350cc Cylinder Head Piston Top End Rebuild Kit for Honda TRX350

Product DescriptionVerify the part fits before purchasing【Product Specifications】OEM Part Number:12100-HN5-670, 12200-HN5-M00, 98069-57916, 12251-HN5-671, 13010-HN5-671, 13111-HC0-000, 13112-HN5-670, 12191-HN5-670, 12200-HN5-670Cylinder Bore:78.5mm (Standard Size)Package Includes:1 × Cylinder Assembly, 1 × Piston (78.5mm), 1 × Piston Pin, 2 × Circlips, 1 × Piston Ring Set, 1 × Complete Gasket Kit, 1 × Air Filter, 1 × Oil Filter, 1 × Spark PlugCompatible With:2000-2006 Honda TRX350 Rancher (FE/FM/TE/TM/FA models)Engine Displacement:350ccProduct Features: Complete top-end rebuild solution with all necessary components 78.5mm standard bore cylinder for precise OEM specification fit Restores engine compression, reduces oil consumption, eliminates smoke 2-year warranty for purchase protection and peace of mind【Common Questions & Answers】Q: Does this kit fit my Honda Rancher?A: Yes, this kit is compatible with 2000-2006 Honda TRX350 Rancher models, including FE, FM, TE, TM, and FA variants. Please verify your model year before ordering.Q: Why do I need a top-end rebuild?A: If you notice blue exhaust smoke, loss of power, hard starting, excessive oil consumption, or low compression test results (below 120 psi), your engine likely requires a top-end rebuild.Q: Is the cylinder bore 78.5mm or a different size?A: This kit comes with a standard 78.5mm cylinder and piston. If your cylinder requires an oversized piston (78.75mm, 79.00mm, or 79.50mm), please do not purchase this kit.Q: What tools do I need for installation?A: You will need basic hand tools including a torque wrench, socket set, feeler gauges, ring compressor, and a service manual for torque specifications (cylinder head bolts typically 33-38 ft-lbs).Q: How long does installation take?A: For an experienced mechanic, installation takes approximately 3-5 hours. For first-time DIY, plan for 5-8 hours including proper cleaning and assembly.Q: Does this kit include the head gasket?A: Yes, the kit includes a complete gasket set with cylinder head gasket, base gasket, valve cover gasket, and all necessary seals for installation.Q: Will this fit my 2007 or newer Rancher?A: No, this kit is specifically designed for 2000-2006 TRX350 models only. It does NOT fit 2007 or newer Rancher 350/420 models.【Installation Instructions】1. Disconnect the battery and drain engine oil and coolant.2. Remove the seat, fuel tank, and body plastics to access the engine.3. Remove the cylinder head bolts (follow factory torque sequence) and lift off the cylinder head.4. Remove the cylinder and clean all mating surfaces thoroughly.5. Install new piston rings onto the piston following ring gap orientation guidelines.6. Apply clean engine oil to the cylinder wall, piston, and rings.7. Install the cylinder over the piston using a ring compressor tool.8. Install the new head gasket, cylinder head, and torque bolts to factory specifications.9. Replace the oil filter, air filter, and spark plug included in the kit.10. Refill with fresh engine oil and coolant, reconnect the battery, and perform initial startup.This complete cylinder head piston and gasket kit provides everything you need to restore your Honda TRX350 Rancher's engine performance. Whether you're dealing with blue smoke, compression loss, or excessive oil consumption, this comprehensive rebuild kit offers a cost-effective solution. Backed by a 2-year warranty, purchase with confidence knowing our support team is here to help.

Compatible with 2000-2006 Honda Rancher 350,Standard Bore,Replaces #12100-HN5-670,13010-HN5-671,13111-HC0-000

Exact Fit for Honda Rancher TRX350 Models – Designed specifically for Honda Rancher 350 TRX350 four-wheel ATVs from 2000-2006, including compatible TRX350FA/FM/TE/TM models. Please verify your ATV model, year, and OEM part number before purchase to ensure proper fitment.

Complete Top End Engine Rebuild Solution – This cylinder piston rebuild kit includes the essential components needed to refresh the upper engine assembly, including standard bore cylinder, piston, piston rings, gaskets, wrist pin, and circlips. Ideal for restoring worn engine parts without purchasing individual components separately.

[Direct OEM Replacement] Replaces OEM part numbers including 12100-HN5-670, 12200-HN5-M00, 12200-HN5-670, 12251-HN5-671, 13010-HN5-671, and others. Manufactured as a high-quality aftermarket solution to restore engine performance.

Restore Compression & Engine Performance – Designed to help repair common ATV engine issues such as low compression, excessive oil consumption, reduced power, hard starting, and worn cylinder or piston components. A practical replacement solution for aging Honda Rancher engines.

[1-Year Warranty for Peace of Mind] Backed by a 1-year warranty against defects. Our customer support team is available to assist with any installation questions or concerns. Please compare with original parts and photos before purchasing to ensure correct fitment.

Standard Bore Direct Replacement Design – Features a standard bore cylinder specification that matches the original engine dimensions for Honda Rancher TRX350 applications. No additional cylinder machining is typically required when replacing properly worn original components.

Built for ATV Riders, Farmers & Outdoor Enthusiasts – A reliable engine repair option for Honda Rancher owners who use their ATVs for farm work, ranch maintenance, hunting trips, trail riding, property transportation, and daily utility tasks.

Ideal for DIY Mechanics & Repair Shops – Perfect for ATV owners, backyard mechanics, and professional repair technicians performing engine restoration, overhaul, or maintenance on Honda TRX350 models. Helps simplify top-end rebuild projects with matched replacement components.