Piston Ring Kit OS 1.00 For Honda TRX 450 ATV 1998-2004 High-Performance Engine Restoration Fitment
Piston Ring Kit OS 1.00 For Honda TRX 450 ATV 1998-2004 High-Performance Engine Restoration Fitment is backordered and will ship as soon as it is back in stock.
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Piston Ring Kit OS 1.00 For Honda TRX 450 ATV 1998-2004 High-Perfor...
This oversize OS 1.00 piston ring kit is engineered for Honda TRX 450 ATVs from 1998 through 2004, delivering a precise seal in a bored cylinder to restore peak compression and curb oil consumption. Designed to address power loss, sluggish throttle response, and blue smoke, it helps your trail or farm machine reclaim its original performance without a full engine rebuild. The OS 1.00 sizing ensures a perfect fit after boring, restoring compression ratios for reliable operation on rugged terrain.
As a robust aftermarket replacement, this kit focuses on worn ring lands and blow-by common in high-load, off-road use. The chrome-plated top ring and high-carbon steel construction are designed to resist heat and wear, delivering durable sealing under demanding conditions. It’s a dependable choice for trail riders and agriculture work where long-term reliability and cost-effective maintenance matter.
Comprehensive Vehicle Fitment
| Manufacturer | Models / Series | Years / Details |
|---|---|---|
| Honda | TRX 450 Foreman FE (4x4) | 1998-2001; Standard models with possible engine rebuilds requiring OS 1.00 rings |
| Honda | TRX 450 Foreman ES / FM (Electric Shift) | 1998-2004; Includes variants with upgraded transmissions, compatibility for engines bored to OS 1.00 |
| Honda | TRX 450 Foreman S | 1998-2004; Utility models used in farming or trail riding, where ring wear from heavy loads is common |
Product Specifications
| Attribute | Details |
|---|---|
| OEM Reference Part Numbers | 13014-HN0-A01, 13014-HN0-A02 |
| Type | Piston Ring Kit, Oversize (OS 1.00) |
| Manufacturer | Aftermarket Replacement |
| Application | Engine rebuild for Honda TRX 450 ATVs; cylinders bored to OS 1.00 |
| Material | High-carbon steel with chrome-plated top ring |
| Dimensions | Oversize +1.00 mm; post-bore 94 mm; ring thickness ~1.5–2.0 mm per ring; set includes 3 rings per piston |
| Oversize Specification | OS 1.00 (1.00 mm over standard bore) |
| Bore Size Compatibility | Designed for 94 mm bore post-bore on TRX 450 engines |
| Ring Set Composition | Top compression ring; Second compression ring; Oil control ring |
OEM & Aftermarket Cross-Reference Information
| Part Number | Brand / Type | Cross-Reference Notes |
|---|---|---|
| 13014-HN0-A01 | Honda OEM | Original Honda part reference; OS 1.00 ring set for TRX450 Foreman |
| 13014-HN0-A02 | Honda OEM | Alternate OEM reference for slight revision; same OS 1.00 application |
What's Included
This OS 1.00 piston ring kit includes the following components in the box:
- Top compression ring
- Second compression ring
- Oil control ring
Note: Related items such as pistons, gaskets, and circlips are not included.
Why Choose This Aftermarket Replacement?
- Direct-Fit Compatibility: Designed to align with Honda TRX 450 Foreman engines bored to OS 1.00, ensuring straightforward installation without modification.
- OEM Cross-Reference: Uses Honda reference numbers 13014-HN0-A01 / A02 for accurate matching with factory specs.
- Premium Materials: High-carbon steel core with chrome-plated top ring for enhanced wear resistance and heat tolerance.
- Precision Oversize Solution: OS 1.00 precisely matches engines bored 1.00 mm over stock, restoring sealing surfaces and compression.
- Performance Restoration: Reclaims compression, reduces blow-by, and curbs oil consumption for reliable off-road performance.
- Cost-Effective Reliability: Aftermarket replacement that delivers durable performance without OEM-price premium.
Installation Notes:
- Prep and inspection: Inspect the cylinder bore for scoring and verify it is accurately bored to 94 mm before installing OS 1.00 rings.
- Cleanliness: Thoroughly clean all ring lands and oil grooves; remove carbon buildup to ensure proper sealing.
- Lubrication: Lightly coat rings and the piston skirt with clean engine oil before installation.
- Orientation: Install rings in the correct order (top compression, second compression, and oil control) with the gaps staggered per standard practice.
- End-gap checks: Check end gaps with the manufacturer's recommended feeler gauge; ensure gaps are within spec to avoid ring sticking or blow-by.
- Break-in awareness: After assembly, follow proper break-in practices to seat the rings and restore seal integrity under load.
Why Upgrade?
Worn piston rings allow blow-by, leading to reduced compression and higher oil consumption. Replacing with this OS 1.00 kit restores sealing efficiency and compression, delivering dependable power and oil control for your Honda TRX 450 in tough off-road conditions.
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