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HPSP RACING LC135/Y15ZR SUPER RACING CYLINDER BLOCK ASSY (TECH 2)

RM380

Complete performance cylinder block assembly from HPSP Racing, "Tech 2" spec, for the Yamaha LC135 and Y15ZR engines. Oversized bore kit for big-bore builds.

Option

In stock · Estimated delivery: 3–7 business days (West Malaysia)

Product Details

Overview

Complete performance cylinder block assembly from HPSP Racing, "Tech 2" spec, for the Yamaha LC135 and Y15ZR engines. Oversized bore kit for big-bore builds.

Key Features

Complete cylinder block assembly (Tech 2 spec)
3 oversized bore options: 63mm, 65mm, 66mm (+4mm slip)
Matched to specific cylinder head/valve sizes
Fitment for LC135 and Y15ZR engine cases

Specifications

Brand: HPSP Racing
Product: Racing cylinder block assembly
Model/SKU: Tech 2
Type: Big-bore performance cylinder block
Main spec: 63mm+4mm slip (head/valve 20/23); 65mm+4mm slip (head/valve 22/25); 66mm+4mm slip (head/valve 22/25)
Compatibility: Yamaha LC135, Y15ZR

Variants & Setup

Each bore size is matched to a specific head/valve size (20/23mm for the 63mm bore; 22/25mm for the 65mm and 66mm bores); head and block must be matched, not mixed. Larger bore raises displacement/power potential but needs a matching piston, head and supporting tune.

Installation & Package

Requires full top-end teardown and rebuild with a matching piston kit, gasket set and cylinder head; recommended for an experienced engine builder. Package includes 1x cylinder block assembly per selected bore size.

Summary

HPSP Racing Tech 2 big-bore cylinder block assembly for Yamaha LC135/Y15ZR, in 63mm, 65mm and 66mm bore sizes.

Important Notes

This is a racing big-bore part, not a stock replacement; confirm piston, head and valve sizing before ordering. Displacement changes may affect road-legal compliance. Exact resulting cc figures are not verified.