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 Topic: Spare jets found.. 







Andy
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Andy » Sat May 02, 2026 10:12 am

The MC21 front (lower) cylinder is enriched by means of a larger power jet. (#75 vs. #72)

Carb orientation as per our Honda approved English Service Manual.



The carbs are easily removed as a compound assembly, with the removal of the two clamps securing them to the manifold. Disconnect the TPS, but you don't need to disconnect the throttle or oil pump cables. There's just enough room to turn the carbs to get the float bowls off and change jets. Once you've done it a couple of times, it's a very quick procedure.

Please see the stock jetting page in the Workshop section for standard settings, and the HRC base settings in the Carb Tuning section of the Main Site.

I'm afraid we do not allow specific jetting discussion in the public forums for reasons mentioned numerous times.
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.


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