i am building a srx 780 ice racer and i have a comet 108, a polaris three tower. and a stock yamaha. which one will be better to run.
You ll here Yamaha on most replies,,, but the 108's are good and the weights to tune it in are very reasonable.....$$$
Over the years I have tried all of these clutches on my Yamahas.
Heres what I found:
Polaris P85:
-these clutches work very well and are relatively inexspensive to aquire
-tuning parts are widely available
-changed my 1981 SRX improve stocker to Polaris primary + secondary clutches and gained 10mph on top end!
Comet 108c:
-same benifits as Polaris P85 as far as availabilty and tuning
- I found them a little harder on bushings
-lighter then the 1995 + newer Yamaha primaries
-tried one on my 1999 improve stock SX700 but quickly returned to the Yamaha primary
Comet 4 Pro:
-I still run one of these with a "911 cover"on my trail mod 1996 VMAX 4[Aaen piped, ported, 136"]
-I like these clutches but they are a little heavy and very sensitive to tuning
Stock Yamaha Primary:
-since Yamaha updated their primaries in 1995 the stock primaries are VERY good
-easy to rebuild
-very durable
-efficient
-easy to tune
-I ran the stock primaries on most of the sleds I raced and currently trail ride since 1995
[Vmax 4 Mod, SX 600 + 700 improve stock, 2002 SRX]
From my experience, any pre 1995 Yamaha primary could be improved on with any of the previous mentioned cluches but the later ones are the best choice.
Heres what I found:
Polaris P85:
-these clutches work very well and are relatively inexspensive to aquire
-tuning parts are widely available
-changed my 1981 SRX improve stocker to Polaris primary + secondary clutches and gained 10mph on top end!
Comet 108c:
-same benifits as Polaris P85 as far as availabilty and tuning
- I found them a little harder on bushings
-lighter then the 1995 + newer Yamaha primaries
-tried one on my 1999 improve stock SX700 but quickly returned to the Yamaha primary
Comet 4 Pro:
-I still run one of these with a "911 cover"on my trail mod 1996 VMAX 4[Aaen piped, ported, 136"]
-I like these clutches but they are a little heavy and very sensitive to tuning
Stock Yamaha Primary:
-since Yamaha updated their primaries in 1995 the stock primaries are VERY good
-easy to rebuild
-very durable
-efficient
-easy to tune
-I ran the stock primaries on most of the sleds I raced and currently trail ride since 1995
[Vmax 4 Mod, SX 600 + 700 improve stock, 2002 SRX]
From my experience, any pre 1995 Yamaha primary could be improved on with any of the previous mentioned cluches but the later ones are the best choice.
YAMMIEGOD3:16
Active member
WATCH FOR STRESS CRACKS ON YAMAHA PRIMARY. 3:16 (yammie tony)
ottawaair
New member
that's why he needs new ones... BANG!! Stress cracks turn into stress breaks & then you have some scrap aluminum.
i have had a few with cracks and a few break. i am looking for another one for sure.ottawaair said: