I know a bunch of 449/511 310's and a few other bikes came with 45T rear sprockets people took off as they are useless for off road. I'm configuring my 511 for more Ds this summer and want one. Anyone got one laying around?
I've got a stock 40 and Dirt Tricks 45 in the 310 take off parts box. The 45 used just a little with a brand new chain before migrating to a 50.