Hello , I have a 1990 NSR250R MC21 and sell me a sprocket with reference 23801-kv3-950 . The seller say me it is good for MC21 and MC28 . But the reference for MC21 is 23801kv3000 . It is good for my bike ? is the same sprocket in MC21 and MC28? thank you

Where did you get the 23801-kv3-000 number? Looking on www.tso.us.com/ the 23801-KV3-950 comes up under the front sprocket for the MC21 and MC28. Maybe the 23801-kv3-000 was superseded?

The original part number is 23801-kv3-000
Replaced by 23801-kv3-950
Both list as 15 teeth
JT sprockets are a good choice
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