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STM aggressive profile, same weights I use in a Yamaha.

I just went and looked in my notes, this was a stock 2024 T-Cat but has a 1-1/2" track studded. Used a 85/225 primary spring & 59 gram weights, stock secondary, stock belt.

And the best thing you could do with that 35/39 is take it off and throw it into the bottom of your local lake or river......

Yamaha still offers the OEM 35 degree helix, even today. 2019 and newer sleds come with a 35/39. OEM helix are marked, but you've got to be careful because some 2019 & 2020 models are ink stamped rather than marked like normal. In 2017 & 2018 the Sidewinder came with a 8KC50 (35 degree...

Rubber o-ring, I've done lots without replacing or using any Yamabond.

Dalton helix will match OEM Yamaha angles. STM will be 6 degrees steeper. If you bought a Dalton 35, it will shift virtually the same as OEM. If you buy a STM 35, it will shift closer to a 41 degree angle.

I've been using STM weights since 2004, when Rick @ Advant-Edge closed down, we asked STM to make our helix's as well. I can call or send a text and have anything I need in a day or 2 is really why.

Sorry, I should have stated STM Yamaha helix angles vs OEM Yamaha helix angle. If you use a STM 39/35 helix on a Sidewinder secondary, it will shift more like a 45/41. The angles don't match an OEM Yamaha Sidewinder helix. Not sure how that even happened, since I sent them the first...

Also, I just screen recorded a few of my Facebook posts, will try to post to youtube as I get some free time.

My Yamaha weights will bolt directly into the ADAPT clutch and I have used them, but only on a stocker. The next sled I'm doing I will be using my clutching in the ADAPT primary with Cat secondary to start out with (MC Xpress large turbo setup, 350 hp on pump gas). Then comparing TAPP with Cat...

My clutch recipe has changed in the last few years. I have gone to an aggressive profile matched with my soft primary spring, steep helix, and stiff secondary spring. The results = grabbing the belt at 320 hp with only 67-68 total grams.

Just the peak was the difference otherwise all was virtually the same.

Long story short.....I did 60 miles worth of dyno runs, 156 recorded runs in total, in two days. PEFI Stage 4 setup with 3" muffler. My Yamaha clutching setup was the best overall, but all were very close, like close enough that there was a slight difference at the peak horsepower number on...

Quick over view video... https://www.facebook.com/share/v/1CXWRWuGRq/

Tell me if this lets you see them..... https://www.facebook.com/share/v/17CV6AKxz2/

Testing to see if this lets you see it... https://www.facebook.com/share/v/17CoHrhAdY/

These still available yet? I have a customer looking for a Viper...

I can't tell exactly where that's coming from either. There is a ball bearing on the inside of the PTO shaft as well, it's possible it's coming from that bearing. The only way to remove and check is to pull the whole engine because you can't remove the complete shaft assembly without removing...

https://hurricaneperformance.ca/wp-content/uploads/2018/04/Turbo-Intake-Adaptor-998-Instrucions.pdf This is the instructions and measurements I've used on all the ones I've done.

They are 100% machined versus molded, run truer and are stronger than the OEM Cat ones. If you're going to buy a track, stud it, and change it, do it right, do it once.