SPUTHE 60º ENGINE
The Sputhe 60º engine is quite a bit smoother than a 45º engine. It is more powerful because of the duel intakes and a lighter, more rigid valve train. It is also quite a bit stronger due to the wider 60-degree angle. There is no need for piston-to-piston relieves and the bearings are much larger.
Harley-Davidson incorporated a number of the 60º’s features into its Twin Cam series engines. The Sputhe Sixty has been running since 1992. H-D uses the same crankcase venting system, the same scavenging system and the same type of lifters as the Sixty.
During the past 13 years, the Sixty has been tested in a number of configurations, single and duel carbureted, as well as fuel injected in displacements from 78 ci to 125 ci. We built a 120 cid injected alcohol engine for Danny Grotto in Australia. He has been drag racing the same engine for 11 years without failure.
*Not in production at this time.
Tel: +1 (530) 268-0887
PO BOX 2553
Grass Valley CA 95945
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