Hey everybody im new to the site and i just want to no if you can get some good HP gain out of the NSR150sp and would it keep up with a stock CBR250RR....
And could anyone tell me what are some good mods for it, as ill be purchasing a NSR150sp soon. i would go the NSR250 but it is not learner legal in (N.S.W Australia)

any help would be good thanx

The NSR150SP has some healthy restrictions from the factory.

First you need to dump the pipe and fit a decent expansion chamber. This can grab you a bunch of ponies, 'cos the stock pipe has a cat in it and weighs a ton.

The engine is quite restricted by design, but unless you're a bit handy with the grinder then there's probably not much you can do about that.

A race CDI is another option. Designed for SP racing (standard engine & carb).

You could also junk the airbox and fit an after market filter and rejet.

If you're feeling flush then a big carb can help breathing, but anything over 34mm tend to be a little over kill unless you can modify the intake tract of the crankcases.

Basic bolt on mods could see you up around the 28hp mark. Unlikely that you'll get over 30 gee gees without engine mods.

40hp is possible with max mods to everything, big carb, etc etc.......

As to whether it'll beat a CBR250? That's a sticky one, 'cos the CBR isn't actually too bad. It'd be a close race, but only because the CBR is a fat pig. Then again, the NSR150SP isn't exactly a lightweight.

Best plan is buy the NSR150. Stick a pipe on it to give the motor a bit of freedom, pass yuor test (or whatever you have to do), and then buy an NSR 250 MC21 and demolish any CBR250RR that has the cheek to try and compete.

oh ok thanx for the tips, i would love to buy a NSR 250 MC21 but canot at the moment coz of the restrictions we have in N.S.W which sucks, looks like ill have to have a go at the lil 150.. The reason why i asked if the 150 would keep up with a stock CBR250RR is because my mate has one, but not for long he is getting a 2007 model R6. Thats crap for me as ill have no chance of hunting him down lol.... what do you think of the RVF400 is there much that can be done to get them to fly.... and which would be better a NSR150 or the RVF400 as i can purchase them around the same price.. i no i love asking questions but im new to the Honda's.

lots of help would be good

Oooh dear, diesel questions...hopefully I can click submit before Andy clicks "lock thread".
An RVF400 will flat out destroy any NSR150 or CBR250, it will give a "normal" NSR250 a decent race as well.

But on the other hand you'll get mocked openly for having a big fat diesel.

Sshhhh....I've got one
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread

but you own 2 big fat Diesels.
_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

So you can't have a 250, but you can have a 400?
_________________
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.

Check us out on Facebook! Please "like" our page!

250's are cool....400's ain't. That's why he's allowed a 400. The government doesn't like cool people.