I am looking into doing the welded clutch mod BUT have a question first. One welded unit I saw the center is not flush and on a second the center is flush.
Does this matter at all?
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Compensates for aggressive take off. Allows more cushion for all the weight of bike and rider. Bad for track. You be bucking like the P.B.R. under hard launch
If you going to race you need clutch mod. The stock back torque limiter as its called has the play in it. You don't want that. Thats why the one in the picture is welded - to eliminate play. I have heard of people welding them wrong and it looks like you have one of those in the first pic. Need to be flush like 2nd pic. $40 mps has. used ones about same price