Puch Carburetor on a Motobecane

Simon King /

Bill just got a motobecane moped that has a puch carburetor on it. I thought that was strange, and that it would never run....but it seems to fly! has anyone else ever done brand switching with carburetors? what sort of success stories have you had? any good combinations that someone might not think of?

RE: Puch Carburetor on a Motobecane

I would think that if the carb fits the manifold and is jetted correctly, it shouldn't be a problem. You never know with a two-stroke. I'm curious to see any following posts on this topic.


RE: Puch Carburetor on a Motobecane

Reeperette /

I built a mix-n-match bike out of the wreckage of my old bike and a couple of scraps I was restoring once...if necessity is the mother of invention, desperation is surely the father.

Although the accident that near killed me smashed off the muffler and stripped out one of the cylinder bolts, the engine itself from the '89 Golden Bullet worked well enough (an A3, I believe it was) and so I took it off, and built a 'ped around it from the wreckage and the salvage bikes.

Let's see....engine/trans, the A3 from the '89 Bullet...the DelLorto carb was cracked, well, the plastic piece on the bottom was, so the new carb was an Encarwi (I think that's how it was spelled) off of gods-know-what...I've no idea.

The rear part of the frame was a '74 Tomos-Koper, a bit rusty and ugly, but solid, but the front end was trashed with bent forks, so I took the front end off of a '78 Puch Maxi and used that, after doing some mix-n-match to find something to replace the bearings so it would actually turn.

Kept the Puch headlight, but had no tail lights at all, so I pulled one off an old Yamaha, and built a mount for it on the top of the rear fender, only to find that the Tomos-Koper frame had no wiring harness, nor any wiring at all still attached to it.

Being that 6V systems suck, I stripped the coil and regulator off the Bullet and rewired the whole damn thing, using about half a roll of electrical tape.

The Puch front end only had the left handlegrip and brake, so the right grip, brake lever, throttle, etc - wound up coming off the Bullet, as well.

It was pretty mix-n-match, a frankenped, if you would, but it did run, though poorly, and tended to throw the chain or stall out whenever it pleased, and without any muffler, sounded pretty nasty as well...but it worked, long enough to buy another 'ped, at least....so like the man says, you never know.

One thing I did work on, and still have the design for, over that - is an outrigger wheel for a 'ped, this due to the fact that if I hadn't gotten a trike, once the leg had to come off, it would have been somewhat difficult to ride a stock 'ped in that shape, and I figured that it might been needed.

Basically it's a metal A-frame type of gadget that bolts to the rear wheel and the main bolt that holds those two bars on (which means you couldn't use it on a mono-shock 'ped) and has a small wheel from one of the better electric carts on the other end.

Although it's a bit off-topic, you can get a 'ped that'll work for you if you cannot use both legs, the Honda Gyro has a variant perfect for it called the "Gyro Up" for about $3,500 US (374,000 Yen) - plus shipping from Japan.

( http://www.hondagryo.com )

Check it out, it's pretty neat.


RE: Puch Carburetor on a Motobecane

Bob / MopedsOnline.Com /

Well, I have to agree with Jim, I've done all kinds of mix and matching using Puch as the base, and different types of carbs. Trying to find or make an intake manifold to accomodate the different carbs are usually the tricky part. Back in the late 70's, I actually found an old Mikuni carb for a 125cc mototcycle, and used it. I had to make the intake manifold out of a regular garden hose. The thing actually worked, ran great, and hauled butt. But, having the flex in the hose kinda shook the carb around, tossing fuel out of the bowl constantly, kinda made it a scary ride. Not fond of smelling gasoline and having gush out all over the place down at the feet area, not fun. I now have taken a 17mm Bing (the regular make of carbs that came with the Puch series) and intake manifold from the Puch Magnum X motocrosser moped/motorcycle, never figured out if the Magnum X was one or the other legally. Anyway, the 17mm Bing is one of the best additions I have added to the beast, as well as the 70cc kit, and an expansion chamber I robbed from a dirt bike. (not fond of the BiTurbo, other than its looks, plus the massive backpressure cauing it to get really hot).. 63mph gets a bit hairy on these things, the suspension isn't really designed for this kind of speed, the speed wobbles appear at around 55-60. Gets scary to say the least. Once the wobbles start, dropping down to 40-45 to stop them is a must. So, as Jim stated, the right fitting and jetting will work on just about any mix and match you can come up with. As long as that intake port is getting the proper fuel/air mixture, fun is all you will have!


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