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Discussion Starter · #1 ·
Finished my 520 chain and sprocket upgrade on my 998 tonight and I am looking forward to a test ride tomorrow. Specs as follows:
DID 520 chain
AFAM quick change rear sprocket hub
AFAM 39 tooth steel chain ring
AFAM 14 tooth front sprocket
AEM star drive flange
EVR front sprocket cover

I kept my cush drives as they appeared in pretty good shape. I also picked up a Ducabike aluminum rear sprocket side nut, which looks really nice, but I was nervous about trusting the aluminum and I put the steel nut back on. I will report back on the change the sprocket sizes make.
Bicycle drivetrain part Crankset Bicycle part Auto part Groupset

Tire Automotive tire Wheel Alloy wheel Auto part

Wheel Disc brake Auto part Tire Rim
 

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102 Posts
Discussion Starter · #2 ·
Got in a nice test ride today. RPM seems to be up by about a thousand in a given gear with the new sprockets. It definitely helped to keep the revs a little higher and smoother. It also enhanced the always awesome freight train pull that I love in the 998.
 
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