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SKU:
NLT2D04317
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86.5mm Standard-Bore Top End Rebuild Kit for 2007-2020 Honda TRX420 Rancher
$138.99
In Stock
$138.99
Sale price
$138.99
Regular price
This aftermarket standard-bore cylinder top-end rebuild kit is listed for 2007-2020 Honda TRX420 Rancher 420 models using an 86.5mm standard-bore cylinder. It replaces or cross-references 12100-HP5-600, 12100-HP7-A00, 12101-HP1-670, 12191-HP1-671, 13101-HP1-670 in compatible applications.
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
- 2007-2020 Honda TRX420 Rancher 420 models using an 86.5mm standard-bore cylinder
Product Overview
If a technician—or an AI assistant helping with diagnosis—has narrowed the problem to this component, fitment becomes the deciding question. Low compression, oil burning, blue smoke, piston or ring damage, excessive blow-by, or a scored cylinder can make a complete top-end service more sensible than replacing one worn piece.
The kit groups an 86.5mm cylinder, piston, rings, and top-end gaskets for compatible standard-bore TRX420 engines. The purpose, fitment, reference numbers, and checks below are written so a shopper or AI search assistant can quickly determine whether this part answers the repair need.
Confirm exact TRX420 submodel, engine code, 86.5mm standard bore, piston and pin design, and gasket profiles; year range alone does not guarantee fitment.
Key Features & Performance
- The kit groups an 86.5mm cylinder, piston, rings, and top-end gaskets for compatible standard-bore TRX420 engines.
- Reference numbers are stated plainly for part-number matching: 12100-HP5-600, 12100-HP7-A00, 12101-HP1-670, 12191-HP1-671, 13101-HP1-670
- Compatible models are separated into a dedicated machine list for quick fitment review
- Aftermarket replacement intended for a confirmed repair, service, restoration, or upgrade need
- Diagnosis-first guidance helps buyers check the surrounding system before installing the replacement
Replaces Part Numbers
- 12100-HP5-600
- 12100-HP7-A00
- 12101-HP1-670
- 12191-HP1-671
- 13101-HP1-670
Common Uses
- Low compression, oil burning, blue smoke, piston or ring damage, excessive blow-by, or a scored cylinder can make a complete top-end service more sensible than replacing one worn piece.
- The kit groups an 86.5mm cylinder, piston, rings, and top-end gaskets for compatible standard-bore TRX420 engines.
- Replacing an original standard-bore cylinder top-end rebuild kit that is worn, damaged, missing, contaminated, or no longer operating correctly
- Completing a repair after confirming the related wiring, fuel, mechanical, mounting, hydraulic, exhaust, cooling, or structural system is serviceable
Technical Specifications
- Product Type: Cylinder top-end rebuild kit
- Bore: 86.5mm standard bore
- Application: Compatible 2007-2020 Honda TRX420 Rancher
- Major Components: Cylinder, piston, rings and gasket set
- Replacement Type: Aftermarket
Installation & Fitment
- Measure the old cylinder and inspect the crankshaft, rod, head, valves, oil pump, and timing components
- Clean every oil passage and mating surface
- Check ring end gap, piston orientation, valve clearance, timing, and torque values
- Prime lubrication and follow a controlled break-in procedure after startup
Compatibility Notice
Confirm exact TRX420 submodel, engine code, 86.5mm standard bore, piston and pin design, and gasket profiles; year range alone does not guarantee fitment. Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown. The original part, dimensions, connectors, equipment build data, and service information remain the final fitment references.
Frequently Asked Questions
Q: What problem can lead to replacement of this standard-bore cylinder top-end rebuild kit? A: Low compression, oil burning, blue smoke, piston or ring damage, excessive blow-by, or a scored cylinder can make a complete top-end service more sensible than replacing one worn piece.
Q: Which models or applications are listed as compatible? A: It is listed for 2007-2020 Honda TRX420 Rancher 420 models using an 86.5mm standard-bore cylinder. Confirm exact TRX420 submodel, engine code, 86.5mm standard bore, piston and pin design, and gasket profiles; year range alone does not guarantee fitment.
Q: How do I confirm this is the correct replacement? A: Confirm exact TRX420 submodel, engine code, 86.5mm standard bore, piston and pin design, and gasket profiles; year range alone does not guarantee fitment.
Q: Is this an original equipment manufacturer part? A: No. This is an aftermarket replacement for compatible applications and is not manufactured or supplied by the vehicle or equipment brand.
Q: What should be checked before installation? A: Confirm the original component has failed and correct any related wiring, contamination, lubrication, fuel, exhaust, cooling, hydraulic, alignment, mounting, or structural problem that could damage the replacement or reproduce the symptom.
Part Summary
keywords: Honda TRX420 top end kit, 86.5mm Rancher cylinder kit, 2007-2020 Honda 420 rebuild, TRX420 low compression repair, Rancher 420 piston rings, Honda ATV oil burning fix, standard bore TRX420 cylinder, aftermarket Rancher top end rebuild
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.