NRG / Speed

[davidkent89]

Hello all.
Got an NRG MC3 Sport Series.
Its a late 2004 model (54 plate - December 04)
Got the variator washer out, and exhaust restrictors have been cut off.

Now off the exhaust is another pipe going to some kind of unit, which i'm not quite sure as to what it is.
Will removing this effect the bike and will it make it go any quicker?

Also what other restrictions are on the bike? How can i remove them? etc..

And are there any internet suppliers that are fairly priced, that would supply a Chrome leo vince ZX with everything required to run it to its full potential?

Cheers
David

[haGGard]

That would be the CAT if im not mistaken. There IS a way you can block it up, and it would make a difference, but im not sure how to.

I would wait for someone more experianced to reply...
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[SoND]

There is one in the variator/clutch

The standard exhaust is restricted.

When you put the power pipe you wont need the catalytic converter. My mate got his fitted at the garage so I'm not sure if it got plugged up or not.
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[Biker-Kev]

try www.taffspeed.co.uk for parts. Ebay is also good. When you get an exhaust you will get variator rollers supplied to swap with standard ones. You might need to get a new variator, as i did. I would recommend the Mallosi one and mallosi drive belt.
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[davidkent89]

Yeah, i know the variator has a washer - i removed this straight away, and the exhaust has been derestricted, all bar the cat.
With a new exhaust it wouldn't be connected up as theres nowhere to put it.

Will look on that site for parts now and see if there are any reasonably priced things for me.
Cheers
David

[davidkent89]

Also, is there a throttle restrictor?

Oh, and when I got the bike about a month ago (19 December) , it had 292km on the clock. It now has 3002 on the clock, and the throttle seems to have about 5 - 10 mm of freeplay at the start.
Is it getting to the time to get it adjusted?

It had its first service on 1400km, but i'm not sure if it was done then.
Cheers
David

[Jack_Cheese]

There is no throttle restriction - just the appendix on the exhaust, and the variator restriction. That pipe coming off your exhaust goes to the carb and is part of the air recirculation system. This feeds some exhaust gases back into the engine to oxidise CO into CO2 in the cylinder, thus lowering the emissions. The catalyst is a platinum plated mesh inside the silencer, which helps carbon monoxide react with unburned oxygen.

If you want to fit an aftermarket exhaust, remove the air recirc system. Taffspeed will be able to help you with this, they had lots of fiddling around with their zip 70, which uses the same engine, gearbox and chassis.

If you modify the exhaust, then re jet the carb. I'd recomend getting the jet sizes off taffspeed of another scooter tuner, and information about removing the air recirc system, and fitting a performance exhaust, just to save the bother of chopping and welding yours. A Haynes manual probably has information on how to remove the air recirc.

Jack
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[davidkent89]

Cheers will have a look at that - Think i might have to invest in a leo vince - make things a bit easier.
Do ZX's on NRG's need the carb Re jetting?
Also do they need rollers and clutch springs?
Cheers
David

[Jack_Cheese]

They come with rollers - leave the springs alone. It will need a new jet, too. And if you buy a leo vince, rub it down to bare metal, then get some very high temperature/barbeque paint for it, cand coat the bloody thing. They disintegrate like crackers in a washing machine.

Jack
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[davidkent89]

Was thinkin a chrome one - if kept clean they aren't half as bad as the iron one apparently
David

[Jack_Cheese]

Yeah, i forgot they did a chrome one

It'll still need a bit of cleaning, but my original exhaust rusted like a bitch anyway.

Jack
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[davidkent89]

yeah well i'm not overly impressed with my standard exhaust!
54 plate and its only done 3100km now, and its rusting - mainly surface rust as it is at the min, but won't take long to finish off!