Sigg's Engine Overhaul Course | Puch Z50 / EX30 (Z50)

What to Expect in This Course:
You don’t want to just take your engine apart haphazardly and hope it runs again afterward, do you? In this course, you’ll perform a complete engine overhaul yourself—with our support, the right tools, and a check after every important step.

We’ll walk you through the process step by step using a sample engine. Then you’ll apply what you’ve learned directly to your own engine. That way, you’ll not only know what needs to be done, but also what’s important for a thorough engine overhaul.

Schedule over four course days:
Course Day 1:
Disassemble the engine, assess the condition of the individual components, and determine the necessary replacement parts. Together, we’ll figure out what your engine really needs. You’ll order the parts to be delivered directly to your home and bring them with you on the next course day.

Course Day 2:
Thoroughly clean the parts and engine casing and correctly space the shafts. Here, too, we’ll walk through each step together and check the important intermediate steps.

Course Days 3 & 4:
Reassemble the engine step by step and complete the overhaul.

This course focuses solely on engine rebuilds. You’ll handle the removal and installation of the engine, fine-tuning, and other work on the entire moped at home or here at our Open Garage.

The big advantage: You do the work yourself, but you’re not on your own. We’ll show you the individual steps, monitor your progress, and help you select the right parts. This helps minimize unnecessary trial-and-error and the use of unsuitable components.

We exclusively install contact-break ignition systems or VEC ignition systems. For individual components such as cylinders, carburetors, exhausts, or tuning parts, we’ll also give you tips and help you make the right choices. However, these components are not part of the actual engine overhaul.

Course Information:
Course Dates (4-day course): Wednesdays:
March 3, 2027
; March 10, 2027
; March 17, 2027
; March 24, 2027

Meeting time
: 1:15 p.m. Course start: 1:30 p.m.
Break: 3:00–3:15 p.m.
Course end (including cleanup): 5:30 p.m.

Number of participants: 3–6 people

Notes:
• The cost of materials for your engine overhaul is not included in the course price.
• As a rough estimate, you can expect additional material costs of approximately 650.- for a Z50 engine. This includes ball bearings, shaft seals, the crankshaft, the ignition system, and the necessary small parts.
• Any additional parts required or desired—such as a clutch, cylinder, or tuning components—will incur extra costs. What is actually needed often becomes clear only after the engine has been disassembled.
• Everyone works on their own engine.
• We’ll guide you step by step through the entire engine overhaul and regularly check the key steps.
• Together, we’ll determine which parts need to be ordered or sourced in addition to the standard overhaul parts.
• Your engine case must be in serviceable condition on the outside. Cracked case parts or similar major damage should be ruled out before the course begins. Unfortunately, what you’ll find inside won’t be clear until after disassembly.
• In exceptional cases, additional replacement parts may need to be arranged between course days. We do not keep replacement engine housings in stock.
• We provide the workstation and hand tools.
• Hearing and eye protection are also available.
• Open-toed shoes are not permitted in the workshop.
• A small selection of beverages is available for purchase.

Disclaimer:
Please review the downloadable disclaimer. It must be printed out, signed, and brought to the course.

For minors, the second page must also be signed by a parent or legal guardian.

If you do not have access to a printer, copies are available on site. This must be filled out and signed before the course begins. For minors, filling it out on site is only possible if a parent or legal guardian is present.