Popped off my oil spinner the other day and had a machinist buddy with a lathe who owed me a favor turn down the spinner. Did one main cut to get the overall OD down to where the thickness of material outside the 3 main holes was the same as the to the inside. Then did a second further step in leaving 10mm of the main OD so the bolts could thread in. The second step went down about halfway through the holes. We probably coulda taken more off the second step but returns at that point were going to be minimal and i didnt want to compromise the spinners integrity.
Realistically the majority of the weight came off in the first OD cut and that was furthest out from the crank (hardest to spin).
Weight before 1034g, weight after 446g. 588g weight reduction (or 1.296lbs) THATS ALOT!
Overall impressions. The bike is MUCH more responsive, she revs quicker, revs SMOOTHER, and feels more free at the top end. It seems like the bike cruises at 55mph easier now. But the biggest thing is the much better throttle response, Definitely a worthwhile upgrade if you have the know how. Cost was free for me outside of sacrificing a socket to make the tool to pull the spinner nut off. Also threw in some EBC clutch springs while i was in there (10 bucks) for a little bit better clutch bite.
Realistically the majority of the weight came off in the first OD cut and that was furthest out from the crank (hardest to spin).
Weight before 1034g, weight after 446g. 588g weight reduction (or 1.296lbs) THATS ALOT!
Overall impressions. The bike is MUCH more responsive, she revs quicker, revs SMOOTHER, and feels more free at the top end. It seems like the bike cruises at 55mph easier now. But the biggest thing is the much better throttle response, Definitely a worthwhile upgrade if you have the know how. Cost was free for me outside of sacrificing a socket to make the tool to pull the spinner nut off. Also threw in some EBC clutch springs while i was in there (10 bucks) for a little bit better clutch bite.


