was thinking of a rs250 engine in a mc28 would be nice
then i notice there drive is opposite to mc28

could u put a rs250 engine in a mc28, along with
rs250 pro/rear arm and brakes etc?

how long will the engine last for comuting?

sounds stupid... but just a thought ,thnx

rodney007 wrote:
...sounds stupid... but just a thought ,thnx

We'll leave it at that then!

You're barking up the wrong tree! Get an HRC card and a set of pipes, and have it set up properly. Fontyyy's is getting on for 63hp, about as rapid as you'll get an MC28 without getting inside the cases, and makes for a quick enough ride to make it exciting.
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Last edited by Andy on Sun Apr 01, 2007 9:08 pm; edited 1 time in total

To be fair if you really wanted the RS250 power either get an RS250 NF5 engine (shares crankcases with NSR range) or go buy an RS250 NX5 (single sided swinger model) and fit lights. Here in the UK you can pick up an early NX5 for about the same price as a decent MC28. The NX5 has so much better kit , but of course needs a top end rebuild every 150 miles....or could be kms. and a new crank every 1000miles (or kms).

Havbing ridden an NX5 around the streets, you're definitely asking for a hard time. specially if you're considering it as a commuting tool. It's about as unpractical as you could get.

Andy's right about getting the 28 set up right. It'll be much nicer, and faster through the traffic, and you won't need to stop at the chippy for a ring change.

Even the F3 is becoming some what of a pain to go to work on. I fouled a plug a couple of days ago because people wont go around roundabouts fast enough. Then they look at me all funny when I start whipping plugs out.

Its even worse if they've just seen the song and dance at the petrol station

RS on the road? good fun for a short time.
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If I have to take the carbs off once more...

I took the 300 for a blast to the office and back yesterday morning, and then out to meet Andy for coffee, and then again to watch the GP and listen to Andy saying how boring the MotoGP bike are. He's not far off the mark!

This morning I've got sore wrists, my bum cheeks are a bit sore from all the bouncing around, and I've got this strange 13,000rpm ringing in my ears.

Now, if I'd taken the KSR110 then I'd have been fine, and I doubt it would have taken me much longer from point to point.

Matt@TYGA wrote:listen to Andy saying how boring the MotoGP bike are. He's not far off the mark!

To be fair Andy would say that even if it wasn't, he said it last year too and as a racing spectical last year was good, but this one was a poor race indeed.
250's were good though, Lorenzo is the man.

But on the plus side, I'll be catching a bus to catch a train, to catch tube, to catch a plane to get a taxi ride to see you boys in about 15 hours.
(Some bright spark booked my flight at midday, thus meaning I need to catch the first train in the morning, meaning I need to catch the last bus tonight).
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I don't even bother with mine on the road any more either... Much rather have a comfy 600RR to use for that!

I agree the MotoGP bikes are a bit girly now. It would be solved if they took all the silly traction this and that away and made them proper GP bikes again. I bet the last 2002 NSR500 with Rossi/Pedrosa etc on board, 2007 Michelins and 07 electronics would run rings around these pesky 800's bore strokes... Only 25 bhp down now. The 250GP race onthe other hand! Crikey!
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NSR300R - Why did i ever have a 250...

Unfortunately the only MotoGiPsy race I watched (part of) last year was crap, and just reconfirmed my opinion of the new "premier" class.

Yesterday I was staring through the screen a number of times, and if it hadn't have been for the pure caffine/cocoa hit I was getting from my iced chocolates I'd have fallen asleep at least 3 times!

I couldn't even tell you what happened for 99.9% of the race! Only thing I can remember is one super-motard moment as one of the bikes was backed in at the end of the home straight across the blue/white curbs!

Where's that yawning smiley when you need it?!
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RS250 pistons are good for 300 miles and the crank is good for 1200 or so. With the added weight of the NSR, you might even have less miles. Then, you have to bump start always, use tape on the radiator to modulate temperature and a few other things. Definitely, not worth it imho.

Joel
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1994 MC28 Rothman
TSR250 AC28M

Just like to say a big well done to
young Eugene for liftin 2 points
in yesterdays g.p.

Not bad when you consider his
over the counter rs is 20kph
down on Lorenzos' prilly....

Keep 'er lit!!!
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They're all quick before they nip!!!

Matey that finished in 12th (Ratthapark Wilairoj) is also riding an over the counter RS250 and his top speed was 23kmh down on the lolly sucker!

Hmmm, a rather steady 250kmh (155mph) down a 600m straight. Hardly gonna ruffle your hair is it

are they so much need maintanence,because engines are so high stressed?

if u mod a nsr engine to 60+ hp do they become unstable, and last not long also?

An NSR250 was actually made to put out around 60hp. It was just the silly Japan laws that saw them put out the measley 40 something ponies.

At 60hp the NSR is hardley stressed, but that isn't to say it'll still be a reliable commuter tool. It is a race rep after all.

At 40hp the internals are barely being tickled, so you could pretty much ride it full volume all day.....allegedly!

You only really start giving the NSR motor grief when it gets to high 60's or 70hp. One of the major factors is the piston weight at the sort of rpm required to make top hp. That's when you need to start thinking about RS125 pistons, as their relative lack of weight gives the crank and all related parts a much easier time, even with engine speeds approaching 13,000rpm and beyond.

beyond, beyond... thats where they start to sound good!
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If I have to take the carbs off once more...