Kuryakyn Cylinder Base Timing Hole Cover For Harley-Davidson Twin Cam (1999–2006)
Smooth Chrome Accent & Clean Engine Base Transition for Early Twin Cam V-Twins
Clean up the left side of your Harley-Davidson engine and cover rough factory crankcase castings with the Kuryakyn Cylinder Base Timing Hole Cover. Specially contoured for 1999 through 2006 Harley-Davidson Twin Cam 88 engine cases, this precision-molded chrome cover bridges the gap between the base of the cylinders and the crankcase timing hole plug.
Crafted with Kuryakyn’s signature show-quality chrome finish, this sleek dress-up piece transforms an open, utilitarian area of the engine crankcase into a smooth, polished chrome surface. It masks rough aluminum casting seams and exposed bolt heads, providing a continuous, high-luster custom look that pairs perfectly with outer primary covers and cylinder base accents.
Technical Specifications & Product Details
| Feature / Metric | Product Specification | Rider Benefit |
|---|---|---|
| Brand / Manufacturer | Kuryakyn | Industry benchmark in custom chrome engine accents and V-Twin accessories |
| Product Style | Cylinder Base & Crankcase Timing Hole Cover | Conceals raw crankcase castings, timing plug areas, and base hardware |
| Material Construction | Die-Cast Aluminum / High-Impact Composite | Durable construction designed to withstand high engine oil temperatures and vibration |
| Finish Type | Show-Quality Mirror Chrome Plating | Seamlessly blends with OEM Harley chrome engine covers and inner primary cases |
| Installation Method | Direct Bolt-On / Adhesive Mount | Simple, non-destructive installation using standard hand tools |
Design Highlights & Custom Engine Aesthetics
### Concealing Factory Engine Roughness
Early Twin Cam 88 engine cases feature exposed crankcase timing plugs and unfinished aluminum casting lines right at the cylinder base junction. The Kuryakyn Cylinder Base Cover acts as an architectural trim piece, sitting flush against the cylinder fins and crankcase to form a flowing, mirror-chrome bridge across the lower engine block.
### Built for Thermal Stability & Vibration Resistance
Engineered to handle the intense radiant heat generated by air-cooled V-Twin cylinders, this cover will not warp, peel, or tarnish. Its snug, contoured design prevents vibration buzz, keeping your engine bay silent and sparkling through miles of long-distance touring.
Vehicle & Engine Compatibility Guide
Kuryakyn Cylinder Base Timing Hole Covers are engineered specifically for 1999–2006 Harley-Davidson models powered by Twin Cam 88 engines (Carbureted & EFI):
### Compatible Harley-Davidson Models (1999–2006)
- Harley-Davidson Touring: Electra Glide, Road Glide, Street Glide, Road King (1999–2006)
- Harley-Davidson Softail: Heritage Classic, Fat Boy, Night Train, Deluxe, Standard (2000–2006)
- Harley-Davidson Dyna: Super Glide, Low Rider, Street Bob, Wide Glide (1999–2005)
Fitment Note: Fits 1999–2006 Twin Cam 88 engines. Does not fit 2007-up 96 ci / 103 ci / 110 ci Twin Cam models or Milwaukee-Eight (M8) engines due to different crankcase castings and sensor positions.
Step-by-Step DIY Installation Overview
Installing the Kuryakyn Cylinder Base Timing Hole Cover is a fast 20-minute dress-up project requiring basic hand tools.
### Required Tools
- Standard Hex / Allen Wrench Set
- Isopropyl Alcohol & Clean Cloth (for cleaning engine case)
- Blue Threadlocker (Loctite 243)
### Step 1: Surface Cleaning & Preparation
Ensure the engine is completely cool. Clean the left-side crankcase timing hole area and lower cylinder base using isopropyl alcohol or degreaser to remove road grime and oil residue.
### Step 2: Alignment & Dry Fitting
Test-fit the Kuryakyn cover against the cylinder base and timing hole to verify proper alignment around surrounding bolts and pushrod tube covers.
### Step 3: Fastening & Final Cleanup
Secure the cover using supplied mounting hardware or high-bond adhesive backing according to included instructions. Torque fasteners gently with blue threadlocker applied, wipe down chrome with a soft microfiber cloth, and enjoy the upgraded look.
Frequently Asked Questions
### Will this cover interfere with servicing or checking ignition timing?
No. The cover is designed to be easily unbolted if access to the timing plug hole or primary case area is required for engine service or mechanical inspection.
### Does this fit 2006 Dyna models?
Yes. 2006 Dyna models feature the Twin Cam 88 engine and compatible crankcase geometry for this cylinder base cover installation.
### Order Your Kuryakyn Cylinder Base Timing Hole Cover Today
Give your Twin Cam engine a clean, show-ready custom appearance with brilliant chrome trim. Order your **Kuryakyn Cylinder Base Timing Hole Cover** today with fast shipping!
