It now has 25/22mm valves with better porting/flow. We also kept the combustion chamber the same size and changed the angle of the valves slightly.
This will really wake up your stock engine and is comparable in power to the much larger Chinese 124cc engines!!! Lightweight aluminum cylinder with steel sleeve - Cast in mounts on cylinder for aftermarket skid plates - Oversized cooling fins on cylinder for efficient heat dissipation - 52mm high compression piston with rings, pin, & clips - Head gasket kit and clutch cover gasket.
High performance race camshaft (for the Race Head only) - Race Head Larger valves (now 25/22mm) and better flow for increased performance. Also has bigger cooling fins. Includes all necessary parts and comes assembled! The exhaust valve has been upgraded to stainless steel (21-4N material).Includes: 20mm carb, intake, heatstop, gaskets, mounting hardware/wrench, long adjustable throttle cable, and a angled dual layer foam air filter. Installation Note: It will save a lot of time and effort if the oil pump is installed while installing the bore kit (requires cylinder removal). The item "88cc Big Bore Race Head & Carb Kit Honda Z50, XR50/CRF50 XR70/CRF70, & CT70" is in sale since Tuesday, June 10, 2014. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Other Motorcycle Parts". The seller is "hondaproducts" and is located in Beaverton, Oregon.
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