Honda Piston Kit TRX 400 FW STD 1995 To 2003 86mm
Honda Piston Kit TRX 400 FW STD 1995 To 2003 86mm is backordered and will ship as soon as it is back in stock.
Delivery and Shipping info
Delivery and Shipping info
- Standard delivery (2-4 working days) - £4.99 on eligible UK mainland orders under £50.
- Express delivery - £6.99 on eligible UK mainland orders placed before 2pm.
- Large equipment including international orders are subject to different delivery rates and timescales.
Returns
Returns
Start Your Return Online (Recommended)
- Log In: Sign into your account on our website.
- Select Order: Navigate to your order history and select the item you wish to return.
- Initiate Return: Follow the simple prompts to start your return.
Honda Piston Kit TRX 400 FW STD 1995 To 2003 86mm is backordered and will ship as soon as it is back in stock.
This piston kit is an 86mm standard-bore rebuild component designed specifically for the TRX400FW engine family from 1995 through 2003. It’s engineered to restore compression and power, delivering factory-level performance once again for daily riders and trail work. Featuring an OEM-referenced design (13101-HM7-000), this aftermarket replacement fits the stock cylinder and top-end components for reliable, consistent operation.
The kit targets common wear issues found in aging top-ends - loss of compression, diminished ring seal, and piston slap that erodes throttle response. By using a forged aluminum piston with a true 86mm bore, it delivers improved heat management and durability, helping maintain predictable power in rugged conditions and on the farm. The compression ratio for this bore size is typically around 8.2:1, aligning with the engine’s original performance characteristics.
What's Included
This piston kit comes with the following components:
- Piston
- Rings
- Wrist Pin
- Circlips
OEM & Aftermarket Cross-Reference Information
| Part Number | Brand / Type | Cross-Reference Notes |
|---|---|---|
| 13101-HM7-000 | OEM | Aftermarket Replacement equivalent; commonly cross-referenced to Wiseco 4669M08600 (86.00 mm std bore) for TRX400FW/Foreman 1995 - 2003 |
| 4669M08600 | Wiseco (Aftermarket) | 86.00 mm standard bore piston kit for TRX400FW/Foreman 1995 - 2003 |
| 4669M08700 | Wiseco (Aftermarket) | 87.00 mm oversize piston kit as a potential upgrade option |
Fitment
| Manufacturer | Models / Series | Years / Details |
|---|---|---|
| Honda | TRX400FW | 1995 - 2003 |
Specifications
| Attribute | Details |
|---|---|
| OEM Reference Part Numbers | 13101-HM7-000 |
| Type | Piston Kit (Standard bore) |
| Manufacturer | Aftermarket Replacement |
| Application | TRX400FW (1995 - 2003) |
| Bore Size | 86 mm |
| Piston Material | Forged Aluminum |
| Compression Ratio | Approximately 8.2:1 |
| Included Components | Piston, Rings, Wrist Pin, Circlips |
Installation Notes
- Pre-assembly inspection: Inspect the cylinder bore for scoring or out-of-round wear and confirm it remains a true 86mm standard bore before installation.
- Cleanliness is critical: Thoroughly clean all mating surfaces, oil passages, and the cylinder interior to remove old carbon and debris that could affect ring seal.
- Ring orientation and gaps: Install the piston rings with the correct orientation and verify end gaps per the ring spec before seating the piston.
- Wrist pin and circlips: Ensure the wrist pin diameter matches the piston and install circlips securely in both ends to prevent pin migration during operation.
- Lubrication and break-in: Apply assembly lube to the piston, rings, and bore, then follow a proper break-in procedure to seat rings and establish a good seal.
- Initial run checks: After installation, perform a careful check for unusual noises, oil consumption, or loss of compression; address any scoring or binding before returning the engine to service.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
