Does it fit your motorcycle?
Look it up by licence plate or VIN, or choose your model.
Confirmed compatible · Position:
This part doesn't fit your bike. See parts that fit
Fits most motorcycles
Not model-specific. Check dimensions and specifications in the description before ordering.
Chosen by size, not by model
The size is printed on the tyre sidewall, e.g. 120/70 ZR17, and in your registration document.
Checking fitment…
Fitment check unavailable
Drag Specialties Cast Piston Kit - 3.750" Bore - +.010" - 21930-99-010
Product info
- Item number
- 09110043
- Manufacturer number
- 21930-99-010
- Position
The Drag Specialties Twin Cam Piston Kit with a +0.010" oversize bore is engineered to restore your motorcycle's engine performance with OEM-quality precision. Crafted from durable cast aluminum alloy, this piston kit provides a reliable and cost-effective solution for rebuilding or repairing your Twin Cam motor.
Description
This premium Drag Specialties Piston Kit is specifically designed for Twin Cam motors, offering a robust 9.0:1 compression ratio that ensures consistent power delivery and engine efficiency. Each kit features a precise 3.750" bore size with a +0.010" oversize, making it an ideal choice for engines requiring a slight bore increase during a rebuild. Manufactured from high-grade cast aluminum alloy, these pistons meet or exceed original equipment standards for durability and performance. They are an excellent OEM replacement option, providing the quality and fitment you expect for a smooth restoration. The kit includes two pistons, along with the necessary wrist pins and clips, simplifying the installation process and ensuring a complete assembly right out of the box.
Features & Highlights
- OEM-Quality Construction: Engineered from robust cast aluminum alloy, these pistons offer exceptional durability and reliability, matching original equipment standards for a dependable engine rebuild.
- Optimized for Twin Cam Motors: Specifically designed for Twin Cam engines, ensuring perfect fitment and compatibility for seamless replacement or upgrade.
- Enhanced Compression Ratio: Delivers a strong 9.0:1 compression ratio, contributing to efficient combustion and responsive power delivery for your motorcycle.
- Complete Kit for Easy Installation: Each package includes two pistons, two wrist pins, and all necessary clips, providing a comprehensive solution for your engine overhaul.
- Versatile Ring Compatibility: Designed to accept both OEM and Hastings piston rings, offering flexibility and convenience when selecting your preferred ring set (rings sold separately).
Important to Know
- Piston rings are not included and must be purchased separately. This kit is designed to accept OEM or Hastings piston rings.
- Vendor part number
- 21930-99-010
- Product name
- Piston Kit
- Style
- Cast
- Bore size
- 3,750"
- Compression ratio
- 9.0:1
- Piston material
- Aluminum Alloy
- Width
- 121 mm
- Height
- 117 mm
- Length
- 217 mm
- Bore oversize
- +0.010"
- Type
- Replacement
- Units
- Kit
Free shipping to a GLS parcel shop or parcel box on orders over €200.
We ship your order as quickly as we can. Orders are usually packed within 24 hours on weekdays.
You have a 14-day right of return. Read more
4.8 out of 5 on TrustpilotRead our reviews →
Certified e-mærket web shop
