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Old 02-05-17, 01:29 PM   #5
Senior Member
Join Date: Aug 2011
Location: Clitheroe
Posts: 185

Sounds like an aero-main, you will probably find that the engine is a 420cc BSA. Whilst 'Sisis' has been around for 80 years, it now belongs to Howardson, they also make Dennis mowers. They do have the documents etc, but I am not sure if any of the Sisis staff still have any involvement in the company.
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