KB PERFORMANCE
Piston Kit - 4.250" +0.005" - 11.7:1 CR - 128" Big Bore - 114"/117" M8
Part # 0910-6406
$446.95
Out of Stock
- 60-day returns
- Free shipping over $100
- Secure checkout
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.
Customer Reviews
No reviews yet — be the first to review this part.
Overview
The KB PERFORMANCE 0910-6406: Piston Kit - 4.250" +0.005" - 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.
More from KB PERFORMANCE
KB PERFORMANCE
0913-0002
Wrist Pin Lock Ring - '98-'17 Twin Cam
$10.95
KB PERFORMANCE
DS-751287
Piston Kit - 3.875" +0.005" - 10.5:1 CR - 95" Twin Cam Big Bore
$307.95
KB PERFORMANCE
DS-751242
Piston Kit - 3.498" +0.005" - 8.6:1 CR - 80" Evolution Big Twin
$233.95
KB PERFORMANCE
0910-0939
Piston Kit - 3.875" Standard -10.5:1 CR - 96" to 103" Big Bore |103" Twin Cam
$322.95
KB PERFORMANCE
DS-751237
Piston Kit - 3.498" +0.010" - 9.0:1 CR - XL1200
$227.95
KB PERFORMANCE
DS-751243
Piston Kit - 3.498" +0.010" - 8.6:1 CR - 80" Evolution Big Twin
$233.95
KB PERFORMANCE
DS-751248
Piston Kit - 3.498" +0.005" - 10.5:1 CR - 80" Evolution Big Twin
$246.95
KB PERFORMANCE
DS-751264
Piston Kit - 3.498" +0.005" - 10.0:1 CR - XL883 to 1200 Conversion
$234.43
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