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Recent content by Studroes144

  1. Studroes144

    Losing RPM and not holding normal top speed

    Cannondale you hit the nail on the head, they handle so well that they just feel slow. A very deceiving sled. Your explanation of the 8jp belt was also very accurate. The belt itself was the issue, the cheapest alternative was the 8dn which kept performance consistent. That same consistent...
  2. Studroes144

    Losing RPM and not holding normal top speed

    Yamaha clutches are designed so the belt will not reach the top. Machining can be done to the primary to achieve this..but also will need to do the secondary as well because if your primary shifts further than what your secondary does you’ll have bad problems. Also, when considering getting...
  3. Studroes144

    Losing RPM and not holding normal top speed

    Keep in mind the width of different belts. 8dn and 8jp are same width. I’ve had great luck with gates carbon belt in the 8jp length which is a bit wider than the Yamaha belts. Not sure how other aftermarket belts compare. My biggest reasons for always going back to the gates belt is because of...
  4. Studroes144

    Viper Clutch Noise

    Can only do so much. I run an apex primary on mine which has set screws to hold the pins in place and there’s still some rattle noise. The harmonics of the 3 cylinder engine is a big factor.
  5. Studroes144

    Front shock spring

    I think the sleds can benefit from a stiffer spring, but that one is just very stiff. Strangely enough I also tried that spring in my 129” cat 800 and it worked well in that. I ended up settling on the stingray spring in that sled tho since it gave a better balance on ride quality and comfort...
  6. Studroes144

    Front shock spring

    I tried that spring on my ltx and found it to be extremely stiff for any type of leisurely trail riding. Just keep in mind that that particular spring is a 160/260# rate vs stock 135#..so not only a stiffer starting rate but much stiffer once compressed. For extremely aggressive riding I can see...
  7. Studroes144

    Clutching Hurricane 240 kit

    I run 84 grams at 12 psi with a gwg primary spring. Trail riding from 800’ up to 1500’ elevation.
  8. Studroes144

    Breaking Secondary Springs

    Hard to tell I guess if that’s normal or not. When my helix is bolted on (no spring installed) there is no measurable play at all on the bushing..so I guess that’s a possibility. Do you have the spring in the proper holes/settings and twisting the helix clockwise when reinstalling it?
  9. Studroes144

    Breaking Secondary Springs

    Check for Any type of binding at all, whether it be on the shaft or maybe some slag left behind from the castings.
  10. Studroes144

    Breaking Secondary Springs

    I’d start by putting your secondary clutch together but without the spring in. Duplicate the shifting process by hand and make sure it’s shifting smoothly and not getting bound up someplace.
  11. Studroes144

    Clutch rattle fix?

    On an apex clutch they have Allen head set screws that you can tight up on the roller bushing just like what’s on the weight bushing, the viper clutch does not have the set screws on the roller bushing. I run a complete apex primary on my viper, no clutch rattle at all. You can add a washer...
  12. Studroes144

    Head gasket failure 2014 turbo viper

    Either we got 2 guys with a serious case of fat thumbs or auto correct is trying to tell us something lol. I was able to do some dyno testing a few years back after I had the engine done on mine. I have larger injectors as well as a pc5 pti, I use Ulmer’s mapping and it’s spot on all the time...
  13. Studroes144

    14 MPI Viper RPM and Top speed

    Before you do too much more I’ll give one big tip. If you’re doing long top speed runs and can’t keep the sled higher in the revs, don’t keep holding it wide open. At 8200 you’re making full boost but since it’s low you’re creating a lot of cylinder pressure..not a good combination in a turbo...
  14. Studroes144

    Are any of our Viper guys from Old Forge NY or close??

    Viper came from the factory with tunnel protectors. One of the things I’d be more concerned about is how it starts both hot and cold. Ask him some questions on that, have him send you videos of a couple cold starts and a couple warm starts. Shouldn’t be hard to do a walk around video just...
  15. Studroes144

    Are any of our Viper guys from Old Forge NY or close??

    Tug hill region here, hour from old forge.


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