Description
Product Overview
The TDZ MOTO 11105 O‑Ring is a premium replacement seal designed specifically for Harley‑Davidson motorcycles. Constructed from high‑quality silicone gel, each ring measures 14 mm in outer diameter with a 10 mm inner diameter, providing a precise fit for the engine crankcase plug, transmission plug, and primary drain plug. The distinctive orange color is molded throughout the material, ensuring consistent performance and easy visual identification during installation. Packaged in a convenient 50‑piece set, these O‑rings are lightweight at 1.6 oz per piece and meet OEM specifications for durability and chemical resistance.
Usage
These O‑rings are ideal for routine maintenance and oil changes on all Harley‑Davidson models that specify the #11105 seal. Whether you are a professional mechanic or a DIY enthusiast, the rings install easily into the three standard drain plugs, creating a reliable barrier against oil leaks. Regular replacement during each oil change helps maintain proper oil pressure, reduces the risk of engine contamination, and extends the life of your drivetrain components.

Why Choose Us
TDZ MOTO is renowned for delivering OEM‑grade parts that match the original specifications of Harley‑Davidson motorcycles. Our O‑rings are molded from a single batch of silicone gel, eliminating surface coatings that can wear off over time. The vibrant orange hue not only matches the factory color code but also allows quick visual confirmation of correct installation. Each pack undergoes strict quality control to ensure uniform dimensions and consistent hardness, providing peace of mind for every rider.
Key Features
- Durable silicone gel construction resists heat, oil, and chemicals.
- Exact 14 mm outer and 10 mm inner diameters for a perfect fit.
- Bright orange color molded throughout for easy identification.
- Comes in a 50‑piece pack, ideal for multiple bikes or service shops.
- Meets OEM standards for Harley‑Davidson #11105 drain plug seals.
FAQ
What motorcycles are compatible with the 11105 O‑ring?
The 11105 O‑ring fits all Harley‑Davidson models that use the standard #11105 drain plug, including the crankcase, transmission, and primary drain plugs.
Can I reuse the O‑ring after removal?
While the silicone material is resilient, we recommend replacing the O‑ring at each oil change to ensure optimal sealing performance and prevent potential leaks.
Is the orange color just a surface coating?
No. The orange pigment is fully integrated into the silicone gel during molding, providing consistent color throughout the entire ring.
How do I install the O‑ring correctly?
Clean the plug seat, lightly lubricate the O‑ring with compatible oil, and press it evenly into the groove. Ensure the ring sits flush without twists.
What is the warranty on these O‑rings?
TDZ MOTO offers a one‑year limited warranty against material defects, reflecting our confidence in the product’s quality and durability.




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