Boyesen Ignition Cover - SC-33AM
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Product Information
Full details
The Boyesen Ignition Cover SC-33AM is an essential aftermarket upgrade for Yamaha YZ125 owners (2005-2025) who demand superior durability and a professional factory aesthetic. Engineered to outperform stock OEM components, this cover offers enhanced structural integrity and lightweight construction to protect the engine during demanding motocross and enduro sessions, though it requires basic mechanical knowledge for proper installation.
All features
| Model Part Number | SC-33AM |
|---|---|
| Brand | Boyesen |
Extended Product Information
FAQs
Is this cover compatible with all YZ125 years?
The SC-33AM is compatible with Yamaha YZ125 models from 2005 through 2025.
Do I need a new gasket when installing this cover?
While you can often reuse the existing gasket if it is in perfect condition, it is highly recommended to use a new OEM gasket to ensure a perfect, leak-free seal.
Does this provide a performance increase?
This is primarily a durability and aesthetic upgrade, though the reduced weight compared to some older stock covers is a secondary benefit.
How do I clean the powder-coated finish?
Use mild detergent and water. Avoid using harsh chemicals or high-pressure power washers directly at close range, as this can damage the finish over time.
Is this cover heavier than the stock one?
No, the Boyesen ignition cover is engineered to be lighter than the stock OEM components.
Troubleshooting
Oil leaking from the cover edge
Ensure the gasket is seated correctly and the mounting bolts were tightened in a cross-pattern to proper torque specs.
Cover does not sit flush against the engine
Check for debris or old gasket residue on the engine mating surface and remove it before attempting to reseat the cover.
Pros and Cons
Pros
- Significantly more durable than the stock OEM cover
- Lightweight design improves overall bike feel
- Professional factory aesthetic enhances motorcycle appearance
- Designed to withstand the rigors of competitive motocross and enduro
Cons
- Requires installation of the existing internal gasket or a new one
- May require basic hand tools and mechanical experience to install correctly
- Exclusively designed for Yamaha YZ125 (2005-2025) models only
Setup, Compatibility & Care
Compatibility is specific to Yamaha YZ125 motorcycles manufactured between 2005 and 2025. During setup, ensure the bike is on a stand and the engine is cool. Clean the mating surface on the engine cases thoroughly before installation to prevent oil leaks. When installing, tighten bolts in a cross-pattern to ensure an even seal across the gasket surface. For care, simply clean the powder-coated exterior with a mild soap and water solution after each ride to maintain the finish and ensure you inspect the perimeter bolts occasionally to confirm they remain secure.