Cg engine vs gy6 engine how to#
Cg engine vs gy6 engine upgrade#

Cg engine vs gy6 engine upgrade#

So you can see their room for a bigger cylinder upgrade for the 139QMB engine as well, cover in blog share GY6 Big Bore Kit 50cc Which will cover further in this blog share.Īnother example: if it was a 139QMB the '39' would mean that it has a 39mm piston with a cylinder outer skirt of 44.78mm, which may vary by manufacturer slightly off by 0.2mm, allowing it to slip into the 139QMB engine's crankcase bore opening 52.5mm max. You can see there is room for a bigger cylinder skirt thus's piston size upgrade for the 161QMK engine. And, vary by manufacture slightly by 0.2mm, its cylinder sleeve (skirt) could be 62.9mm which allows it to slip into a 161QMK engine's crankcase bore opening 65mm. This shows the one-cylinder piston size in millimeters, for example, if the engine code is '.161QMK', the piston size is 61mm. Cover more on blog share Locate GY6 Engine Code. NOTE: If you have the letter “P” after example “1P”, stands for (P)air valve horizontal engine. All GY6 engines are single-cylinder with single-piston, so this number will always be uno-one. The three digits and three letters that follow are the significant engine code that we cover, briefly here, and what these six-character codes mean. The first two letters are the acronym of the manufacturer for the make or model, 'BN' means the Chinese scooter model 'ZNEN,' created by the Zhongneng Industry Group. The engine code is followed by a secondary number below are the engine manufacture identification numbers which are not significant to us, really. The image above illustrates the red-dash rectangular box is where the engine code is engraved.

Cg engine vs gy6 engine how to#

How to tell if you have a GY6 A-Block or GY6 B-Block engine case?įirst, locate the engine code. They all use the same GY6 engine configuration as the original GY6 Honda developed. These brands of import scooter lines include Kymco, PGO, Ricardo Motors, Roketa, Strada, SUNL, Tank, Vento, Yamato, and many others. However, you can still find these GY6 engines in Chinese, Korean, Taiwanese, and other aftermarket manufacturing scooter brands. But, Honda doesn’t manufacture these so-called 'GY6 engines' any longer. Originally, it was assembled in 50cc (3.1), 125cc (7.6 cu in), and 150cc (9.2 cu in) engine sizes and could be found in Honda Elite and Spacey motor scooters. It comes with a built-in swing arm with an automated CVT transmission which is belt-driven. It has the capacity to produce 12,000 rpm and power more than 14 horsepower (10 kW) with customizations according to the riders. Somewhere between the range of 7.8 hp (5.8 kW) to 12.4 hp (9.2 kW) is the quoted standard horsepower rating. The GY6 engine is a 4-stroke single-cylinder with air or oil cooling design and it has two standard overhead valves. History, the GY6 engine was built upon the perfect scooter motor design technology in the 1980s.