after i finish with building the cbr it will be the NSRs turn on the paddock stands in the shed, now i have had a look on the main site (honest) and i cant find the bit for MC21 jets.
i would like to know what the standard jets are as i know that mine had the jets fettled befor i had the engine rebuilt, as i now have my good ole starting prioblem back (the problem that helped me discover this fantastic site) i am gonna take off and strip and clean the carbs this winter ready for the spring ( andy) and i want to put it back to standard so i can start again.

hope this made sense....its a 21R by the way
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MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

Billy, you could take the main jets out and it would still start ok. So what ever your starting prob is its not the main jet size. Stock size is 128 i think. I woudl try looking for blocked air jets or maybe a blocked slow running system first... leave the jetting alone for a min, when it does run its ok doesnt it.
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If I have to take the carbs off once more...

yeah no worries. i think alot of the problem is dirty carbs so i figured while i have the carbs off and are givin em a good clean i could put the jets back to standard while i was at it.

cant do it just yet the cbr is still in the way, its gonna be in the new year, just wanted all the info be for i started....
_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

You have to get it running for the secret day monkey so we can laugh at its power output.
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If I have to take the carbs off once more...

I'll do my best.......GIVE ME THE DAMN JET SIZES ..........sorry, please may i have the standard jet sizes. please.......
_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

What part of 128 didnt you understand??? laughin...
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If I have to take the carbs off once more...

Mine appear's to be stock...

Main 128s
Power 75(rear) 72(front)
Pilot (low speed) 38
Air screw about 1 1/2 turn out.

Of course these are brilliant setting's, my bike being the stomp-monster that it is

Or was that Swamp Monster...

oooooops..

LOL sorry, how do i put this....i am a little mechanically challenged when it comes to engines....thankyou stephen
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MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

For you Billy anything, we have to get that thing of yours running for the secret trackday in france ::nudge nudge:: do you have written permission from your girl yet?
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If I have to take the carbs off once more...

i havent approached the subject, looks like it could be a problem as the cambelt went on the MR2 on the way to work this morning.....cheap fix that'll be then .
think i will have to see, we are supposed to be going to scotland with some friends in april, then theres the devon dyno ting, and a trackday in france and many more trackdays in the summer. all of this and i am supposed to be saving to go back to thailand.
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MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

Been working on a new format for the Tech section... here you go Monkey, stock jet settings - for all models.

Technical Resources - NSR250 Jetting

Andy.
NSR-WORLD.COM

thanks andy, nsr nearly going up on the stands just gotta mount the break lines, and the chain on the cbr.
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MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold