How to Spot Good or Bad Quality in Fiberglass Parts

Are you looking to upgrade your bike with fiberglass parts? Whether it's a new fairing, saddlebags, or a custom fender, the quality of the fiberglass can make or break your build. At Insane Asylum Motorsports, we know that the right materials are crucial for both performance and aesthetics. Don't waste your time and money on cheap parts. Here's how to tell if you're getting good quality for your motorcycle customizations!

White Road King Nacelle Kit installed on bike

The Look and Feel

High-quality fiberglass should have a smooth, consistent finish. Run your hand over the surface — it should be free of bumps, pits, or uneven textures. Check for symmetry and proper alignment, as poor-quality molds can result in warped or misaligned parts.

Smoothie Side Covers on a row of motorcycles

Thickness and Rigidity

A good part will feel solid and strong. It should have a uniform thickness throughout, without thin or flimsy spots that could easily crack. The part should have some flex but be rigid enough to hold its shape under stress. Thin, flexible parts are a sign of cheap manufacturing.

Insane Asylum Motorsports 99 to 2013 Road Glide Quad 6.5 Inner Fairing Double Din RGDD installed on bike

Proper Fitment

The mark of a quality part is its fit. It should align with your bike's existing points without needing excessive force or modification. Poor-quality fiberglass often requires significant sanding, trimming, or drilling, which can be a huge hassle and lead to a less-than-perfect finish. 

Orange Audio Tour back rest plate installed on a bike

Gel Coat Finish

The gel coat is a protective layer applied during the molding process. A high-quality gel coat is uniform and ready for priming and paint, while a bad one may be uneven, have air bubbles, or crack easily. A strong gel coat provides the perfect canvas for a professional paint job.

Prioritize Top-Tier Motorcycle Customizations

When it comes to motorcycle parts, quality matters. Investing in well-made fiberglass parts from a reliable Harley custom shop ensures a better fit, a smoother finish, and a part that will last for years. Ready to find the perfect upgrade for your ride? Shop with Insane Asylum Motorsports today!

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