| Listed in parts books | Not catalogued by year yet |
SHIM CUP,BSA MAIN BEARING
A shim cup for a BSA main bearing, part number 71-3288.
This is a shim cup for a BSA main bearing, part number 71-3288. The description in our records ties it specifically to BSA, not Triumph, so if you're working on a BSA bottom end and need to shim the main bearing setup, this is the part to check.
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We don't have much more detail on this one beyond the basic description. Shim cups like this are used to take up clearance around a main bearing so it seats correctly in the case, but we can't confirm exact dimensions or which BSA models it fits from what's on file.
Give the shop a call and we'll help confirm fitment before you order, especially since this is a BSA part and not something that crosses over to the Triumph twins we mostly deal in.
Sorry if we got something wrong here. If you think this information isn't correct, .