stockbutfast Posted November 21, 2011 Report Share Posted November 21, 2011 What brand is the TZ bearing stroking? Using TZ bearings causes the crank to float side to side inside Banshee cases. Using the helical gear adds lots of stress on the crank. When Yamaha built the TZ racing motors in the 70's. Yamaha had the center bearings clipped in the case to keep the crank from moving. Yamaha also used straight cut primary gears on all race motors. I don't use TZ bearings. I use 11 & 13 ball maxload bearings on all my stroker cranks. Since I'm a 1/4 mile drag racers. For extra insurance I do have my cases grooved to clip center crank bearings. Look at the picture. Shows where to add the clip groove in the case. My machine shop does the work. Just wondering who did your machine work for you. Thanks Mike Quote Link to comment Share on other sites More sharing options...
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