I had similar issues with my Kyosho Plasma Ra 2nd gen. The arms were not equal left and right. So, I ended up using Team Power shims to even out the discrepancies.

This is what I did a while back.

Originally Posted by EDWARD2003 View Post
Just a little heads up for Plasma Ra owners.

Kyosho has released some updated front suspension arms which have small dots on them. These dots indicate what side to insert the suspension balls into the arm. I guess the older arms didn't have this feature and racers were inserting them the wrong way.

So whats the problem?

Well, for some reason, Kyosho decided to mold the suspension arms under one mold. That said, when you buy a package you'll get two right suspension arms. Ideally, it should be a separate left and right. But, Kyosho thought it would be a smart idea for the user to simply flip the suspension arms to make a left and right from only one arm.

In the manual states the arms must be flipped with directional dots facing up. However, in order for the left arm to work you have to have the dot facing down. Many of you will say, make sure the both dots are facing the same way. Well, you cant. I've tried this and it results in the suspension geometry (arm sweep) to be opposite. As a result the kingpin will not fit and the kingpin angle is too severe.

With the arms flipped there's a slight problem now. This flipping of arms has resulted in a 0.5 mm height difference between the left and right side. Also, the suspension balls are riding at different position heights (0.10 mm difference each side). This 0.10 mm difference is due to the arms being flipped and the position of the suspension balls resting at different heights. The left suspension ball on the top of the arm is sitting 0.10 mm higher than the right. The right suspension ball on the bottom of the arm is sitting 0.10 mm lower than the left. So I need to compensate by adding 0.10 mm shims.


Trust me, I tried re-inserting the suspension balls to make them even. It doesn't work.

So, I ended up fixing this problem by shimming the suspension balls by using 0.10 mm shims on both sides. Then I put 0.5 mm shims under the right side bulkhead to raise the arm to match the left arm. Everything is equal and square on.

Just to let you know, I checked everything to see if it was bent. Everything checked out perfectly fine. The chassis is not tweak, all the measurements were done on a pane of glass.

Just to let you know, I've tried 3 different suspension packages and the results are the same.