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Gettin the rear wheel off is easy... Just slacken off the tentioners, Undo the nut on the axle and let the wheel forward to loosen the chain. Slide the chain round the swingarm out of the way. Disconnect the brake , then undo the bolt completely for the axle. Slide the axle out (might be worth putting a block under the engine to keep the up) Keep any spacers in the right order You should have a spacer on the non brake side of the hub, Remove that and it should give you enough room to move the wheel away from the brake and out between the mudguard and the swingarm... Taking the tyre off might be a curse word...
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Cheers dude, I'll tackle it one evening this week, how do you make sure the wheel goes back on straight?!
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You have chain tentioners either side. Just pull the wheel back evenly. And then when the chain is tightish (not solid , It needs a bit of slack) make sure the tyre is an even distance from the swingarm both sides nearest the engine.
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seems quite a chunky motor for a small bike? I havent a clue how it works at the mo the engine looks like a wizards pouch of magic and dragons to me Lol the engine is the simplest you've ever seen. Yes, that's all. Oh, and you're missing the flywheel cover. Here's a nice downloadable service manual: 1977mopeds.com/PDFuploads/puchserviceweb.pdfAnything else please ask, i've driven these for about 5 years and still have one in parts in the attic. I've taken them apart and put back together down to the last nut and bolt.
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Last Edit: Nov 8, 2010 14:05:05 GMT by Mark16v
1985 MK2 Golf
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Brill thanks matey much appreciated, I've saved that PDF to my home comp should come in handy!
I'm just wondering a few basic things, I've got a new spark plug winging it's way to me what other serviceabl parts should I look at or check before I attempt to fire it up? I'm gonna drain the old fuel out of it and mix me up a batch of fresh stuff to fill the tank with. Is starting it as simple as hold the the third lever in whilst kicking down the pedal and the. If it starts let go of the third lever?
Oh, and does anyone know what size inner tube I need for the back tyre?
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I would have thought that you would want to get on and pedal to get it going, rather than just giving it a kick. I'm not really sure though, as I've never owned or ridden one. Mopeds of any kind are very rare beasts around my neck of the woods, because we've never had any legal loopholes about being able to ride them when you're too young for a motorcycle or anything like that, so people go straight to proper bikes. A friend of my dad's has a massive collection of old mopeds and the only time I've seen him start one he put it up on the centre stand and pedalled for a minute or two to get it started. Mind you, that particular one was probably 70 years old!
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I'd better get that rear tyre sorted first then before I try and start the snarling monster! Does anyone know how to understand the sizes of inner tubes? There are plenty on eBay but I don't know what size I need. Tempted to get wheel off tonight
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I'm from Holland, back in my time (13-14 years ago) everyone rode a moped or scooter from the age of 16. Personally i'd pull the carb off (loosen one screw on the inlet manifold) and unscrew the bowl to see if any curse word is inthere. Clean it and blow through the jet (there's only one, no idle jets or main jets or anything) and put everything back, preferably with a new gasket. Refit everything, set the gas switch on the side of the tank so it points downwards and push the black button next to the idle screw on the side of the carb a couple of times till gas flows out of it to fill the bowl. Switch on the electrics with the switch next to the gas handle (all the way to the right should do). Then push down the big black pin on top of the carb (choke), start pedalling with the little lever pulled. As soon as you let the lever go, the clutch kicks in and the engine should turn over. You can check if you have spark the same way you do in a car, with the spark plug outside the engine on a metal part while the engine is turning over. You can do all this on the stand so the rear wheel is in the air. The inner tube should be 2.25"x17", same as the tyre. Oh and it's not a monster, it's 50cc and 1.5hp. You can hold back a standard Puch Maxi on full throttle with 1 foot against the tyre.
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Last Edit: Nov 9, 2010 15:52:43 GMT by Mark16v
1985 MK2 Golf
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Thanks a lot mate thats some hugely useful information! Ordered a new gasket set in preparation for takin the carb off, that switch you talk of by the throttle? I think the lever must have snapped off mine, it's a chrome box with a small black button on the top? And I guessthere should be a lever on the side? How does it work? I take it there is no battery and electrics work off a dynamo of some kind somewhere? So is the function of that switch just like security pr somethin? I might have to try and araldite something on it to make it into a lever if it's the one your talking about? Thanks again
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Yes it's a 6 volt system with the dynamo powering the lights. The switch is basically just a circuit breaker. Below the carb you should see 2/3 wires coming out of the engine connected to a screw terminal. Here you can disconnect everything from the 2 wires so you basically have the engine running on it's own not powering anything. That way you will be sure that the switch is not causing any problems. With the switch you control lights, horn (when fitted) and ignition cutoff. So the only problem with disconnecting the switch is you can't turn the engine off anymore. In your case the best way to turn it off is either switch off the fuel supply, push down the choke (when the engine is hot), pull off the aircleaner and put your hand in front of the carb intake or my favorite: pull the front brake and "pop the clutch" with the third lever. By the way, the third small lever works opposite to how i explained it. Start pedaling, and when you pull the lever the clutch engages and the engine starts to rotate.
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1985 MK2 Golf
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Oh i just remembered how the switch works. The lever is for: pos.0 no lights pos.1 dipped beam pos.2 high beam The button on top is for horn (when fitted) and the button on the side is for ignition cut-off. So you should be able to get spark without disconnecting anything. As said, a very easy moped. The carb is probably the easiest thing you've ever seen. Same with the engine internals.
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1985 MK2 Golf
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Puch maxi eh? I will just leave these here for you I just started on a 78 Vesp Ciao myself. Bought it in boxes and can't wait for the first ride.
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Wow how cool are they?? Love those wheels and the handlebars are class Must. resist. temptation. to. modify!! So flipped her upside down and took the wheel rear off to attempt to repair my inner tube Nice.... However after getting it back on the wheel after leaving it to dry and then pumping it up it leaked again - not from this patch but I think it must have lots of pin holes that only leak at high pressure, its been sat on its in a garden flat for years so I took the plunge and ordered a new inner tube instead Whilst I had it upside down with the wheel off I took it as an opportunity to clean bits I couldn't get to before; Just got to wait for my bits and bobs from ebay to arrive 1. Inner tube 2. Gasket set (so I can whip carb off to clean) 3. New headlight/horn switch (my lever has snapped off) 4. Spark plug One thing that has worried me slightly is that I spotted that the cylinder head was a bit loose, on closer inspection it only had 3 of its 4 nuts on and they were a bit loose also the exhuast was loose as it only had 1 nut holding it on, I bolted the head down and replaced the missing nut as well as secured the exhuast so all good but it does have me wondering why the heads been off, unless they have just vibrated themselves loose over time and the previous owner didnt check much? Maybe it lost compression due to the lack of nuts on the head and he abandoned it? Who knows... I also fixed the non working speedo as the cable drive had come out on the wheel end and had the securing nut cross threaded back on without the drive locating - nice ;D So, fixed that too Gave it another wax with some Bilt Hamber carnauba wax (sad aren't I) before I finally went to bad at 1:20am ;D
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You can check compression quite easily. Make sure the head is secured with a spark plug inserted and try to rotate the flywheel by hand. You should feel when it's compressing and it should be quite hard to push through the compression. I remember this from when i had a 70cc cylinder on it so it could be a bit easier on a 50cc LOL. You've got a gasket set anyway so not that hard to replace the gaskets if you don't have compression. Cylinder foot gasket can be a bit of pain because of the piston rings but it's a million times easier then on a 4 stroke engine.
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1985 MK2 Golf
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Nov 10, 2010 11:29:45 GMT
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If I spin the pedals and then hold in the third lever it becomes much harder to spin them, good sign I guess? I'll try and see wether I have compression after work, is the flywheel on these basically the unit that goes around where the points etc are with a few slots you can see through And thats why I'm missing a cover on there as it's supposed to spin?
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Nov 10, 2010 11:56:15 GMT
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Yes that's the flywheel. And yes there's supposed to be a cover on there.
When you spin the pedals and pull the third lever you should also be hearing the piston going up and down and see the flywheel spinning.
Oh and please remember that these engines use gasoline mixed with oil in a 1:50 ratio. You could run it on normal gasoline for a short while but then the engine internals won't be oiled!
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Last Edit: Nov 10, 2010 12:19:04 GMT by Mark16v
1985 MK2 Golf
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Nov 10, 2010 12:26:58 GMT
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been looking at some videos of Puch Maxis.
heres one that hes done a bit of work on. Like welding up the cases to use a liquid cooled cylinder and a reed valve. Not sure of that exhaust angle tho
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Nov 10, 2010 13:04:14 GMT
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Love both those ones you own. they're epic.
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Nov 10, 2010 13:09:29 GMT
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Cool vid I'm not certain but I'm fairly sure the flywheel doesn't move and I can't hear the piston moving (I'll check again later) could I have put the decompression whatsit on wrong (under the plug)? What do you think I should check if the fly isn't moving when I press the lever in and pedal? Thanks again for your help mate
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