Am I over thinking this or not?

[ridesrx]

I posted this on the .net site but it's within a post that might not get read, so I thought I would try here too. I changed the inner hole rivets on my stock 98 srx weights(8DF)because of over revving.(Turk recommened 4.5 in each hole) I weighed the new rivets before I put them in and they were exactly 4.5 grams, just like they should be. The 8DF weights alone weigh 37.84 grams. 4.5g in each hole would be 9 grams of weight, plus the 37.84 of the weight itself should be 46.84 total. They're not! Each weighs differently, one is 48.1g and one is 47.9g and one is 47.6g. I thought the outer rivet, which is the original from the factory was a 4.5gram, but it can't be. If my math is correct one is 5.76g, and one is 5.56g, and one is 5.26grams. What is going on here? There aren't any rivets that heavy. There is a difference of .5gram between all three weights. Won't that make the clutch out of balance? Also I weighed them on two different scales and they are calibrated right. What should I do about this?

 

[Mtnviper]

Yes the weights can be off that much. I've seen some aftermarket weights off as much as 2 grams! Yamaha weights are usually pretty close, you most likely wont notice .5 of a gram. But if you want them dead nuts on, you can grind some weight off the sides, using a stationary belt sander and gram scale. Just be sure and remove weight evenly accross the side of the weight. Also do not grind on the profile side as it will effect shift force.

 

[ridesrx]

clutch balance?

So this won't effect the balance and hurt the crank?

 

[Brad]

fly weights

Just start all over while you have it apart do it right.weigh each weight bare with no rivets in, then see if all are the same if not make them all the same,then add the rivets or weigh them firts and make every one the same wieght so when you are all done you know exactly what you have.The smoother that clutch runs the better it is for everything