Frostbite
TY 4 Stroke God
I have Heavy Hitters in my RX-1M with 15mm rollers. I went to 15mm rollers initially because I thought it would make my clutch weights have more effect (act heavier) for air strip racing and perhaps they do)?
Now with Stanley and the prospect of deep powder coming up I will be a little more interested in back shift and deep snow performance. I am contemplating putting my stock 16.5 mm rollers back into my primary.
Won't the 16.5mm rollers make my sled more rev happy and require me to throw more weight at the primary (or in this case give me the extra RPMS I may need for climbing)?
I have more weight on the Heavy Hitters now than I am supposed to be able to pull at this altitude (3,000-6,000 feet) and I am still turning 10,700. I have the 1/4 and 3/4" allens in the heel, the 7/16 steel with 2 thin washers in the center and a 7/16" steel in the tip. This is with the stock O/S/O spring and a 54/42 helix with a silver spring at 80 degrees.
Is going back to 16.5 s a good or bad idea? Why did Yamaha select 16.5 mm rollers in the first place? Was it a band aid for bad stock clutching? Thanks for any input. PB
Now with Stanley and the prospect of deep powder coming up I will be a little more interested in back shift and deep snow performance. I am contemplating putting my stock 16.5 mm rollers back into my primary.
Won't the 16.5mm rollers make my sled more rev happy and require me to throw more weight at the primary (or in this case give me the extra RPMS I may need for climbing)?
I have more weight on the Heavy Hitters now than I am supposed to be able to pull at this altitude (3,000-6,000 feet) and I am still turning 10,700. I have the 1/4 and 3/4" allens in the heel, the 7/16 steel with 2 thin washers in the center and a 7/16" steel in the tip. This is with the stock O/S/O spring and a 54/42 helix with a silver spring at 80 degrees.
Is going back to 16.5 s a good or bad idea? Why did Yamaha select 16.5 mm rollers in the first place? Was it a band aid for bad stock clutching? Thanks for any input. PB
Turk
Tech Advisor
I can get better backshift by taking out some heel weight & lightening up the tip. You don,t need to swap the rollers. A drag race set up won,t backshift worth a damn & a mountain set up sucks for drag racing...you can,t have both.
Frostbite
TY 4 Stroke God
I hate it when you're right! I thought I'd go to little more tip weight and add a thin steel washer under the 7/16 steel bolt and leave everything else the same.
I hated it! It only pulls 10,100. I tried removing the 1/4" in the heel to get some RPM back without having to pull the clutch apart. Instantly the backshift was MUCH better but I still hate the top end feel. That was with the secondary at 90 degrees too. So maybe, that was part of the problem?
I think you were right on something else too. Your tip weight should always be 2-3 grams less than your center. I'm going back to what I had in the original post. For the trail it works great. When climbing I'll just pull out the 1/4" allen in the heel for a little better back shift. I tried 90 degrees of twist with the silver spring again. I hate it. It feels like it is holding the motor back but it does amke the sled more revy feeling. Personally I think 80 degrees is the best for my applications.
I realize you can't have the best of both worlds in clutching. I am just trying to find the best compromise I can for both mountains and trails. Thanks for sharing your insight. PB
I hated it! It only pulls 10,100. I tried removing the 1/4" in the heel to get some RPM back without having to pull the clutch apart. Instantly the backshift was MUCH better but I still hate the top end feel. That was with the secondary at 90 degrees too. So maybe, that was part of the problem?
I think you were right on something else too. Your tip weight should always be 2-3 grams less than your center. I'm going back to what I had in the original post. For the trail it works great. When climbing I'll just pull out the 1/4" allen in the heel for a little better back shift. I tried 90 degrees of twist with the silver spring again. I hate it. It feels like it is holding the motor back but it does amke the sled more revy feeling. Personally I think 80 degrees is the best for my applications.
I realize you can't have the best of both worlds in clutching. I am just trying to find the best compromise I can for both mountains and trails. Thanks for sharing your insight. PB
