KB PERFORMANCE
Piston Kit - 4.250" Standard - 11.7:1 CR - 128" Big Bore - 114"/117" M8
Part # 0910-6405
$446.95
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Confirmed fit for 78 motorcycle configurations across Harley-Davidson, model years 2017–2024.
| Years | Make & Model |
|---|---|
| 2018-2024 | Harley-Davidson FLTRXSE CVO Road Glide |
| 2017-2023 | Harley-Davidson FLHXS Street Glide Special |
| 2017-2023 | Harley-Davidson FLTRXS Road Glide Special |
| 2017-2021 | Harley-Davidson FLHTKSE CVO Limited |
| 2017-2024 | Harley-Davidson FLHXSE CVO Street Glide |
| 2017-2024 | Harley-Davidson FLHRXS Road King Special |
| 2017-2024 | Harley-Davidson FLTRX Road Glide |
| 2017-2019 | Harley-Davidson FLHTCU Electra Glide Ultra Classic |
| 2018-2024 | Harley-Davidson FLHCS Heritage Classic 114 |
| 2018-2023 | Harley-Davidson FXFBS Fat Bob 114 |
| 2018-2024 | Harley-Davidson FLFBS Fat Boy 114 |
| 2018-2020 | Harley-Davidson FXBRS Breakout 114 |
| 2019-2020 | Harley-Davidson FXDRS FXDR 114 |
- Valve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valves
- Type 3 hard-anodized crown offers corrosion resistance for alcohol-added fuels
- Type 3 hard-anodized top ring groove eliminates micro-welding of ring to the groove and gives a hard-flat surface for ring to rotate on
- OE-style round wire locks are easily installed
- Heavy-duty wrist pins with true 0.9270” diameter to fit rods correctly
- Line2Line AST skirt coating starts out with a near-zero wall clearance and through the break-in period hones the cylinders to produce the correct oil wedge, keeping the piston square to the cylinder for best ring seal and quiet operation
- Kit includes pistons, rings, pins and locks
- Requires 4.250" bore cylinder sold separately.
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Overview
The KB PERFORMANCE 0910-6405: Piston Kit - 4.250" Standard - 11.7:1 CR - 128" Big Bore - 114"/117" M8. Confirmed fit for 78 motorcycle configurations across Harley-Davidson, model years 2017–2024. Ships from Greasemoto — a veteran-owned motorcycle parts shop in Fort Worth, TX — with free U.S. shipping on orders over $100.
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Fits these motorcycles
- Harley-Davidson FLTRXSE CVO Road Glide
- Harley-Davidson FLHXS Street Glide Special
- Harley-Davidson FLTRXS Road Glide Special
- Harley-Davidson FLHTKSE CVO Limited
- Harley-Davidson FLHXSE CVO Street Glide
- Harley-Davidson FLHRXS Road King Special
- Harley-Davidson FLTRX Road Glide
- Harley-Davidson FLHTCU Electra Glide Ultra Classic
- Harley-Davidson FLHCS Heritage Classic 114
- Harley-Davidson FXFBS Fat Bob 114
- Harley-Davidson FLFBS Fat Boy 114
- Harley-Davidson FXBRS Breakout 114
- Harley-Davidson FXDRS FXDR 114