78 Puch

I need help. A neighbor boy acquired this bike and doesn't have the money to fix it. I volunteered to help. The bike looks like it is in fairly good condition but it need a bing carb or most of it any way and so far I can get any spark. I checked the tail lights and horn. Both seem OK. What else should I check. When can I find a wiring diagram for it also. I really would like the help this boy out. His family life isn't that great. Any help would be appreciated.

Bob

Re: 78 Puch

See Ya Moped Army /

Clean the points and make sure they are gapped at .015". Also, replace the spark plug and make sure the horn wires are connected.

Re: 78 Puch

Re: 78 Puch

a few Puch manuals are HERE break>

by far most likely, the spark issue is a matter of wiring or switch faults.. corrosion, loose screws and connections, etc. Older bikes that have sat around for years require thorough inspection. There should be wiring diagrams in one or more of those manuals.

Re: 78 Puch

Bob Phillips /

Thanks for the help so far. I will check it out tomorrow and let you know I how I make out.

Bob

Re: 78 Puch

Bob Phillips /

Thanks for all the help. I got the spark back. It was the resistor cap that was bad. I poured a little gas in the carb and it fired right up. Now I am looking for a complete carb or the following parts by number. I attached a photo of the carb. From what I can see I need parts:

3,4,5,6,7 and 8. Any one have a old carb for parts.

Bob

1117557747_bingpuch_small.jpg

Re: 78 Puch

I think you may need to get a new carb or find a used one because I've looked for those parts and no one seems to sell them individually. mopedjunkyard has them for like 109, but I'm sure you could find a cheaper used one somewhere.

Re: 78 Puch

Dave Peterson /

Check Ebay. There were some Bing carb rebuild kit in the $20 range. Skipjaz

Re: 78 Puch

Bob Phillips /

How is this carb adjusted. The only screw I can see adjust the idle speed. I don't see any mixture screw?

Bob

Re: 78 Puch

Bob Phillips /

I e mailed the Moped Junkyard and they have all the parts I need. Thanks for all the help with this bike. The owner will be thrilled when I finally get it running.

Bob

Re: 78 Puch

Jason Luther /

the mixture is adjusted ( the main adjustment, and the one you need to be right, at full throttle) by the main jet. it is the small (size of a screw head) brass fitting with a tiny hole in the center screwed into the carb body inside the carb bowl. you canbuy different sizes for different applications also when you receive the parts, youll get a needle. this is has four notches and is adjustable as well. although i (and i think many others) always just put it on the upper notch to make the mixture the leanest. this controls the mixture at less-than-full throttle. read the maxi service manual that someone gave the link to above. you can learn a lot real quick.

Re: 78 Puch

Bob Phillips /

Thanks for the information Jason. I emailed

http://www.bingcarburetor.com and I received a message back. The carry parts for the puch bing carb. They sent me a diagram of the carb and I circled the parts I need. I am waiting for the price list to come back so I can compare it to the Mopedjunkyard. Have you or any one else ordered parts from the bing co.

Bob

Re: 78 Puch

Jason Luther /

never from them. i think mjy's prices are pretty high. try ikesbikes.com, mopedwarehouse.com, or handybikes.com. youll have to email them from prices and availability, but they are way cheaper. bings are very popular carbs, you shouldnt have any problems getting those parts from one of those sites.

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