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SKU:
NLT1R00290
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Honda FourTrax TRX350 4x4 Top-End Gasket Kit 1986–1989
$41.99
In Stock
$41.99
Sale price
$41.99
Regular price
Top-end gasket and seal set for compatible 1986–1989 Honda FourTrax 350 TRX350 4x4 engines, cross-referencing kit TL4185Q.
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I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
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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
- 1986 Honda FourTrax 350 4x4 TRX350
- 1987 Honda FourTrax 350 4x4 TRX350
- 1988 Honda FourTrax 350 4x4 TRX350
- 1989 Honda FourTrax 350 4x4 TRX350
Product Overview
Oil seepage, low compression, smoke, or a head-gasket leak can lead to top-end teardown, but fresh gaskets cannot correct a warped head, scored cylinder, worn piston, cracked casting, or crankcase-pressure problem.
Use this set when servicing the cylinder, head, valves, or piston. Compare every head, base, cover, exhaust, valve-seal, and O-ring piece shown against the planned repair.
Key Features & Performance
- Provides fresh upper-engine seals for a TRX350 top-end rebuild
- Engine sealing package organized for the stated rebuild scope
- Supports planned teardown after the source of leakage or compression loss is identified
- Cross-references TL4185Q
Replaces Part Numbers
- TL4185Q
Common Uses
- Resealing the cylinder and head after compression or leak-down diagnosis
- Replacing disturbed gaskets during engine service
- Resealing verified oil, coolant, air, or combustion leaks
Technical Specifications
- Part Type: Top-End Gasket and Seal Kit
- Engine Family: Honda TRX350
- Condition: New aftermarket
Installation & Fitment
- Check head and cylinder flatness and identify why the original gasket failed
- Clean mating surfaces without gouging and check flatness and thread condition
- Follow the exact gasket orientation, torque sequence, timing, and post-repair checks
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Model, production date, serial number, electrical or fuel-system version, dimensions, installed options, and previous repairs can affect fitment. Compare the original part and application information before purchase.
Frequently Asked Questions
Q: Will this fix low compression by itself? A: Only if sealing gaskets are the cause. Valve leakage, piston wear, cylinder damage, and cam timing must be checked.
Q: Does it include every seal in the engine? A: No. Confirm the pictured contents against every seal required for the exact top-end job.
Q: How do I confirm fitment before ordering? A: Match the original reference number where available, then compare the removed part, dimensions, connections, mounting details, model, serial or production information, and package photos.
Q: Is this an original-equipment part? A: No. This is a new aftermarket part. Brand names and reference numbers are used only to identify compatible applications.
Part Summary
keywords: Honda TRX350 top end gasket kit, FourTrax 350 head gasket, TL4185Q gasket set, 1986 1989 Honda engine seals, TRX350 compression repair
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.