946428 Replacement 45" Flathead piston kit. +.030"
incl. VAT
Chapter members save 15% · Sign in for member pricing
Estimated delivery: 3–15 working days
Authorised
Iron City Dealer
14-Day Returns
Easy & hassle-free
Secure Checkout
256-bit encryption
Free UK Delivery
On orders over £100
Specifications
- Brand
- MCS
- Part Number
- 946428
- OEM Reference
- 946428
- Pack Quantity
- Sold as a set
- Category
- Pistons And Rings Kits
- VAT Rate
- 20%
About This Product
For 1929 to 1973 45-inch Flathead engines that need a .030-inch oversize, this MCS piston kit provides a high-quality, cast aluminum solution. These pistons are designed to OEM specifications for a stock 750cc Side Valve rebuild, ensuring compatibility with original engine components. The kit is sold as a set and includes the pistons, wrist pins, retainers, and a full set of rings. Whether you are restoring a military WLA or maintaining a classic Servi-Car, these pistons offer the durability needed for vintage riding. Identified by OEM number 946428, this kit is a reliable choice for any mechanic looking to restore compression and smooth operation to a 45-inch Flathead.
Manufacturer part number: 946428.
Fitment
29-73 45" (750cc) Side Valves
Related Products
View all →
More from MCS
View all →
Who are we? Leeds Harley-Davidson - Iron City Motorcycles
This product is fulfilled by Iron City Motorcycles, Leeds' authorised Harley-Davidson® dealer, serving the UK with a full range of Genuine Motorclothes®, dealer merchandise, and official Harley-Davidson parts & accessories — available for UK and international delivery.
From OEM Parts to retro lifestyle wear to aftermarket stockits we have what you need to keep you riding all year round.
Use our official OEM parts finder to browse our full Genuine Harley-Davidson® Parts and our associated approved aftermarket catalogues.