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SKU:
NLT1R02640
Ships for free in 2–4 business days.
Honda XR50 CRF50 Z50R 50cc Cylinder Head and Piston Rebuild Kit
$117.99
In Stock
$117.99
Sale price
$117.99
Regular price
50cc-style cylinder, head, piston, rings, pin, clips, gaskets, and fittings package for compatible Honda XR50R, CRF50F, and Z50R horizontal engines.
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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
- Honda XR50R models with the matching 50cc engine layout
- Honda CRF50F models with the matching bore, head, and stud pattern
- Honda Z50R models with the matching horizontal-engine configuration
Product Overview
Low compression, smoke, a scored cylinder, damaged valves, or a stripped head can lead to a complete top-end service. Before installing a new assembly, inspect the crank, rod, oil pump, cam chain, tensioner, intake, exhaust, and the cause of the old failure.
Honda used multiple 50cc horizontal-engine revisions and many bikes now contain swapped or big-bore engines. Measure bore and pin, compare cam and head ports, stud spacing, oil passages, intake angle, and package contents rather than ordering by decal alone.
Key Features & Performance
- Cylinder-head and piston package for matching Honda horizontal engines
- Includes upper-engine hardware and gaskets shown
- Useful for returning a modified or damaged engine to a 50cc-style top end
Common Uses
- Repairing low compression from cylinder, ring, or valve wear
- Replacing a cracked or stripped cylinder head
- Rebuilding a 50cc top end after measured damage
Technical Specifications
- Product Type: Cylinder Head and Piston Rebuild Kit
- Engine Type: Honda-style horizontal four-stroke
- Displacement Class: 50cc-style; verify bore
- Condition: New aftermarket
Installation & Fitment
- Measure the removed bore, pin, studs, ports, and cam components
- Inspect crank and oil system and clean every passage
- Set ring gap, cam timing, valve lash, torque, and break-in correctly
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 fit every Chinese 50cc pit bike? A: No. Similar horizontal engines can use different studs, ports, bores, cams, and electrical layouts.
Q: Can I install it without checking piston-to-valve clearance? A: No. Rotate the assembled engine by hand and verify all mechanical clearances.
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 CRF50 top end kit, XR50 cylinder head, Z50R piston rebuild, 50cc horizontal engine parts, CRF50 low compression, Honda mini bike cylinder 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.