478 Cc Big Bore

[73watermutt]

anyone rode a YFZ with one of these kits? If so whats your opinion?


http://rover.ebay.com/rover/1/711-53200-19255-0/1?type=2&campid=5335909541&toolid=10001&customid=&ext=120362763053&item=120362763053

[florentino]

the worst mistake ever.. go with a 450 can rev more.. and last way more.. its also depends it you drag race,track or flat track,
i always make power by shaving some pounds of the bike..