KPMI Rocker Arm Bushing - EVO Big Twin & Sportster
About KPMI
Kibblewhite Precision Machining supplies valves, valve springs, guides and complete top-end kits used by professional V-twin engine builders. Its black diamond valves and spring kits are a standard specification on high-lift cam builds.
Restore precise valvetrain operation in your Harley-Davidson EVO Big Twin or Sportster with a KPMI rocker arm bushing. Machined from US mill-certified SAE 660 bearing bronze, this bushing is engineered for superior anti-friction performance and high load capacity. It's a direct OEM-equivalent replacement designed to combat wear in your rocker arm assembly.
Why riders pick this
- SAE 660 bearing bronze construction
- High load capacity and anti-friction
- Precision dimensional tolerances
- Tapered ends for easy installation
- Excellent surface finish
The valvetrain in your Harley-Davidson is under constant stress, and worn rocker arm bushings can lead to excessive play, noise, and premature component failure. KPMI rocker arm bushings provide a durable, low-friction surface that ensures smooth rocker arm movement, even under the high RPMs and demanding conditions of a performance V-twin. This upgrade helps maintain optimal valve timing and extends the life of your top-end components.
Engineered for Valvetrain Durability
- Constructed from US mill-certified SAE 660 bearing bronze
- Designed for superior anti-friction performance and high load capacity
- Tight dimensional tolerances ensure a precision fit
- Tapered lead on each end for easier installation
- Excellent surface finish for reduced friction and wear
Critical for Top-End Reliability
Whether you're performing a routine engine service or addressing valvetrain noise, replacing worn rocker arm bushings is a smart investment. The KPMI bushing offers enhanced durability and performance over stock, making it an ideal choice for riders who demand the best from their EVO-era Harley-Davidson. This bushing fits EVO Big Twin models from 1984-1999 and Sportster (XL) models from 1984-1999, ensuring your top end operates smoothly and reliably for many miles to come.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2106
- Material: SAE 660 bearing bronze
- Length: 1.65 in
- Width: 3.6 in
- Height: 0.85 in
- Weight: 0.16 lbs
Common questions
Will this rocker arm bushing fit my Twin Cam Harley-Davidson?
No, this KPMI bushing is specifically designed for EVO-era engines only, fitting 1984-1999 Big Twin and 1984-1999 Sportster models. Twin Cam engines require a different part number.
What are the benefits of SAE 660 bearing bronze?
SAE 660 bearing bronze is a high-load bearing material known for its excellent resistance to deformation and friction, especially under high RPM conditions. It's engineered to provide exceptional durability for rocker arms.
Should I replace both rocker arm bushings at the same time?
Yes, it is generally recommended to replace both the left and right rocker arm bushings simultaneously during a top-end service to ensure balanced wear and optimal valvetrain performance.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | KPMI |
| TYPE | Engine |
| SKU | 191-57088 |
| WEIGHT | 0.16 lb |
