Balancing Clutch weights

[jdtech65]

I decided to get a gram scale this week and weigh my clutch weights.

Heres what I found

10-62s -> 62.75, 62.71, 62.62 - Not too bad .13 gram variance

10-58s -> 57.76, 57.83, 58.40 - Way to much variance .64 Gram

10-60s -> 60.16, 60.32, 60.65 - Not too good either .49 Gram variance

Well worth the $15 the scale cost.

Now my question is for those that have balanced your clutch weights where are you removing the extra .5 gram of weight from? Are you removing it all from the back side with most of the weight being removed under the weight identification numbers where it jogs out that little bit. Does it matter where on the back side of the weight you remove the extra weight from or just remove it from the same spot on each one?

 

[Rev Kev]

I check all mine, and grind them to match.

 

[jdtech65]

I check all mine, and grind them to match.

Where do you removing the excess weight off of the heavier weights?

 

[AndrettiDog]

On the bottom side (not the curve side). Just make sure it is in the same spot on all three.

I get all of mine within a tenth of a gram. It might not seem like much if they are different, but remember that is rotating mass (moving very quickly).

My stock weights were all 60.5 (all three).

I just bought 58's and two were 58.6 and the other was 58.5.

 

[Sixat38]

I've always used the side of the grinding wheel and ground the side of the weight opposite of the stampings (i.e. 10-60). It doesn't take much. This way I'm taking off a small amount the entire lenghth of the arm. Or nearly the entire length. And I don't have to worry about picking an exact spot. Also, I'm only grinding two weights... to match the weight of the least heavy one.

Then test on the hill. Then change the spring. Then helix. Then may be another helix. Then maybe another spring. Or even secondary spring. Then buy new weights. Grind on those a little. Then a little more. Then change back to the original weights and weld back on some material. Then wonder what the he!! I've been dong all winter cuz now it's almost time to quit riding. Then summer and time to ponder where to start with my clutching for next year. Hummm.

 

[rotax]

can anyone show a pic of a ground weight?
so i know exactly where to grind?

Thanks.

 

[fraufarm]

just grind on the sides of the weight along the entire surface

 

[Jay]

What sixat38 and fraufarm said.

 

[NapaMatt]

pic

Here u go..

Here's a pic..

Hope this helps

also.. I would be taking off Right by the 60# number.. towards the bottom..

Kinda like Measure Twice Cut Once!!

Take very little off at a time!!!!!!!!!

 

[HPJUNKIE]

I decided to get a gram scale this week and weigh my clutch weights.

Heres what I found

10-62s -> 62.75, 62.71, 62.62 - Not too bad .13 gram variance

10-58s -> 57.76, 57.83, 58.40 - Way to much variance .64 Gram

10-60s -> 60.16, 60.32, 60.65 - Not too good either .49 Gram variance

Well worth the $15 the scale cost.

Now my question is for those that have balanced your clutch weights where are you removing the extra .5 gram of weight from? Are you removing it all from the back side with most of the weight being removed under the weight identification numbers where it jogs out that little bit. Does it matter where on the back side of the weight you remove the extra weight from or just remove it from the same spot on each one?

I take mine off the side, with a belt sander. No grinders for me!

 

[hiwayman]

Do my weight balancing by taking weight off the sides. grinder for major work and belt sander for finish or minor work. the way you don't change the weight profile. grinding off weight on the tip or in the middle changes the weight profile and how the weight shifts up or down!

 

[GoBigParts]

I found most of the Polaris weights come in heavy.