Want to share the clutch setup
    Last edited by srx440b; 11-17-2018 at 09:36 AM.
    Robert
    srx440b
    sleds I've owned: 1978 srx 440, 1978 ssr440b,1972 ext440, 1975 el tigre 340, 1974 el tigre 400, 1972 tx 440, 1973 tnt 340 fa, 1972 cheetah 440.

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