Question on axle bearing supports?

This topic has 6 replies, 4 voices, and was last updated 12 years, 11 months ago by Chris Reinhardt.

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- September 15, 2013 at 7:55 pm #10005
  
  Steve Libretto
  Participant
  
  Chris, what exactly did you snap? Is it the cassette, or the bearing hanger on the frame? And where did you snap it? Take a picture and post it so we can offer suggestions on repair.
  
  Steve
- September 15, 2013 at 9:48 pm #10014
  
  Chris Beebe
  Participant
  
  Walt, you are correct! Just starting to tighten up the pinch bolt and SNAP the cassette broke clean off, right where one of the mounting bolts was located!
  
  Time to make some calls in the morning to see what replacements are easily sourced!
- September 17, 2013 at 3:41 am #10125
  
  Chris Reinhardt
  Participant
  
  The part you are referring to is called the cassette. What I usually do with the adjustable ones is take them in my hand with the bearing and snug them. You basically want all the play out, but you should be able to rotate the bearing about the cassette freely, but snug. Too tight and the kart will hop through the corner loading and unloading with a jerking motion…
  
  BTW I would either replace both outside cassettes with new ones, or just replace the one and put it in the middle position….
  
  CR
- September 17, 2013 at 7:10 am #10149
  
  Chris Beebe
  Participant
  
  Thanks for the info Chris.
  
  I did manage to find some that will work I think. We shall find out when they show up in the mail. Being you cant find any oem, and clearly they are weak, I just picked up three new cassettes and hopefully wont run into this issue again!
- September 18, 2013 at 4:53 am #10205
  
  Chris Reinhardt
  Participant
  
  MRP is the importer for Birel, I’m sure you could get OEM from them. The OEM’s really aren’t fragile, they might be Magnesium, but I have seen them run without issues… The OEM would probably be 2x the price of what you sourced in a Righetti or Wildkart part..
  
  You’re on the right track, good luck…
  
  CR
- September 15, 2013 at 8:51 pm #10009
  
  Walt Gifford
  Participant
  
  It sounds like you over tightened the pinch bolt and cracked the aluminum cassette? You only want to snug those but use some loctite so they don’t back out (unless it’s a bolt and nyloc nut). Put everything together loose, slide the axle through, snug the pinch bolt then tighten the three cassette bolts to the frame hanger.
  
  Don’t feel bad some of these kart components are poorly designed and made of crap metal. Yes, the bolt pattern is generally universal but be careful what you’re buying. The best stuff is made from 7075-T6 but some are made from easy cutting screw machine stock.
  
  Gif
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