deresticted nsr not getting good performance

[ayfy]

I've just finished derestricting my NSR and just took it out for a test spin. I think there's something not right. Above 7k revs it's fine and pulls really well, but below 7k it just gets bogged down, sometimes it gets bogged down so much it never goes above 7k and I have to change down a gear. I'm assuming this isn't how it should be, any ideas of what could be wrong?

something I did notice was when I took the intake restrictor out there was another part that came out too, looked like it had a filter on it of some kind, I'm assuming this should be left in there and is not part of the restrictor???

[mr jamez]

Sounds like you have taken the reed valves out! You really need to put them back in, the only thing to remember is to have the tab on them facing up and that should sort your problem.

[gsxrpeak]

did you make sre you put the air box back properly? i managed o scrample up some of the filter once and had the same prob.
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[alains]

part 3 is the resctrictor plate (which has to be taken off)
part 1 is the reed valve , which must be refit (the sharp part inside the barrel)
part 2 is the seal which is to be refit beetween the barrel and the reed block
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the worst day fishing is better than the best day working

[ayfy]

[alains]

no , the fixing is equal on both side .
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the worst day fishing is better than the best day working

[alains]

probably you are restricted on the RC valves control box and CDI , pass me a pm with your serial number i will try to find out which kind of restrictions you have
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the worst day fishing is better than the best day working

[ayfy]

my bike is a 2002 uk spec so I guess is shouldn't be restricted in the CDI. Is the CDI the bit to the right side of the airbox bolted to the frame that looks like a CPU processor? It says SH693-12 on it, don't know if that helps or not.

another thing is when I took the airbox out I put it on it's side, I don't know exactly what's in the airbox but could something have got dislodged in there that's causing my power loss at low revs?

[mr jamez]

The CDI on the later models is under the seat, the black box under the fuel tank will be the power valve actuator.

The airbox is just plastic tub, nothing inside to come loose. Have you checked the airbox hose to the carb is on properley, no air leaking? also it is a good idea to replace the gasket when you remove the rubber intake manifold and reeds etc, check around that area for leaks as well. Other than that I can't really think of anything, unless you need to alter the jetting after derestricting the bike? not sure.

[alains]

allright but , which is important are the letter after the ZDCJC22B.......... which determine for which country it has been built with which restrictions . if i got that , i will be able to help
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the worst day fishing is better than the best day working

[ayfy]

this is really annoying, I took everything off again that I took off before and but it all back, checking absolutely everything. No difference. I did notice that the choke cable sticks on and I thought that might have been the problem but little difference.

from the problem I've described, ie. not pulling very well below 7k revs, does it sound like it's restricted somewhere else or is there something wrong with the bike? It's a 2002 UK bike so shouldn't be restricted other than in the exhaust and intake, anyone else derestricted a uk nsr of this age?

BTW I sent you a pm alains.