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Clutch weights

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Old 12-11-2011, 09:02 PM
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Clutch weights

How heavy are the stock clutch weights for a 660? What do the heavier weights do for power and speed?
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Old 12-11-2011, 09:49 PM
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stock 660 weights is 18 grams total ,

700 weights are 20 grams total,

lighter weights will give u more rpm's and low end , heavier take of slower and add a few more to the top end, and hp has alot to do with weights and spring color,
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Old 12-11-2011, 10:07 PM
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Inner metal parts of the rollers weigh 15.5g each. I'm guessing the covers are 2.5g then...
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Old 12-12-2011, 05:48 AM
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Quote: Originally Posted by 1907 View Post
How heavy are the stock clutch weights for a 660? What do the heavier weights do for power and speed?
Heavier weights will cause the sheaves to up shift at lower rpm's potentially killing torque.


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Old 12-12-2011, 06:15 AM
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Smile FYI on my experience on weights and springs

Had grease type 14 g weights and changed to Greaseless for ease of maintenance. Grease type getting dirty and hanging up stopping the shift and speed. Tried stock spring, then Orange secondary spring and went back to Stock spring. Found out the Orange spring moved my RPM range at all speeds up about 500 RPM. I have a large tack and do so looking when I can. The Orange spring let me come out of the hole at 7400RPM and then it started shifting. Great for everything performance wise on the drags and hills but for dunning it kept me BUZZED UP between 6000 and 7400 RPM. The Stock spring brought me down to 5000 to 7000 when dunning and still kept my RPMs up pretty good on the China Wall and Olds. Found out that these engines go 8500RPM when flowed, cammed, carbed, etc. but I have a mild stroke, mild cam with stock cases and did not want to face the "blow up" sooner than latter. I think I am in my power ban (LOL) if I have one, NOW. PS most the Hi comp 686's that ran great had 14 g weights and Orange springs this last guys trip by CAMshaw. However, they don't have tacks to compare RPMs with.
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Old 12-12-2011, 01:03 PM
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Quote: Originally Posted by 1907 View Post
How heavy are the stock clutch weights for a 660? What do the heavier weights do for power and speed?
Stock weights are 16g on 660 and 18g on a 700...

If want an improvement in your hole shot get a sheave machined for lower gearing from a stop like the JBS...

And if you want more climbing power, better engine braking, get a an orange secondary spring...regardless of motor/vehicle mods...

Select your primary weights based on motor mods/ vehicle weight/ tire size/ application...

If you have basically stock rhino hp/lb and stock tires and round weights you cannot go wrong with orange spring and 16g weights...
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Old 12-12-2011, 08:46 PM
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Quote: Originally Posted by RuttingRhino View Post
Quote: Originally Posted by 1907 View Post
How heavy are the stock clutch weights for a 660? What do the heavier weights do for power and speed?
Stock weights are 16g on 660 and 18g on a 700...

If want an improvement in your hole shot get a sheave machined for lower gearing from a stop like the JBS...

And if you want more climbing power, better engine braking, get a an orange secondary spring...regardless of motor/vehicle mods...

Select your primary weights based on motor mods/ vehicle weight/ tire size/ application...

If you have basically stock rhino hp/lb and stock tires and round weights you cannot go wrong with orange spring and 16g weights...

the last 4 sets of oem rhino 700 weights i seen are 20 grams each and do not have covers there 1 piece,

people that have 700's do upgrade to the 18's if thats what u mean
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Old 12-13-2011, 08:27 AM
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Quote: Originally Posted by benzo View Post
Quote: Originally Posted by RuttingRhino View Post
Quote: Originally Posted by 1907 View Post
How heavy are the stock clutch weights for a 660? What do the heavier weights do for power and speed?
Stock weights are 16g on 660 and 18g on a 700...

If want an improvement in your hole shot get a sheave machined for lower gearing from a stop like the JBS...

And if you want more climbing power, better engine braking, get a an orange secondary spring...regardless of motor/vehicle mods...

Select your primary weights based on motor mods/ vehicle weight/ tire size/ application...

If you have basically stock rhino hp/lb and stock tires and round weights you cannot go wrong with orange spring and 16g weights...

the last 4 sets of oem rhino 700 weights i seen are 20 grams each and do not have covers there 1 piece,

people that have 700's do upgrade to the 18's if thats what u mean

Yes, unless Yamaha changed them later the 700's had 20 gr. roller weights with non-removable covers. To my knowledge they even stopped making 20 gr. OD weights also because the 18's perform better in the stock 700 rhino. I have a set of 20's though if someone wants to try them.
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Old 12-13-2011, 08:49 AM
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Thanks I did not know they changed the 700s along the way...

660s are 16g all years from the factory...

Keep in mind that 16g is a rounded off number as are all the steel aftermarket inserts for 660s I have ever seen which is a bunch...

Every round and OD greaseless Dr. Pulley weight I have measured was dead-on the money...nib of course...
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Old 12-14-2011, 08:55 AM
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I bought the blue spring years ago. I did see a change. But with the R & D that everybody has done, what would be the best combo for me. Bronco clutch? I have a 686, custom headers, 10:1 JE piston, KMS sheve , stock weights, 26" big horns, Mikuni carb, 1450 lbs wet and race ready.
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Old 12-14-2011, 09:15 AM
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Quote: Originally Posted by 1907 View Post
I bought the blue spring years ago. I did see a change. But with the R & D that everybody has done, what would be the best combo for me. Bronco clutch? I have a 686, custom headers, 10:1 JE piston, KMS sheve , stock weights, 26" big horns, Mikuni carb, 1450 lbs wet and race ready.
What type of riding or racing.? I like my orange spring, 13g weights and my AzCourt machined sheave....lots of out of the hole and still topping out around 60 plus depending on conditions

Have stock 450 weights in now and its alittle much in the dirt..nice for the sand tho
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Old 12-14-2011, 09:30 AM
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Quote: Originally Posted by 1907 View Post
I bought the blue spring years ago. I did see a change. But with the R & D that everybody has done, what would be the best combo for me. Bronco clutch? I have a 686, custom headers, 10:1 JE piston, KMS sheve , stock weights, 26" big horns, Mikuni carb, 1450 lbs wet and race ready.
You need at least an orange spring it will be huge improvement over the blue for what you have...you might like the purple or gold better...

The smart thing to do is get all three and test each one with stock 16g weights or better still 16g greaseless...
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Old 12-14-2011, 09:58 AM
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Is it even worth the effort compared to the Bronco clutch? What speed or torque differences will the orange give. I am interested in the greaseless weights for sure. Were to buy and what are good prices for the spring and weights? I have a race Jan 6.
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Old 12-14-2011, 11:18 AM
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Quote: Originally Posted by RuttingRhino View Post
Quote: Originally Posted by 1907 View Post
I bought the blue spring years ago. I did see a change. But with the R & D that everybody has done, what would be the best combo for me. Bronco clutch? I have a 686, custom headers, 10:1 JE piston, KMS sheve , stock weights, 26" big horns, Mikuni carb, 1450 lbs wet and race ready.
You need at least an orange spring it will be huge improvement over the blue for what you have...you might like the purple or gold better...

The smart thing to do is get all three and test each one with stock 16g weights or better still 16g greaseless...
When u say 16g weights are you talking total weight or without the covers
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Old 12-14-2011, 11:19 AM
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total weight hes talking ,


everyone i know with a built motor luv's lighter weights, 12-14 total grams ,
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