What the **** is this?

Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

Just trying to derestrict my NSR125, taken off the airbox & carb & inlet pipe hoping to see the restrictor plate in there, and this is sitting there!!?? what the fuck is it?!?! lol. is it some sort of restrictor, or am i a complete twat and it is supposed to be there.....

(sorry about the huge pictures, but i didnt want to make them small as it will be harder to see what it is im showing)

https://homepage.ntlworld.com/lee.heap/My%20Bike%20001.jpg

an angle view of the strange thing Smile

https://homepage.ntlworld.com/lee.heap/My%20Bike%20002.jpg

Kris · World Chat Champion Joined: 03 Feb 2002 Karma :

what the fuck is that...............

mine didn't look like that Very Happy

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NSR125RR - ZXR750H1 - ZX9R E1 - GSF600S - GSF600SK3 - VFR400-NC30 - SV1000N - ST1100-R - CBR900RR-R - GSF1200SK5 - GSF600SK1 - VFR1200FA - GSXR1000K2 - ZZR1400 D8F
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Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

Crazy Manx Man · The Fly Swatter Joined: 26 Oct 2002 Karma :

looks like the airbox has chewed up dean's cock...amke me wonder what it's doing around there for.
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TGE125NSR · Banned Joined: 07 Jul 2003 Karma :

LOL, i had a few of W.T.F moments with my NSR today.

Isnt that the restrictor? that white thing with the small hole in it?

The thing its attached to is the reedblock right.

Looks like the normal restrictor in the de-restriction guide of this site to me?

Confused

Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

LOL!

Anyway, should it be safe to remove this and put everything back together? that gold thing im holding up was where the intake restrictor should be Confused

Also just noticed the carb says [b]PHBH28[/] on the side.........is this of any significance?

Cheers guys Razz

Lee

Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

one1895 · Posted: 15:40 - 22 Jul 2003 Post subject:

It doesn't look like your bike was restricted in the first place. The hole in that 'thing' you pulled out looks the normal size for a derestricted bike. If there wasn't a thinnish plate before you got to that then it probably wasn't restricted.

Cam.
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Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

Kris · World Chat Champion Joined: 03 Feb 2002 Karma :

personally I think its just a new typoe of restrictor. Pull it out and throw it away mate.

The bit remaining looks like mine did so I think Honda have just used a new design to be honest.
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NSR125RR - ZXR750H1 - ZX9R E1 - GSF600S - GSF600SK3 - VFR400-NC30 - SV1000N - ST1100-R - CBR900RR-R - GSF1200SK5 - GSF600SK1 - VFR1200FA - GSXR1000K2 - ZZR1400 D8F
www.prisonplanet.com

one1895 · Posted: 15:50 - 22 Jul 2003 Post subject:

See if you can take the gold part of it off, if you can then you could try slotting it back in there without that. Then see how it runs.

(only taking out the intake restrictor won't make much different at all to the speed - you wanna take the exhaust restrictor out too.) Very Happy

Cam.
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Demonic69 · The Pink Rhino Joined: 31 May 2002 Karma :

Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

Ok panic time...........
left that part out, and put everything back together. Bike wont start Shocked

Took everything apart again, put that part back in, and put everything back together.....................bike still wont start Confused

Have made sure fuel is on, and connected, have made sure engine stop is not pushed in, but when i push the started it just turns over and over and over.......almost as if it is out of fuel (but it isnt!)

Any suggestions?
Crying or Very sad

Demonic69 · The Pink Rhino Joined: 31 May 2002 Karma :

Stick on a bit of choke, it's probably just trying to get fuel through the lines. or check the spark-Plug Very Happy

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Demonic69 · The Pink Rhino Joined: 31 May 2002 Karma :

And that's a prepoerly restricted Reed block matey. The gold bit's the Reed. try to remove the white bit but please put the Reed back in
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Zimma · Wheelie Junkie Joined: 04 Feb 2002 Karma :

Umm simple answer, it's not a restrictor. Very Happy

We had those on our nsr's, leave em in Smile

I'm sure Keith can tell us exactly what it is, but from what I know it's something to do with helping keep the fuel/air mix flowing smoothly Smile

(Don't hold me to that description) Very Happy

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-Zimma

Demonic69 · The Pink Rhino Joined: 31 May 2002 Karma :

I think Zim's right remembering when I tried to take mine to bits Very Happy

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TGE125NSR · Banned Joined: 07 Jul 2003 Karma :

Just looks like a normal reedblock to me. Those flaps are the reeds right?

If it doesnt start its because it takes about 5 minutes to fill up the carburettor and fuel lines and get into the reed assembly.

If you take the spark plug out it should be wet, if it isnt then the fuel isnt getting through.

What fun Rolling Eyes

Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

Got it started........just left it 10 mins and it started first time. weird.

TGE125NSR · Banned Joined: 07 Jul 2003 Karma :

The PHBH is the model of your carb and 28 is the size, 28mm.

It probably isnt restricted in the inlet manifold, have you took the throttle slide out of the top, there could be those 3 farty washers mangled into the spring which just fall out in your hand once you remove the slide?

Is it a UK bike or an import?
Confused

kevo · Cop Seeking Missile Joined: 26 Aug 2002 Karma :

Hi Lee,

That's the reed valve. You certainly need it to control the fuel flow. Don't remove it, put it back in.

Regards,
Kevo.

kev · I Hump Things Joined: 07 Oct 2002 Karma :

thats your reed valves. dont take them out or your bike wont run and it will flood the engine up
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Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

TGE125NSR · Banned Joined: 07 Jul 2003 Karma :

The 28mm isn't the jet size.

Its the overall size of the carburettor. Mopeds have 12mm or 17.5mm carburettors.

Smile

Keith @ Work · Guest

Hi

That is the reed block. The reed valve allow air into the engine but not back out again. Basically a one way valve. Depending on the bike it may run without it, but probably not (piston ported engines don't have them, nor do disk valve engines, but the NSR is a crankcase reed valve engine and the piston has no effect on the intake porting).

That does look about right for a full power bike. For best performance it should be a smooth transition from the rubber carb block into the reed valve cage.

The reason the bike didn't start and then did is probably because you flooded it the first time you tried to start it without the reed valves in place.

My old MBX wouldn't run once. Could get it to start and then idle, but any throttle and it died. Spent ages fiddling. Finally noticed the reed valves sat on the bench in the garage. Teach me for finishing putting a bike together as it was getting dark.

All the best

Keith