Standard Bore 350cc Cylinder Head Piston Top End Rebuild Kit Compatible with Honda Rancher 350 TRX350 2000-2006, Replaces #12100-HN5-670

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.

• [Complete Top End Rebuild Kit] This all-in-one kit includes cylinder head assembly, piston (with rings, pin, and circlips), full gasket set, air filter, oil filter, and spark plug – providing everything needed for a comprehensive top-end overhaul on your Honda Rancher TRX350.
• [Precision Fit for 2000-2006 Honda Rancher TRX350] Specifically engineered for Honda TRX350 models (FE, FM, TE, TM, FA) from 2000 to 2006. Matches OEM specifications for reliable compatibility. Please verify your model year before ordering.
• [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.
• [Quality Construction] Built with durable materials to withstand typical ATV operating conditions. The cylinder and piston assembly helps restore compression, reduce oil consumption, and promote smoother engine operation when properly installed.
• [2-Year Warranty for Peace of Mind] Backed by a 2-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.