New exhaust and end can joining.

[ProXimaCore]

Hello, I was wondering if someone would be kind enough to help me with this...

How do I seal an end can to the exhaust? I have the 2 new parts but they aren't welded together or anything and they come apart. I assume they can't just be put together as they are.

Also, I've been told to get the Jets changed for putting it on. Then when I asked the guy in the bike shop today he was told by the manufacturer of the system to leave it as it is. It's an 'Arrow' exhaust for a 'NSR125R'. Anyone shed any light there?

Just got my bike Serviced and new chain and sprockets fitted, so today seems like a good day to derestrict the thing.
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing

[AcIdBuRnZ]

Hey mate how you doing?

Sounds strange that it came in bits. From all the pictures of Arrow and Jolly Moto exhausts for the NSR they seem to come as a complete unit, just like standard one. Sorry can't offer more help.

Maybe just get local garage to weld it?

Let us know how you get on.
Mark
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Past: Honda NSR125R >> Kawasaki ER-5a2 >> Kawasaki ZZR-600e1 >> Suzuki GSXR-750Y >> Honda VTR 1000 Firestorm
"Chickity China the Chinese Chicken..."

[ProXimaCore]

Well I got it used rather than buying it new. Doesn't look like it's ever been welded together but they do fit together quite tight. I don't want to go ahead and just put it on incase it should be welded.
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing

[rossi_46]

Hi, i sold him this exhaust, i had it on my NSR125r, this is the correct one for his bike.

I suspect the reason for the end can being separate is because you can get a replacement end can, crash damage and the like.

To seal the exhaust, i used that thin tape that when heats up, it forms a seal, cant remember whats its called, but does the job.

On the jetting side of things, at your own risk, put the exhaust on, and not jet it.

I would recommend that you do, get a dyno session booked, to have her running sweet.

Honda supplied me with this system, and they told me, that it didn't say to jet it, but when i rang every where else they all said , you don't jet it, it will blow.

I also got the power valve to open a bit later, which worked down a treat.

Hope this helps.

[ProXimaCore]

That's some good info. Thanks. Do you remember what jet size you used when you had it fitted?

Anyone know the name of that seal tape is that Rossi_46 mentioned?
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing

[Dr Nick]

[AcIdBuRnZ]

Might be wrong but I don't suppose re-jetting would really matter on a 125 would it?

It's not like it's high tech engineering or anything.....

Mark
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Past: Honda NSR125R >> Kawasaki ER-5a2 >> Kawasaki ZZR-600e1 >> Suzuki GSXR-750Y >> Honda VTR 1000 Firestorm
"Chickity China the Chinese Chicken..."

[Gti]

That stuff about it blowing is pretty bo*locks I think.
The manufacturers would say it needed jetting if it really did or everyone would sue them for damage caused to their bikes, makes sense?

There might be a very slight beneficial gain to re-jetting it.......but that gain is about the same as you would get from the aftermarket exhaust anyway....... i.e 1/5th of fu*k all.

[G]

25hp from a 125... so that's 200hp per litre.... F1 cars that rev to 18k rpm with all sorts of fancy bits only make a bit under 300hp per litre I believe . (Okay it's not that complex engineering, but it relativly a pretty highly tuned engine, so things like jetting etc can make a fair bit of difference if you do lots of other little bits.

The majority of full systems are designed to work best with rejetting at least. Even with an end can it's usually best to get some work done to make full use of it anyway.

[ProXimaCore]

I've also stripped my bike down just now and I was about to take out the Intake Restrictor. Should I take it out now or should I wait till I can get the new exhaust on? The original one is still restricted.

p.s. that little tray thing will NOT tilt back! Any tips?
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing

[Laura]

Just take it out you may aswell my restrictors are coming out today.
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Good girls ride motorcycles bad girls thrash them.

[MarJay]

Um, on the subject of rejetting, if you don't rejet you might run dangerously lean and then your engine will seize...

2 strokes are actually MORE tempramental as far as that stuff goes than 4 strokes.
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British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

[rossi_46]

[Dr Nick]

It's the same as the RS50 arrow exhaust, the reason why i didnt get it. The RS125 and Mito got a new bigger exhaust system .
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is that it

[Kickstart]

[rossi_46]

Hi, kickstart, when this happened to the two other nsr's , they came to me, and said would i go up to the dealer with them, if there bike blew up, and mine didn't , i could maybe show them the difference on the dyno report.

The Honda dealer was not looking to fix it for them, but, when I showed them Dyno graph before the jetting took place, it was running lean, and the after which the jet change took place, was fine , a nice clean line.

At the end of the day, there Honda book said no jetting was required, which if was true, the problems would not of been caused.

Apart from this , Honda aren't stupid with things, I love Hondas to bits, hence i've always had a Honda of some sort.

[Kickstart]

[rossi_46]

I was the only one that went to a non-honda dealer, because there isn't a Honda dealer in Northern Ireland with a dyno, belive it or not.

I went to Philip mc Callum, you may of heard of him, had
a good dyno, does a top job.

[ProXimaCore]

I just pulled out what should be the intake restrictor. I'm not sure though. I've got down to the place where it was meant to be but instead of a plate being there with a circle hole in it, there's this pyramid type thingy I've pulled out with 6 white flexible plastic bits on it. What the hell is that?
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing

[Korn]

Erm, that's the reed block... put it back!
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3516 Miles, 11 Countries

[ProXimaCore]

I figured it'd be something like that.... Where should the intake restrictor be in relation to that?
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing

[rossi_46]

This is the best resource to look at , shows what plate you need to take out.

https://www.nsr125.com/derestrict.htm

[ProXimaCore]

That's what i've been working from, but that plate isn't there. The first thing I came to was the reed block. The reed block hole seems to get smaller towards the end like it has the restrictor built into it. Is that just normal? Does it appear to be derestricted there already then?
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing

[Korn]

If the plate isn't there then it isn't there... The reed block is supposed to be that shape and the white plastic piece isn't a restrictor, it serves to smooth the flow of air.
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3516 Miles, 11 Countries

[ProXimaCore]

Brilliant! Thanks for the help on that one. On to the exhaust now....
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Honda NSR125R -> Suzuki GSXR400R GK76a -> Kawasaki ZX636 B1H -> Honda CBR400RR NC29 -> Nothing