Lightening the flywheel:)
#1
![Default](https://www.kawasakiforums.com/forum/images/icons/icon1.gif)
Ok, the other day I was lightening a flywheel for a customer. Now...I've done about 12 of these over the past few years, and when I set them up on my lathe I always indicated the center bore to make sure it's at zero run out. Here's what i have found on a couple of KLX flywheels(including my own) they are NOT concentric. Meaning the center bore and the outside diameter are a bit out of wack....about .007 to .009 thousandsths of an inch. Now this would explain why my KLX had a slight vibration at 5k rpm. So, not only did the 1lb. of material that I took off the flywheel help the motor rev up quicker but the annoying vibration is now gone as well.
![Smile](https://www.kawasakiforums.com/forum/images/smilies/smile.gif)
#7
![Default](https://www.kawasakiforums.com/forum/images/icons/icon1.gif)
Yes it's a manufacturing flaw on some of the flywheels. The flywheel backing is riveted onto the magneto rotor, and if everything is not lined up 100%perfect...then you have what we got here. To just true it up, it would only take less than half an ounce of material to be removed.
#8
![Default](https://www.kawasakiforums.com/forum/images/icons/icon1.gif)
You don't lose any of the tractor-like feel, but what you do gain is a little bit more throttle response.....since there's less weight to spin quickly.
#9
![Default](https://www.kawasakiforums.com/forum/images/icons/icon1.gif)
Hmmm.. I may have to try this. I'm going to try to source an extra flywheel so I can have both.. I'll be in touch ![Smile](https://www.kawasakiforums.com/forum/images/smilies/smile.gif)
EDIT - what am I talking about? I forgot I have an extra entire bottom end... I am going to pull that flywheel. I will shoot you a message when I have it off to see where to send it.
Thanks!
![Smile](https://www.kawasakiforums.com/forum/images/smilies/smile.gif)
EDIT - what am I talking about? I forgot I have an extra entire bottom end... I am going to pull that flywheel. I will shoot you a message when I have it off to see where to send it.
Thanks!