Illegal Yamaha 125Z Racing Bike

This article is taken without permission from http://www.mysportbikers.com/portal/index.php? option=com_fireboard&Itemid=27&func=view& id=1017&catid=52&limit=6&limitstart=6. Hope they will forgive me! Please go here for the original content of the page. What was modded on that bike…? block and piston – Original Yamaha 125zR block. – Bored tu 57mm using DT125(enduro) RK brand piston. – Ported and polish the block. Engine…

Arrow Racing Chamber + Muffler for 125Z/R

Why do you need to use racing chamber exhaust? The basic idea behind an expansion chamber is to use the momentum and pressure of the exhaust gases to create a pump that squeezes more air and fuel into the cylinder during the intake stroke. It does the same sort of thing that a turbocharger does,…