De-restriction

Guest · Posted: 12:31 - 04 Apr 2003 Post subject: De-restriction

I'm use to riding something a bit larger, but my bike is currently off the road so I'm using my girlfriends NSR. It's still in it's stock restricted form as she's still a learner, I was thinking of taking the plate out by the carb but leaving the exhaust as it is (so I can give it her back after I've finished). Is it worth doing without doing the exhaust? Will it make a performance difference or is it not worth it? I want to be able to give it back to her restricted so she doesn't moan, that's why I don't want to remove the exhaust restrictor.

Cheers

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

it will increase the performance. it will hit over 100 with the restrictors out, and 0-60 will be about 6 seconds

imo derestrict it and both of you use it then Very Happy

just tell her you got it service or something Razz

dainesefreak · World Chat Champion Joined: 04 Apr 2003 Karma :

for that, just wondered if only removing the carb restrictor makes any performance difference or whether I need to do both.

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

exhaust makes most of the difference.

you really need to do them both, to make it be running right and properly

dainesefreak · World Chat Champion Joined: 04 Apr 2003 Karma :

again, I'll try and pursuade her. I've just had my 02 Blade written off and am using the NSR for work and it's killing me riding it restricted!!

Alex_NSR · L Plate Warrior Joined: 05 Apr 2003 Karma :

Yer I've ordered my NSR and like the sound of 0-60 in 6seconds..that would burn off alot of cars, and on a 125cc thats special.

It's a NSR-RR. so I assume it will be fully restricted when it arrives?

Will I find a dealer who will do a proper job even if they know it's illegal? Or will I have to find a back street garage to do it..oh yea and how much did it cost people just for the exhaust?

And is it possible for police to take your bike away and check it, for example if they caught an NSR at 100mph plus and they knew a restricted bike did 75mph can they take it to the crusher? mmm I suppose it's safe to stick to 75mph, and enjoy the fast 0-60?

MadOne · Banned Joined: 04 Mar 2003 Karma :

Nah... Do it yourself! All this tuning and testing is cool... and afther that when its time to taste yer tuned bike.. oooh it feels great Razz

belive me!!!

I removed carb restrictor, exhaust restrictor and now I forced power valve to stay open all the time.. It does 0 - 60 about 4 - 5 seconds!

Some guys told that forcing power valve to stay open will cause serious engine damage... but its crap Razz

it wont.. there is no logic.. at high rpm-s the blackbox will open power valve anyway.. so why not to get more power on lower rpm-s ? Just remember to use the best oil u can buy for yer baby...

I belive that u wont buy old flowers for yer girl ay? Twisted Evil

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-MadOne-
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G · The Voice of Reason Joined: 02 Feb 2002 Karma :

Alex:
IS the bike you ordered an import?

If so best advice is to cancel the order ASAP.

I don't know of anyone that's got an import properly derestricted.

If not, do it yourself... should cost about £1 in drill bits.
IF you're unsure there's probably some one on here that can help.

MadOne · Banned Joined: 04 Mar 2003 Karma :

Yea just watch out that u wont get any crappy restricted braindead CDI unit...

My nsr is import too but CDI aint restricted...
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Ant · World Chat Champion Joined: 24 Feb 2003 Karma :

MadOne · Banned Joined: 04 Mar 2003 Karma :

U know when u ride with it..

rpm-s are restricted... like 8k rpm max, 9k rpm etc. (depends on gear)

Well.. you canot say RR models! Bechause R/F (fairing/nofairing) and other R,Y,X,Z,K,L (Its just year marking.. like NSR125R 2000 but u can write it NSR125RY)

So u really never know which model is restricted by cdi and which one is not!

If u can see your rpm`s hiting red area then it`s not restricted by cdi! Twisted Evil

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raps · Nitrous Nuisance Joined: 03 Dec 2002 Karma :

Not to sound too stupid, but exactly what needs to be done to the bike, in order for it to be fully restricted.

I know im buggered cos my bike is a Honda NSR 125 RR import from Italy Sad

Anyways, info on full de-restiction would be appreciated.

Thx

MadOne · Banned Joined: 04 Mar 2003 Karma :

If you have restricted CDI unit then one way to pass it is to cut blue wire! but cut it so u can repair it later.. in case its wrong wire! But it should be right one.. its no "-" (negative) wire.. shouldnt be!

1. Carb restrictor
2. Exhaust
3. Power valve.
4. CDI
5. Sprocets (depends what do u seek.. speed or acceleration)
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MadOne · Banned Joined: 04 Mar 2003 Karma :

I find that power valve is most pointless thing to add on a bike.. gizuz.. i understand that some 1300 or 1000 cc beast needs it so its more comfortable to ride but 125.. god help Razz

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Robby · Dirty Old Man Joined: 16 May 2002 Karma :

your such a fecking eejit.

why do you think all the companies add powervalves to their 125cc strokers? its not for decoration.

powervalves increase bottom end power without sacrificing top end rush, by varying the back pressure on the exhaust. study how 2 stroke work to understand more, but the back pressure and wavelengths are of the exhaust is important for making power.

1000cc monsters dont have powervalves, and dont need them. small 2 strokes need them to have a spread of power, big bikes dont.

so if your bike runs better with the powervalve disconnected, its fucked.

MadOne · Banned Joined: 04 Mar 2003 Karma :

D00d.. go learn more abt it! then come back and start to yell that im somekind your such a fecking eejit... damn lameass!
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cagiva gezzer · World Chat Champion Joined: 17 Mar 2003 Karma :

Taking the crap out of the intake will not make much difference without doing the pipe aswell. IMO it will just make throttle response slow and sluggish. It will go from a nippy, can that word be used?!, slow thing to a sluggish slower thing.

Leave it. Ridding a slow bike will improve your skil coz you will have to keep your momentum up. Plus, it will make your Blade feel even faster when you get another one!

Powervalves.

You are both confused eejits.4T Pv's vary back pressure to make use of resonance in the exhaust.

I cant spell, i know.

2T pv's alter the exhaust timing. NOTHING to do with back pressure. Thats the expansion chamber/pipe.

They keep the timing low for low down power and torque, then raise the timing for top end power. Bit like VTEC, but not, if you get me.

If youve ever ridden a bike with a jammed valve, either open or shut, you will understand how much difference they make.

Rant over.
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"because one stroke isnt enough and four strokes waste two"

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

dainesefreak · World Chat Champion Joined: 04 Apr 2003 Karma :

It was me that was talking about de-restricting my girlfriends NSR. I had four de-restricted strokers over a six year period. So I'm use to hussling the little buggers along, but 70mph in 11 seconds is doing my head in. I was only asking if there was any benefit doing the derestriction by the carb, I don't want to do anything that's not easily reversable. Can't wait to get the Blade back though, oh to have acceleration again!

Cheers