This page is intended to be a more user-friendly guide to finding Puch-related info in the wiki. It is neither a comprehensive list of Puch articles, nor a comprehensive repair/performance guide for Puchs. It covers many of the most common problems and commonly asked questions. If you run into problems outside the scope of issues covered in this article, ask on the forums.
I want to:
Make my Puch run
The first step in making a moped run is to figure out why it won't run. Fred's Guide is hands down, absolutely the best place to start answering that question.
- I have a spark problem
- I have a fuel problem
- I have a compression problem
- I need to rebuild my engine
I have a spark problem
In approximate order of easiest/cheapest/most commonly broken to hardest/most expensive/least commonly broken, here are some ways to try and fix or troubleshoot spark problems on a Puch.
- Replace the spark plug
- Clean the points → Cleaning the points
- Check the wiring and/or hardwire the moped → Puch wiring
- Check the ignition timing → Ignition timing for points, Ignition Timing Chart for Puch (hint: make marks and check where it is before taking anything apart. It might be fine where it is.)
- Replace the spark plug boot and wire
- Replace the condensor → Install an external condensor on a Puch
- Replace the points
- Replace the external ignition coil
Feel free to ask on the forums if you run through this list without success, or if you'd like more advice before purchasing replacement parts.
I have a fuel problem
To troubleshoot a fuel flow problem, you have to make sure that fuel flows from the starting point (gas tank) and can get into the engine. The path of fuel flow goes as follows:
- Gas tank -- if your tank is rusty, the rust will clog up other fuel system components. Clean it if it's rusty → Removing rust from a gas tank
- Petcock -- old petcocks are often leaky or clogged. If your tank is rusty, either clean or replace the petcock.
- Fuel filter -- this is an insurance policy for your fuel system. They're cheap. Get one if you don't have one.
- Fuel line -- old fuel line is often brittle and can crack easily, or it may be clogged with something. Again, this is cheap. Replace it.
- Banjo -- this is where the fuel line attaches to the carb. Clean it as explained in the article.
- Bing -- Puchs use Bing carbs stock. The carb must be clean for the fuel to get in and out of the carb. The Bing article has links to videos about how to clean a Bing, how to fix a leaky Bing, how to adjust the needle and float on a Bing, and lots of other helpful information.
If you disassemble the carb or intake, after you get the moped running again, please check for air leaks before riding the moped for extended periods of time.
I have a compression problem
Compression problems aren't rare, persay, but they're a slightly different breed of problem than carb or spark problems. Possible causes of low compression include:
- Worn out piston rings
- Engine seizure
- Stripped spark plug or cylinder stud threads
- Damaged or missing head gasket or base gasket (Note: not all Puchs use a head gasket. If yours doesn't leak between the head and cylinder, you don't necessarily need one.)
All of these problems are examined in approximately the same fashion -- by removing the cylinder head and possibly the cylinder to inspect for damage. This process is described in the Install a kit article. Again, please ask on the forums if you have any questions or require additional assistance.
I need to rebuild my engine
- Rebuild a Puch E50 Engine
- Disassemble a Puch ZA50 Engine
- Changing Puch E50 transmission fluid
- Puch Maxi hardware list
- Puch bearings
Make my Puch go faster
You should also know which engine you have so you can buy parts that will work for your moped.
Knowing the horsepower rating and potential restrictions is also useful.
The following articles are aimed mostly at the E50 and ZA50 engines, although they may apply to other variations.
- Stock Puch Magnum cylinders have an angled exhaust port, but stock Puch Maxi cylinders have a flat exhaust port. Pipes designed for stock Maxi cylinders will not fit on stock Magnum cylinders without modification.
- Puchs with ZA50 engines have a wider pedal shaft. If you put a ZA50 onto a moped that came with an E50, your pedals may not clear the engine.
Learn more about my Puch
I need a manual
What model Puch do I have?
The models with wiki articles are listed here.