Was wondering whether anybody knew if the fins on the cylinder and cylinder head are aluminium or some ferrous type metal. Just bought a Ty 175 and the cylinder and head look like they have more paint on them than a desert tank. Was hoping to have them shotblast and polished if they were aluminium. Has anybody tried this ?

Regards

Gaz

Head aluminium

Cylinder aluminium with ferrous liner

Thanks for that. Looks like hours of polishing are ahead of me.

hours of polishing, but i wish i had'nt. the fins need constant attention to stop them furring up, some day i will get round to taking the top end off and painting black.

p.s. i know the case screws are a right mess, i could'nt wait to take the photos so i stuck the old ones in.

Edited March 18, 200917 yr by paul w

I stripped the paint off my 250 and had them vapour blasted looks great, when it comes back from rebore I will post pictures

hours of polishing, but i wish i had'nt. the fins need constant attention to stop them furring up, some day i will get round to taking the top end off and painting black.

If it's any consolation, we did some heat dissipation testing years ago (before liquid cooling was the norm) on raw aluminum MX engine parts vs. flat black and found that the flat black finish on aluminum parts reduced temperatures by up to 15%. A satin black finish (which would look better) would probably yield a little less effeciency but still was better than the natural finish. A rough, as-cast surface was better at heat reduction, rather than a smooth, polished surface, probably due to the greater surface area.

Jon