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…