BORETECH CLASSIC REBUILD - 1981 HONDA CR450R


November 6th, 2017.


This classic 1981 Honda CR450R landed in the Boretech workshop with instructions from the owner to give it the complete stripdown and nut and bolt rebuild.


The engine was removed and stripped and checked for wear and tear. The cases were taken back to the bare metal, shot blasted and repainted in-house to the original Honda fire-engine red. All the bearings and seals were replaced along with the con-rod and the barrel was bored in-house to accept a new Wiseco oversize piston. On the drive side, a DID ERT2 chain was fitted on NOS sprockets.

The frame was stripped and repainted in the original Honda red and the front forks and rear shock were stripped, serviced and rebuilt in-house and the steering head and rear linkage bearings all replaced.

The fork clamps were shot-blasted in-house and the head bearings replaced.

The wheels were stripped and the hubs shot-blasted and painted and the drum brakes fully cleaned and serviced. New SM Pro rims were laced to the hubs and Dunlop tyres fitted in the Boretech Tyre Bay.

New mudguards and side-panel plastics were fitted. The unique Honda flip-up front number plates are now obsolete, but after hours of trawling the internet, an original second-hand one was found. refurbed and fitted. The original plastic fuel tank was cleaned and polished in-house and fitted with the correct period decals and matching period seat cover.

Original exhausts are rare as hen's teeth, so a period DG full exhaust system was fitted.

Renthal bars in a bend as close to the original as is now available were fitted along with Scott Radial Grips and Motion-Pro cables and levers.

A new DT-1 air filter was fitted and Motion-Pro cables and levers modified to fit the drum front brake set up. The brake shoes where serviced and refitted

Sadly we don't have a 'before' picture, but the customer was well-pleased with the finished job pictured here.





For all motorcycle, automotive, ATV and kart engineering, rebuild and preparation services, parts and race consumables, contact: Boretech Engineering on 01273 495405, info@boretech.co.uk or visit www.boretech.co.uk
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