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fitting an exhaust


Moomintroll
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Hi


I'm new to the forum :D Ive just bought a Jialing 125, 1999 for a couple of hundred quid to trot about on when the sun is shining and to see how much I enjoy riding a bike after owning a 50cc Suzuki some 30 years ago... I know its Chinese and its probably a pile of poop etc. but it runs pretty well, I assume anything that is going to fall off will probably have done it by now and it will do me ok until I decide to give it up or take my test and get something bigger. The problem I have is that I got a flat, someone offered to repair it for me, couldnt do it, lost the the flange off the exhaust and I'm now left with a bike with a flat tyre and no exhaust!! Not pleased.. I figure I can probalby put the exhaust back on my self so Ive purchased a new flange and gasket. Can anyone give me any tips on fitting it? i.e. the order of the various bits, the part that is confusing me is a split collett, Im not sure how/where this part fits, eveything else seems pretty straight forward. Thanks in advance for any advice!!

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Hi


It was the rear tyre so they took the exhaust off to take the tyre off. It all became a bit of a farce and something I'm trying to put behind me!! Two weeks since my cbt and i have only been able to ride the bike once!

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You still shouldn't have to take the exhaust off to take the rear wheel off. The swinging arm, and therefore the rear wheel moves with the suspension, and the exhaust is fixed to the bike. The general movement of the suspension would snap your exhaust clean off, if it were attached to the rear wheel/swinging arm in anyway.


I seriously suggest not letting people who think the exhaust has to come off to take the rear wheel off near your bike again.

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looking at this picture is it possible they took the silencer off (not entire exhaust) to get easier access to rear spindle nut? http://m.bectrade.com/p/08/11708_Sell_125cc_motorcycle_JH125_7A.jpg


I know on my Bike I cant get a socket on the nut and have to use a spanner which is a pain when it comes to torquing it back up :(

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I think the exhausts on cheap 125's will all be one piece, like on the CG.


Even if they did take the silencer off why would they have lost the flange that fixes the exhaust to the cylinder head?


My CG was tight but I found a ring spanner would slip on the wheel axle nut. Then I could tighten it from the other side, and nip the final bit up.

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Its the whole exhaust, the bike is a copy of an early Honda, CB I think. Dont worry, I definatley wont be letting him near it again, i was just in a real fix stuck in a car park on a Sunday with no way to get home!! Im still a little confused about the collet, does it sit outside the exhaust inside the flange? It would probably make sense when I take a look at it.

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And that's my point, I have never been aware of a bike where that should be the case. So should the exhaust come off to adjust the chain tension? You need access to the nut for that. Seems like a pretty bad design flaw, a routine job like adjusting the chain, which would take 5 minutes, is turned into a 45 minute job by removing the exhaust every time. I'd say its more likely the op's friend had neither the correct tools or know how to take the wheel off, hence the advice not to let him near it again.


Op the exhaust gasket goes in the opening on the barrel, check the old gasket is out first, then the exhaust goes against the gasket, if you look at the end of the exhaust it will have a collar on it. The collets then go against the collar, with the split either side of the exhaust bolts, then the flange on top. You'll wish you had three hands. You'll see when you start the bike if you've done it right, no exhaust fumes should leak from the exhaust.

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Hello Moomintroll. I am just up the road in Northiam and Wednesday I will be in Hastings between 1100 and 1400. Would you like me to pop in or can you ride the bike up to Northiam?. I know a little bit about motorbike exhausts!!!

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as your new to the forum I will say that Alan (megawatt) is the resident mechanic for the forum and can usually be found at the annual rally taking someones bike apart and fixing it for them :D

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Hi


Would be great if you could pop by? I cant ride it to you, no exhaust :-P I'll pm you, glad I came on here now! and nice to have a reference for you....

 

Put a 'Harley' sticker on it and away you go!


But seriously, Alan is close enough (and willing enough) to help.


For anyone else with the 'silencer in front of the spindle nut' issue - This can usually be got round by either:


a) sitting someone heavy on the bike while you 'crack' the nut (or final torque on re-fit) or,


b) put the centre stand on top of a (stable) block and the wheel should drop down enough (with a small weight on the handlebars to lower the front of the bike) to allow access.


I would not consider taking off the exhaust (if it is one-peice) due to the 'pain' of fitting it back on again.


:cheers:

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Hi


Would be great if you could pop by? I cant ride it to you, no exhaust :-P I'll pm you, glad I came on here now! and nice to have a reference for you....

 

Put a 'Harley' sticker on it and away you go!


But seriously, Alan is close enough (and willing enough) to help.


For anyone else with the 'silencer in front of the spindle nut' issue - This can usually be got round by either:


a) sitting someone heavy on the bike while you 'crack' the nut (or final torque on re-fit) or,


b) put the centre stand on top of a (stable) block and the wheel should drop down enough (with a small weight on the handlebars to lower the front of the bike) to allow access.


I would not consider taking off the exhaust (if it is one-peice) due to the 'pain' of fitting it back on again.


:cheers:

and when refitting the spindle fit it the other way round so the nut is behind the exhaust and you withdraw the spindle out the other side

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Bike is now sorted thanks to a very helpful and talented megawatt!!

Back wheel is back on, exhaust is back on, everything has been adjusted and checked and the bike has been given the once over so I'm back on the road :D

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