Hi All. Recently bought a mc18 r5k. Gave it a quick thrash on the road and found it to be a bit slow. Would only pull 100mph. So spliced the orange/blue & black/white wire. Made no difference Done a track day at donington the other day and found the bike embaressingly slow (tried to make up for it round the twisties though). Any idears what i should do to make it faster??? I've had a go at resetting the power valves but it still won't pull more than 10,000 rpm which equals 100mph. Any help apreciated.

Will it pull past 10,000rpm in other gears?
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Andy.
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have u done the wire splice mod to the gear postion sensor as this made a good improvment on my mc21.

rsvr1000dan wrote:So spliced the orange/blue & black/white wire. Made no difference .

the splice you mention sounds like the MC21 splice, is it the same for the 18 .
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It's the same mod as the MC21 for the Mk2 MC18. The Mk1 MC18 has a bullet connector that needs disconnecting.

There isn't a G.P.S. on the MC18, so you can't do that splice!
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Andy.
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Thanks for the ideas so far.
It hasn't got the gps wiring cord so can't mess about with that.
I think it revs through in the lower gears. Not really took much notice (next time i take it out i'll check it out).
Anyway i'll hopefully sort it out soon, then i will start to modify it. Have allready got a set of carbon fibre wheels i want some usd forks (anyone got some? and a decent rear shock?) Then a set of pipes and a race fairing and seat unit should have it looking sweet.
Anyone out there from the Aylesbury area???

You're probably going to find you need a couple of modest sized holes in the top of the airbox and a rejet to get the most out of your delimited MC18.

Really need to know how it performs in the other gears though.
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Andy.
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Arrrggghhhh. Aylesbury! Glad that I'm away from that place!!!! 23 years was more than enough.

Actually from Wendover, but close enough.

Back on track, I would say that it'll be best to get your 18 running right as it is before you start modifying it.

For some reason the 18's seem to be more critical than 21's and 28's when setting up the RC valves. In the past I've had a couple of static fiddles, with no great results, then just blasted it up the road, held it nailed in sya 4th gear and at max rpm hit the kill switch, just like a plug chop, only to find that the RC valves were a couple of degrees out. Dialled 'em in and was ready to rock.

Also, have a good look at your air filter, and get a new one if necessary. try giving it a wash in some mild detergent and warm water. if it falls to pieces then you're probably due a new one anyway. If it cleans up ok, don't forget to oil it when you put it back. MX shops are the best place to get filter oil as they seem to get through tims of the stuff.

You're carbs might also be in need of some TLC. this would be a good thing to look at anyway, whenever you buy a used bike, especially a used NSR. make sure the jetting is stock (if all other parts are stock) and squeaky clean.

With all things being in good nick, the 18 should be a real hooner, even in stock trim. Honda did a really good job of making every new model just that little bit slower. When we've restored 18's from the dead, we've always joked about the 'classic' styling, but never about the stock engine.