whats the best big bore kit?

[99'300EX]

I have a 300ex what would be the best big bore kit for it? do the give much more power/speed??

[51]

i'd go 330 i hear they can smoke a stock 400 in a drag race..that would be cool because then you'd have reverse goto

www.powroll.com
or www.sparksracing.com

there are many options out and it is up to you on how far you wanna go lata toby

I have the 329cc big bore kit from http://www.powroll.com/ it adds a ton of torque to the bike and elimanates a lot of shifting on the trails. As far as being able to beat the 400, I think the 400 might still have more top end . A lot depends on your gear ratios and tire size .

id say the 330 for trail riding and reliability but if you also want a drag mototr to put in for some draggin some days buy another engine and get it bored to 410 i hear those things do like 7 1\2 seconds on the 1\8 mile but they arent as reliable as the 330

[99'300EX]

how much did it cost?and have u had any problems with it? does it give u anymore top end?