alexm2816
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Hopefully everyone is out riding and I can get some answers Monday!
I have the 58g thunder products kit installed on a MPI equipped viper (2016 LTX) with about 1100 miles on it. I had been running clutching from the shop I bought the sled at but it felt heavy and I saw a deal on a used big venom kit.
I put the heavy hitters in with the full set screw, and just a steel 3/8 to feel how much weight to add figuring I'd bounce off the limiter and the sled will only hit 8300 rpm and does 90...
Do I keep taking weight out? Something doesn't feel right. The secondary is set up with the kit spring in the 6-1 slots.
Any tips or thoughts on what's up? Snow was loose but if anything I think that would put engine speed up?
Thanks all for any insight. Ive done weight swaps and spring swaps before but it's been a minute or 2 and I'm confident I'm doing something silly and I'd like to avoid banging my head into the wall!
I have the 58g thunder products kit installed on a MPI equipped viper (2016 LTX) with about 1100 miles on it. I had been running clutching from the shop I bought the sled at but it felt heavy and I saw a deal on a used big venom kit.
I put the heavy hitters in with the full set screw, and just a steel 3/8 to feel how much weight to add figuring I'd bounce off the limiter and the sled will only hit 8300 rpm and does 90...
Do I keep taking weight out? Something doesn't feel right. The secondary is set up with the kit spring in the 6-1 slots.
Any tips or thoughts on what's up? Snow was loose but if anything I think that would put engine speed up?
Thanks all for any insight. Ive done weight swaps and spring swaps before but it's been a minute or 2 and I'm confident I'm doing something silly and I'd like to avoid banging my head into the wall!
Last edited:


murdered141
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- Yamaha sr viper 15 ltx dx, mpi 190 turbo, straight line header, 38" mtx front end, mtx steering, mtx seat, xtx 141" skid and 2.25" power claw track
2019 sidewinder xtx le, sleeping for now
Which primary and secondary spring are you running, also where is the 3/8 bolt, tip or mid?
alexm2816
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Blue silver blue on the primary (stock I think) and the BV secondary spring. Not sure of the specs .Which primary and secondary spring are you running, also where is the 3/8 bolt, tip or mid?
I had a 3/8 bolt in the tip and mid.
I didn't pull them out to see what no weight would do but I can. Shagman made some recommendations and this is less weight than that even. Feels like I'm missing something .
Thanks!
alexm2816
Expert
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- SE Wisconsin
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- Snowmobile
- 2016 SR Viper LTX-DX Turbo
Looks like i'll be trying some new springs in the primary and secondary and see where that gets me.
Has anyone ever had a throttle position issue where WOT isn't WOT? This is gonna keep me up at night
Has anyone ever had a throttle position issue where WOT isn't WOT? This is gonna keep me up at night

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