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You should do some research over on the Yamaha jet boat forums. I’ve seen a few there. I believe their upper trim level models come with push button start from the factory.

I tried almost everything that has been mentioned here to solve the darting issue with my son's Phazer. And I'm a big fan of doing whatever possible with stock parts to get a sled to handle and perform the way the rider likes. Whereas some of these things did help, it didn't completely solve...

Yep. The entire rear torque arm is up-side-down. Flipping it over will move the upper shock mount to where it should be. The torsion spring perches (low/med/hi blocks) are also on the wrong side, which has me thinking the torque arm is up-side-down.

Your entire rear torque are is up-side-down.

The procedure I laid out above is specifically for the RTX (129" skid). The LTX (137" skid) had a different design for the rear shock. On the RTX model, the two mounting points to the rod parallel to the rear shock are completely separate from the shock itself. On the LTX model, the lower...

Here's a trick I posted in the Viper section. It was directed towards the 129 models, but I think it may also work on the 137. Trick doesn't require ratchet strap. https://ty4stroke.com/threads/rear-shock.148635/#post-1369196

Pretty neat video. It would be really cool if you could get a video of the clutches, synchronized with a video of the speed/rpm. Then you could really see how the clutches are shifting relative to the speed and rpm.

Couple of issues I see with the seat for long rides having ridden my son's a few times: - not much foam to the seat - narrow - the back end is sloped to much ... as you ride it's hard to stretch out from time to time as the slope keeps pushing you forward back to the same spot - to low for...

https://ty4stroke.com/threads/f-s-arctic-cat-magnetic-tether-harness-for-older-sleds.154927/#post-1455143

I found it. 2017 Amsnow shootout. Here's a screen shot of the published wet weights. Sidewinder is 40lbs more than a turbo Viper.

It's not 75lbs, but it's close. There was an issue of American Snowmobiler that published the following wet weights (somebody please correct me if I'm wrong, going off memory here) .... Sidewinder RTX = 670 .... Viper LTX w/ MPI turbo = 630. Knowing that the turbo adds roughly 20lbs to a stock...

You should check the straightness of the jackshaft. When the bearing behind the secondary on my Viper cooked, it must have got super hot. Hot enough for the shaft to bend slightly right where the bearing race was. I didn't notice it right away until I had the new bearing installed and gave...

I don’t think they are worth the premium price.

If you want a stock looking CAI for your trail Sidewinder ... Just go get the intake parts from the mountain sleds. They pull their intake through the dash pod.

For what it's worth ... I don't have a Sidewinder. But I had an MPI Turbo Viper RTX as my brother also did (same sleds). My brother geared his up to the XTX gearing (21/41) as most people do when adding a turbo to the Viper. I left mine at the stock 24/50. My brother's sled with the taller...

Poo doesn't have a chaincase drain either. But the case cover is super easy to take off and the drain out of the plastics is clean.

Engine reliability is still on par. Everything else around it performs better than the traditional Yamaha, but does not have the traditional Yamaha reliability.

Last year (model year 2019) Cat had the ZR7000 available with the updated plastics. Wouldn't the new Viper simply be just that?

what @rtx moose is referring to is 3-cyl engine used on the Yamaha jet boats. There is a 1049cc 3-cyl engine used on some of the 21-ft boats that is referred to as the TR1 engine used since about 2010. It is essentially the old Nytro motor converted for marine use. The TR1 engine replaced the...

The 1049 was really dead with the Nytro. The engine was never the same when it was put in the Viper.