Classic look, modern implementation

Thanks to brand new molds, the castings are also exceptionally clean: The surface is smooth, without heat cracks or splashes - visually very close to early Vespa-50 Crankcases or Rally-180 casings, for example. This high-quality appearance is continued in a look that is exactly true to the original: no allen screws that detract from the look, no tuning parts that are absolutely necessary for the function. All original Frame Parts can still be used.

Nevertheless, sensible improvements have been incorporated: The cylinder mount and crankcase have greater wall thicknesses so that there is sufficient material for milling and spindles. Cracks on the auxiliary shaft mount are now a thing of the past. The Disc Valve sealing surface is designed to be as large as possible. In the Sport version, the alternator side is spindled to 98.8 mm, so that in addition to the standard Crankshaft with 57 mm stroke, SIP Long Stroke Crankshafts with 60 and 62 mm also fit.

Technical details

• Construction status similar to Lusso III generation; internal Oil Seal of the Driveshaft can be used
• With Axle and holes for Oil Pump / separate lubrication
• With Flange and Bolt for electric starter motor ("Elestart")
• Oil Seal seats with wedge-shaped groove, suitable for Rubber and metal oil seals
• PX Needle Bearing on the alternator side
• Extensive scope of delivery, incl. M8 cylinder stud bolts, Rubber Engine Mounting Bushs etc.
• Large Disc Valve sealing surface
• Crankcase reinforced on the side and in the auxiliary shaft area
• Reinforced cylinder base area
• Suitable for assembly with standard Gasket Set

Conclusion: A Crankcase according to the Bavarian proverb: There is nothing better than something good.

These SIP products fit perfectly - SIP TIP:

• Gasket Set SIP 92976000 in unsurpassed quality
• Engine Revision Kit 91720052 with bearings and Oil Seals
• Checklist for Engine assembly and torque specifications here
• Screw kit in original look

Opinions of the press and experts

"I am proud that SIP has been able to incorporate its experience in building powerful touring engines into the development of these Crankcases - and that we are the first to have these cases in our range."

-André, exhaust gas sniffer at SIP, test bench department