will it hurt ?

[hsoj300ex]

ok so ive been told i either need a coil or a cdi so i thought what the hell i might as well upgrade but my quad is currently stock and i dont want to hurt anything iwas going to go with a kit i found on ebay http://cgi.ebay.com/AMR-REV-BOX-COIL-HONDA-TRX-300EX-TRX300EX-FOURTRAX-300_W0QQitemZ200432760185QQcmdZViewItemQQptZMotorc ycles_Parts_Accessories?hash=item2eaab93579 but i dont know if it will hurt anything or if it will even give ne more power on a stock motor?

[Grimzella]

not sure if it will hurt a stock engine or not. i hear 50/50 conflict on these coils & rev boxes. Some say the work... and some say they aint worth the money. maybe what we need here is some input from site members who have installed and used these. Do they work.. just a little.. maybe alot? i have full mods but stock coil and rev limiter.. Do i need to upgrade?

Lets see.