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 Topic: NSR 250 MC21 engine gearbox problems 







weizen_waldi

 
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weizen_waldi » Fri Jul 11, 2025 1:56 pm

Hello,

i disassembled the clutch and transmission, I noticed the left shift fork is a "NF5 3(or B) L", so looks like it's from Honda RS250 NF5, wondering if the shift forks are interchangeable, does anybody know? Just asking, because standing on a spot I was able to shift.
Is the "L" shift fork responsible for power transmission of 5th and 6th gear?

Other shift forks are KV3 C + R, so this should be correct.

This was the only thing I noticed directly after disassembling the gearbox, will take another look today evening or tomorrow.
I will upload pictures later.

Thanks for your opinion after this input.

Kind regards, Felix
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