Ryan Thompson – RLT Photo
Yesterday, Yamaha put out some new info onto the great and wondrous world wide interweb regarding its new 3-cylinder 998cc FI turbo 4-stroke Sidewinder. You will remember that AmSnow recently had this sled on a dyno at Dynotech Research. It pulled 204.1 hp and stirred a lot of Yamaha folks blood ... and got the attention of competitors, too!
Now there have been a few more technical updates released regarding gearing and the like from Yamaha's Canadian contingent, specifically from Product Planning man Chris Reid. He had this to say about it in a Yamaha Sled Talk blog post:
The Sidewinder gearing specs that were posted (with the disclaimer ‘subject to change’) have been tweaked recently. The latest numbers I have been given are as follows ...
129-137= 9T x 2.86 @ 21/41 gear.
141 x 1.6 & 153 x 1.75 = 8T x 3.00 @ 21/41 gear.
141 x 2.25 & 153 x 2.25 = 8T x 3.00 @ 24/50 gear.
162 x 3.00 = 7T x 3.00 @ 21/49 gear.
Our engineers plan to continue testing and development well into spring in the quest to produce the best performing sleds possible. I wouldn’t be too surprised if there are additional updates into production. I have asked a couple of senior engineers if the new turbo will deliver the same horsepower and torque as we have seen in the validation units. The answers have been quite positive with no changes indicated that would affect the performance.