SOLD – Marston Sunbeam 500cc Vintage motorcycle Model 9/90 Cylinder head c/w engine barrel

SOLD – Marston Sunbeam 500cc Vintage motorcycle Model 9/90 Cylinder head c/w engine barrel


Off to Canada

Marston Sunbeam 500cc vintage motorcycle Model 9/90 TWIN PORT Cylinder head c/w engine barrel.

This is a spare engine barrel and twin port cylinder for a Model 9/90 Marston Sunbeam motorcycle. Remarkably, all fins are good. There is the tiniest little nibble on one of the head fins but there are NO chips or repairs.

In this condition, these are very hard to find. They are worth having as spares, even if they just sit on the shelf. The barrel bore is 79.8mm. It could do with a clean and maybe a very light hone.

The cylinder head has one valve guide fitted. The exhaust threads could do with a clean up with a wire brush. The spark plug thread is OK.

There’s not much else to say as there isn’t anything nasty to report.

Super cheap.

Other Sunbeam parts: I have some. Please get in touch.




  • International shipping available. Please ask.
  • Combined shipping available if you buy other parts. 
  • I usually ship to most destinations. If you don’t see a price, please ask. Shipping is in addition to the listed price for the item.

Viewing: Please come and check it over before you buy. It is at PE28, near St Ives in Cambridgeshire.

Collection: If you don’t want it shipped, I have plenty of space. If you can’t collect for a while, it’s not a problem. However, I will need to be paid very soon after the sale. Thanks.

Payment: This site has a facility to pay online. Good old fashioned money on collection is preferred. I can accept payment through PayPal or by bank transfer as well.

Import Taxes: Please note that IMPORT DUTIES are not something I can control. If you are buying from outside the UK, there is a chance that you will have to pay import taxes. Import taxes vary from country to country. If there are charges to pay, it is the buyer’s responsibility to research the cost and pay the duties. The price that you see on my advert is for the item and not the item plus whatever taxes might be due.







Ref: 1122-H169

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