Well, I just managed to snap a bearing support on my shifter kart! Sure wish there was a manual on the process because it took little to no pressure to snap the support for my axle bearing! What is the process for this? Three main bolts first and then tighten the pinch bolt? I figured pinch bolt first but that did not seem to work well for me!
Now I need to source a support for my 98 birel 40mm axle! It has three mounting bolts to the frame. Are these supports usually a universal bolt pattern or is this kart specific? Need help soon being I need this back up and running for the next race! Help!!!!!!! :(
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….
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!
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..
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.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience