1960 18hp Fastwin and 1958 18hp Fastwin

[boyd66k20]

I have the 60 and a chance of getting the 1958. Are the parts interchangeable on these years?

 

[racerone]

Most parts are the same except for parts to do with how the cowlings fit on them.

 

[Chinewalker]

'60 has a thermostat, '58 does not. Carb & knob linkages are different to accommodate different cowlings. Other than that and the aforementioned cowling changes, there's quite a bit of interchangeability.

 

[F_R]

Many/most parts are the same. However, quite a few are different. Cylinder head, cylinder block, exhaust covers, exhaust housing are some of the major differences. If you are buying the '58 for parts, it is a gamble unless you have specific parts in mind that you need. Then compare part numbers for verification.