Well i bit the bullet this weekend and tried to install this "direct replacement" from Rivera. I went with Rivera because im already running their PC 1000 clutch so i thought they would be a good team. Instructions said take out the old, put in the new and check belt alignment. No mention of any modifications which 'may' be required.
1) had to grind out most of the front primary cover screw boss in the inner before the motor sprocket could even go on. 2) had to grind the first top and bottom screw bosses to clear the belt. 3) had to pull the rear transmission inner primary mounting studs because they hit the ring gear on the clutch basket and replace them with bolts and no washers so the heads would not protude too much. OK now everything spins. Put the outer cover on and kicked it - OK so far. Hit the electric start and CLUNK, again CLUNK, again CLUNK, again CLUNK, again CLUNK, again and it engaged. Pulled the outer cover and the clearance between the ring gear and starter gear is only about .050 ". This is not enough to allow the Bendix to getting moving and spin into the ring gear. The starter action is bottoming out at the inner primary when not actuated so there is no way to gain more clearance. Rivera's answer - shim the starter -- WILL NOT HELP. Maybe the clutch hub was over torqued and now goes on too far. ITS A PERFECTT SHAPE MAINSHAFT AND RIVERA'S LIKE NEW CLUTCH HUB AND THIS WAS NOT A PROBLEM WITH THE CHAIN DRIVE CLUTCH BASKET. Has anyone out there experienced this problem??? Has any one with a BDL Belt drive on a early electric start shovel head had this problem?? What's the fix?? (I'll switch to BDL if i have to and hope that the Rivera clutch hub works better with it (the BDL clutch basket) than with the Rivera!)