27th Mar, 2024 13:00

National Motorcycle Museum | Solihull, West Midlands

Lot 212

1971 Honda CB500 Four K0
Fitted with genuine 4 into 4 exhaust system

Sold for £9,315

(including buyers premium)

Lot details

Registration No: WWU 641J
Frame No:
Engine No: CB500E-1003807
CC: 500

  • Early CB500 K0 model restored at great expense
  • Fitted with a genuine Honda HM323 exhaust system
  • Supplied with numerous receipts and current V5C

This Honda was purchased in 2019 by a retired Engineer with over 50 years of experience who has a passion for mechanical engineering and vehicle restoration. This is the latest project from a line of restorations that include several British and Japanese motorcycles and cars. This original K0 variant had been imported from South Dakota in the USA and required a full restoration. The mileometer had just over 12,000 miles displayed which is believed to be accurate based on the fact that there was very little wear to the engine. The bike was fully stripped down and all parts were examined, restored or replaced. There is a huge library of receipts amounting to thousands of pounds from reputable retailers and Honda specialists.

The renovation has been completed to the original US specification, such as retaining the slightly higher (and very comfortable) handlebars so that it remains true to its original specification (the K0 was not originally imported to the UK). After measuring the bores it was confirmed that the engine had not been bored out previously and the bores were in perfect condition. The top end was rebuilt using high quality parts including new pistons and rings and the bottom end was inspected and found to be in good order. The carburettors were stripped, ultrasonically cleaned and rebuilt using new jets and needles. The frame and its components were sent away for powder coating, the head stock bearings were replaced and forks refurbished including new seals and stanchions. The electrical system was fully overhauled and the switchgear renovated. A new battery was fitted and an Optimate lead installed to maintain the battery through the winter if the bike isn't being used. The chain and sprockets were replaced with good quality D.I.D components. All the chrome work was re-chromed at Howells of Walsall which is a business held in high regard within the classic vehicle restoration world. The wheels were refurbished with new rims and spokes and new tyres and tubes in the original sizes. The wheel bearings were replaced and brakes fully overhauled with the rear brake drum skimmed due to slight ovality.

Most importantly, the vendor managed to acquire a full set of new old stock Honda HM323 exhausts at great expense which were still in the original boxes plus a new old stock petrol tank and side panels from a friend who had them in storage for a number of years. A local bodywork specialist who works for a number of British Superbike teams painted the tank and side panels in the original colour which looks beautiful especially when the sun is shining. The bike runs beautifully and has completed roughly 200 miles since restoration and is now ready to be enjoyed throughout the Summer. The vendor is planning to ride the bike to the auction venue and it comes supplied with numerous receipts and a current V5C.

For more information, please contact:
Mike Davis
07718 584217


Auction: National Motorcycle Museum | Solihull, West Midlands, 27th Mar, 2024

An auction of classic motorcycles & vintage scooters taking place at the National Motorcycle Museum, Solihull, West Midlands. Venue Details

To enquire about entering your classic or performance car into the auction please call our sales office on 01925 210035, email sales@HandH.co.uk or click here: Enter Your Classic Motorcycle Enter Your Vintage Scooter 

All our professional valuations are complimentary and without obligation.

To take part in the live online bidding please click 'Register to Bid | Sign In' at the top of the page  Register to Bid


Tues 26th March from 12pm
Wed 27th March from 9am

View all lots in this sale

All successful bids must be paid in full by midday the day after the auction at the latest.

You can collect your new pride and joy from our venue until 1pm the day following the sale or our partners are on hand to help arrange safe transportation:


Do you have an item to sell?

If so, contact one of our friendly specialists for your free valuation by completing the form below and someone will get back to you as quickly as possible.

If you prefer to speak to humans, don't hesitate to call our office on +44 (0)1925 210035

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