NSR de-restricting PLEASE HELP!!

wantser · Trackday Trickster Joined: 04 Oct 2004 Karma :

Hey there, wondering if anyone can help me out.
I am trying to de-restrict my NSR RR UK bike. I have read up a bit and desided the other night to have a go. I took the carb off and the rubber housing to reveal what I thought was the intake restrictor. From the pictures however it looked completely different to those brass coloured plates with the hole in it. It was a wedge shaped piece with a filter like material over the pionted end that sat in the intake shaft. The pictures I have seen of de-restricted bikes show nothing here so I took it out, put the rubber (four bolt) carb connector back on and rebuilt. Bike didnt start and I am unsure as to why. So i put it back and it started first time. Any ideas? I am yet to take the exhaust restrictor out.....should this stop the bike from starting if the inlet restrictor is removed?
Got to be some people out there that know what their doing.....Please help!!!! Very Happy

swampy · World Chat Champion Joined: 04 Aug 2004 Karma :

It wasn't the reed valve block that you took out was it ? I don't know too much about the NSR RR's but it might be yours is either already derestricted, or restricted in a different way to other NSR's. Thumbs Up

____________________
"I hate to advocate drugs, alcohol, violence or insanity to anyone, but they've always worked for me." Hunter S Thompson
"Faster, faster, faster, until the thrill of speed overcomes the fear of death..." Hunter S Thompson

Ste · Not Work Safe Joined: 01 Sep 2002 Karma :

The exhaust and carb restrictors work independatly from each other, you can remove either or both of them and it'll work fine.

Believe that was the reed block you took out by mistake. When you're taking it to bits it will either look like the before photos on nsr125.com or like the after ones.

wantser · Trackday Trickster Joined: 04 Oct 2004 Karma :

Sounds like the reed valve then! Oops!

If it is already de-restricted its very poor performance 75 top 0-60 an age! about 12 secs.

Ste · Not Work Safe Joined: 01 Sep 2002 Karma :

Nope, thats the performance they give as restricted.

wantser · Trackday Trickster Joined: 04 Oct 2004 Karma :

there is no restictor on the intake then. I am sure of that! drat...must be restricted some other way. Confused

swampy · World Chat Champion Joined: 04 Aug 2004 Karma :

What you're looking at removing in the fuel intake is a rectangular piece of shiny metal with a hole about 40mm across in the centre. This is found between the rubber bit and the bit that you have already taken out. It may be that someone has already removed this, but not done the exhaust derestriction yet (which is easy enough took me about half an hour the other day) and hence the effect on your performance. The trouble I have is having deresricted the exhaust, I cant do the air intake 'cos two of the bolts have been replaced with tamperproof ones, and I need to wait until I can get a stud extractor to get the buggers out Sad

____________________
"I hate to advocate drugs, alcohol, violence or insanity to anyone, but they've always worked for me." Hunter S Thompson
"Faster, faster, faster, until the thrill of speed overcomes the fear of death..." Hunter S Thompson

Ste · Not Work Safe Joined: 01 Sep 2002 Karma :

Wanster, your bike from what you say does have the air intake restrictor present. There have been other people who have come on asking the same question as you have saying that is the only thing they can spot which could be the restrictor. It is there. Thumbs Up

Swampy, 30 minutes to remove the exhaust restrictor? Shocked

Remember it taking a couple of hours of poking the thing on mine and others as you have to drill each of the welds out (and break lots of drill bits doing it:lol:), file them down enough to be able to fit the restrictor out and then get the thing out. 30mins is impressive. Smile

swampy · World Chat Champion Joined: 04 Aug 2004 Karma :

wantser · Trackday Trickster Joined: 04 Oct 2004 Karma :

right looks like I'll be taking it apart again. I have deffinatley not seen a shiny plate with a whole in (had a look at nsr125.com).
Sounds like i better go stock up on some drill bits!!! Very Happy

paul · Renault 5 Driver Joined: 04 Jul 2004 Karma :

I had this with my nsr, I looked for the intake restrictor, wasn't there so then I looked for the exhaust restrictor and it wasn't there either. I have the same performance as you and have a cdi restriction so if the exhaust is not restricted you may be looking at this kind of restriction. But seeing as yours is a UK spec then I'm not sure if this would be the case but anywhere I just thought I'd let you know as I have heard that the RR models do have this restriction.

Paul