hi guys my mc21 only ticks over on the top cylinder checked plugs and leads oil pump servo cables rev it and it kicks in at 3000rpm and runs fine please help, the hole engine has just been rebuilt now with 300 miles on it im new on here and to nsr 250s
Have a look at your air screws and pilot jets, make sure they are not blocked or mis-adjusted. _________________ If I have to take the carbs off once more...
I had a similar problem with mine recently, it ran fine but stop at lights and it would cut out on 1 cylinder intermittently. I started the fault finding process with new plugs and lucky for me this solved the problem.
it works the sync was out on the carbs by quite a bit ? sounds sweet now not taken it out yet was raining loving the nsr i must say makes my nc29 feel like a tank, now i need to get it from 45bhp to 60bhp and if it can keep up with my 400
15 free horsepower by doing the wiresplice and modifying the airbox.
4x 20mm holes in the front slope of the airbox is the preferred method. Smaller holes allow you to blank two off it's too lean in cold weather. Smaller holes in the front of the lid have shown better results on the dyno than cutting the whole back off.
Remember it is ESSENTIAL that you check the jetting after. The OEM setting is generally rich from the factory, but take absolutely NOTHING for granted. Don't even assume your current jetting is standard. Check it first! Standard carb settings are in the Technical section of the Workshop. Link to the left of this page.
Please note: Non-standard jetting discussion is only allowed in the Members area. _________________ Andy.
NSR-WORLD.COM
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Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
thanks for that info what exhaust is the best, tyga side by side any good ive set the oil pump quite high more is ok right ? forget about my 29 never spent 5k on her so much hrc and greame france stuff on it road going but looks standard 65bhp allso have a 20rpm cbr 250 mc19 do love my 90s small honda's
Tyga SS is an excellent choice since those old JHAs are very rare and expensive,i have a set on my mc28 and i'm more than satisfied,they transformed the bike
We all have a soft spot for those old CBRs,smaller or bigger ones('98 900..)
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please help, the hole engine has just been rebuilt now with 300 miles on it im new on here and to nsr 250s
loving the nsr i must say makes my nc29 feel like a tank, now i need to get it from 45bhp to 60bhp and if it can keep up with my 400
spent 5k on her so much hrc and greame france stuff on it road going but looks standard 65bhp allso have a 20rpm cbr 250 mc19 do love my 90s small honda's 