Drilling clutch weights to shave 2 grams

R

rmkdave

Free Member

Sep 21, 2008

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• Jan 30, 2010

• #1

According to the set-ups on my airbox I need to drop 2 grams on my wifes 500 MC clutch weights (42.5 to 40.5).

Rather than spend the $50 on new weights is it possible to drill 2 grams out of the center of the weight? I have access to a scale and thought I would just start with a very small bit and keep stepping it up a size until I get to where I need to be.

I know I'm cheap... but it seems wastefull to drop $50 on new weights if I could do this myself easily.

 

m8magicandmystery

Well-known member

Lifetime Membership

Jan 20, 2008

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Yukon

• Jan 30, 2010

• #2

yep..drill or grind the side

 

Rixster

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Premium Member

Oct 20, 2005

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Springville, UT

• Jan 30, 2010

• #3

i would grind them. Just grind the bottom side a bit.

 

X

XR-tech

Free Member

Nov 5, 2009

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• Jan 30, 2010

• #4

Grind the backside of the weights. You can buy a tool that holds all three for grinding evenly (if you felt like spending the $ to do it accurately).

 

R

rmkdave

Free Member

Sep 21, 2008

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• Jan 30, 2010

• #5

Thanks!

 

P

PSYCHO EYES

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Jul 8, 2009

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Wisper Mtn

• Jan 31, 2010

• #6

if u have a good scale the u r better off to grind 1 gram off each side so u dont cause an imbalance in the weight. Drilling will put it off a bit. put your weight against the side of a grinding wheel and shave 1 grfm per side. Good luck

 

H

high time

Well-known member

Nov 28, 2007

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Duluth, MN

• Jan 31, 2010

• #7

It doesn't hurt to grind it off one side.

I would however change the ballance to drill holes. I grind the side with the stamping, as you're changing the weight, so get rid of the wrong marking.

Owen