KPMI +.001 Bronze Intake Valve Guide - Harley Evolution & 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.
This KPMI bronze intake valve guide, sized at +0.001 oversize, is designed for Harley Evolution and Sportster engines that require a slightly larger guide due to wear. It's a direct replacement that helps restore proper valve-to-guide clearance, crucial for optimal engine performance and oil control. This guide is an excellent choice for cylinder head refreshes.
Why riders pick this
- Durable bronze construction
- +0.001 oversize for minor bore wear
- Designed for intake valve position
- Restores proper valve-to-guide clearance
- Ideal for Evolution and Sportster rebuilds
When your Harley Evolution or Sportster engine shows signs of valve guide wear, a precise replacement is essential. This KPMI intake valve guide, crafted from durable bronze and featuring a +0.001 oversize, is engineered to address minor wear in the cylinder head's original guide bore. It ensures the valve stem is properly supported, which is vital for maintaining consistent valve sealing and reducing oil consumption, helping your V-twin run smoother and more efficiently.
Precision Fit and Durability
- Constructed from high-strength bronze for enhanced wear resistance
- +0.001 oversize for worn cylinder head bores
- Designed exclusively for the intake valve position
- Restores proper valve-to-guide clearance
Optimizing Your Top End
Choosing an oversize valve guide like this +0.001 KPMI bronze unit is a strategic move when rebuilding an Evolution or Sportster engine with minor bore wear. While it drops into the stock bore, it's intended to be reamed to precisely match the valve stem, ensuring a perfect fit without requiring extensive machining of the cylinder head itself. Always confirm your engine's specific requirements before ordering to guarantee optimal results.
Specifications
- Brand: KPMI
- Manufacturer Part #: 20-2121
- Type: Intake valve guide
- Oversize: +0.001
- Length: 1 in
- Weight: 0.09 lbs
Common questions
What does +0.001 oversize mean for this valve guide?
This guide is 0.001 inches larger in diameter than a standard guide. It's intended for use when the original cylinder head bore has experienced slight wear, providing a tighter fit after machining.
Do I need to bore my cylinder head to install this guide?
No, this +0.001 oversize guide is designed to drop into the stock bore. However, it will require reaming to achieve the correct internal diameter for your valve stem, which is typically done by a machine shop.
Is this an intake or exhaust valve guide?
This specific part is an intake valve guide only. If you require an exhaust valve guide, you will need to order a separate part number.
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 | 191-57052 |
| WEIGHT | 0.09 lb |
