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SKU:
NLT1R02688
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Yamaha Timberwolf 250 Cylinder Piston and Top-End Kit 4BD-11310-01
$127.99
In Stock
$127.99
Sale price
$127.99
Regular price
Standard-style cylinder, piston, rings, pin, clips, and top-end gasket package replacing Yamaha cylinder 4BD-11310-01 on compatible Timberwolf 250 engines.
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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
- 1992–2000 Yamaha Timberwolf 250 YFB250 2WD models with the matching cylinder
- 1992–2000 Yamaha Timberwolf 250 YFB250 4x4 models with the matching engine layout
Product Overview
A Timberwolf with low compression, smoke, piston noise, or a scored bore may be ready for top-end work, but the diagnosis should extend below the cylinder. A loose rod, dirty oil system, intake dust, overheating, valve leakage, timing wear, or poor fuel mixture can damage the new parts if left unresolved.
The kit renews the cylinder and reciprocating sealing parts at the top of the four-stroke engine. Match the 4BD cylinder reference, bore and pin dimensions, cam-chain passage, oil holes, stud pattern, gasket shape, and exact YFB250 engine before assembly.
Key Features & Performance
- Cylinder and piston service package for matching Timberwolf 250 engines
- Cross-references Yamaha cylinder 4BD-11310-01
- Includes rings, pin, clips, and related top-end gaskets as shown
- Restores compression after measured cylinder or piston wear
Replaces Part Numbers
- 4BD-11310-01
- 4BD-11310-01-00
Common Uses
- Replacing a scored or damaged cylinder
- Correcting compression loss from worn piston rings and bore
- Repairing a top end after oil-control or overheating damage
- Completing a measured upper-engine overhaul
Technical Specifications
- Product Type: Cylinder, Piston and Top-End Gasket Kit
- Vehicle: Yamaha Timberwolf 250 YFB250
- Bore Type: Standard-style replacement; verify actual dimensions
- Condition: New aftermarket
- Fitment Basis: Original cylinder number and physical measurement
Installation & Fitment
- Measure piston, bore, ring gaps, wrist pin, and connecting-rod small end
- Inspect valves, guides, cam chain, tensioner, oil passages, crankshaft, and cooling fins
- Confirm gasket oil holes and cam-chain passage before placing the cylinder
- Set cam timing and valve clearance by the manual, prime lubrication, and follow break-in
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: Can I diagnose a worn top end from smoke alone? A: No. Valve guides, seals, crankcase breathing, fuel mixture, and oil level can also cause smoke.
Q: Why verify the cylinder number when the ATV is a Timberwolf 250? A: Engines and top ends may have been swapped over decades of service; the removed part provides the safest match.
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: Yamaha 4BD-11310-01 cylinder, Timberwolf 250 top end kit, YFB250 piston rings, Timberwolf low compression repair, Yamaha 250 cylinder replacement, ATV engine rebuild kit
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.