TRX 400EX 400X 87mm Big Bore Cylinder +2mm Top End Rebuild Kit Complete Assembly
1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13111-KCY-670, 12251-HN1-003, 12209-KL4-005, C7825, 808894, 822278, 4040, 4606M08700, C7826, H0402027S, 4606M08800, 4667M08900, 808829, M2033, 8604DA
🔥 TRX400EX / 400X 87MM +2MM BIG BORE REBUILD KIT
Complete Top End Assembly – Fits All Honda 400EX, 400X, XR400 Models
If you're rebuilding your Honda 400 and want more power, more durability, and the peace of mind of a full warranty, this is the most complete, high-quality kit on the market — period.
We've sold thousands of these TRX400EX rebuild kits across all sizes — 85mm, 86mm, 87mm, 88mm, 89mm — and we proudly stand behind every one. Your kit includes everything needed for a high-performance, no-compromise top end build with a 1-year warranty and lifetime tech support.
Kit Includes:
- BPRATV 87mm Nikasil Big Bore Cylinder (1 Year Warranty)
- Wiseco, JE, CP Carrillo, or Wossner Forged Piston*
- High-temp piston rings
- Wrist pin and circlips
- Talon Titanium Head Stud Kit (Lifetime Warranty)*
- Cometic Big Bore MLS Top End Gasket Kit
- Heavy Duty Timing Chain
- Full 1-Year Warranty on Entire Kit*
Fits the Following Models:
- TRX 400EX (All Years)
- TRX 400X (All Years)
- XR400 (All Years)
⭐️ Why Buy from BPRATV?
BPRATV – The Best Parts. The Best Performance. The Best Price.
BRAPPPPPPPPPP!
No one supports 400EX owners better than we do. Trusted by builders, riders, racers — and backed by real warranty & tech help.
⚙️ Build it Right the First Time
Better performance, stronger parts, no cut corners. This kit delivers everything.
❓ Frequently Asked Questions
Q: Will this work on my 2003 TRX400EX?
A: Yes — this kit fits all years and models of TRX 400EX, TRX 400X, and XR400.
Q: Do I need to modify anything?
A: No — the kit is drop-in ready with OEM-fit components. Tuning recommended.
Q: Which piston brand comes with the kit?
A: We include a top-tier forged piston from Wiseco, JE, Wossner, or CP — depending on current availability.
© BPRATV LLC
Original: $608,000.00
-70%$608,000.00
$182,400.00
Description
1043-2, M2002, M2003, M2001,4606M08700,12100-KCY-670, 4606M08500, C7826, 71016-4, 12191-KCY-673, 30-33750, 13011-KCY-670, 90601-KA5-000, 13103-KCY-670, 13111-KCY-670, 12251-HN1-003, 12209-KL4-005, C7825, 808894, 822278, 4040, 4606M08700, C7826, H0402027S, 4606M08800, 4667M08900, 808829, M2033, 8604DA
🔥 TRX400EX / 400X 87MM +2MM BIG BORE REBUILD KIT
Complete Top End Assembly – Fits All Honda 400EX, 400X, XR400 Models
If you're rebuilding your Honda 400 and want more power, more durability, and the peace of mind of a full warranty, this is the most complete, high-quality kit on the market — period.
We've sold thousands of these TRX400EX rebuild kits across all sizes — 85mm, 86mm, 87mm, 88mm, 89mm — and we proudly stand behind every one. Your kit includes everything needed for a high-performance, no-compromise top end build with a 1-year warranty and lifetime tech support.
Kit Includes:
- BPRATV 87mm Nikasil Big Bore Cylinder (1 Year Warranty)
- Wiseco, JE, CP Carrillo, or Wossner Forged Piston*
- High-temp piston rings
- Wrist pin and circlips
- Talon Titanium Head Stud Kit (Lifetime Warranty)*
- Cometic Big Bore MLS Top End Gasket Kit
- Heavy Duty Timing Chain
- Full 1-Year Warranty on Entire Kit*
Fits the Following Models:
- TRX 400EX (All Years)
- TRX 400X (All Years)
- XR400 (All Years)
⭐️ Why Buy from BPRATV?
BPRATV – The Best Parts. The Best Performance. The Best Price.
BRAPPPPPPPPPP!
No one supports 400EX owners better than we do. Trusted by builders, riders, racers — and backed by real warranty & tech help.
⚙️ Build it Right the First Time
Better performance, stronger parts, no cut corners. This kit delivers everything.
❓ Frequently Asked Questions
Q: Will this work on my 2003 TRX400EX?
A: Yes — this kit fits all years and models of TRX 400EX, TRX 400X, and XR400.
Q: Do I need to modify anything?
A: No — the kit is drop-in ready with OEM-fit components. Tuning recommended.
Q: Which piston brand comes with the kit?
A: We include a top-tier forged piston from Wiseco, JE, Wossner, or CP — depending on current availability.
© BPRATV LLC
