Boss Z7 Nds-Tech tuned engine

The Boss Z7 7-port on-road engine is hand-tuned and assembled by Nds-Tech and features a coated crankcase, hand-tuned ABC liner and specially treated backplate to increase the overall performance of this 3.5cc on-road engine. Other features of the Z7 include a crankshaft with silicone insert and two Swiss-made ball bearings with the rear one being a ceramic type.

Source: Boss Engines [boss-engines.com]