Mc21 gearing

**Sat Jul 11, 2020 4:14 pm » Post: #1 » Download Post**

What is the standard sprocket size front and rear? What size you prefer for street use?

**Sat Jul 11, 2020 5:04 pm » Post: #2 » Download Post**

15/42 is standard on the MC21, and we generally find 15/40 to be a pretty good balance for a delimited bike.

15/42 = 158kmh @10,000rpm in 6th
15/40 = 165kmh @10,000rpm in 6th
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Andy.
NSR-WORLD.COM

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