300ex Engine mods...

[Jay300ex]

Well I started school today and my teacher in small engine mechanics said that we can bring in any engine that we have to get work done on it. I was just wondering though, I really dont want a big bore or anything on it like that will make the reliability go down, but what else can I do? I've heard better cams, rocker arms, port and polish. If I bore it up to anything probably just keep it at 300 exactly ( pointed out by someone here. )

ANy thoughts? I have the means to do this for pretty much nothing, buy a kit from somone hehe.

Jay

[mxracer08]

well, you could get a 305 kit and bore it to that, but there's no sense in not goin to the 330, it's just as reliable.

[Buzzsaw]

do all of what you stated standard boring with 11:1 piston, 316

[305exracer11]

i have a a 305 kit and it has lots of power and still reliable, but if i were u i would get a 330 kit.

[Jay300ex]

Well, I'm am not really knowledgable on what size bores will in the future show bad engine signs. But a 330 would probably be okay, and if it does give me problems down the road . . simple rebuild then because I will be a mechanic =P. Is there any places where I can purchase a kit that includes all the high quality parts I will need to install? I will do the work myself in school, how much you think it would all cost ( involving the engine i dont really want to go cheap and pay later for it )


Jay

[mxracer08]

you can buy a FST 330cc kit for $295, a FST oil cooler(gotta have) for $95, White bros cam for $100, White valve springs $135, you can get ur rockers hardened ?$$$, but i didn't and mine are still fine. You can get ur cylinder bored and re sleeved my a good machinest, and there's not much to installing all of the other stuff.

[Jay300ex]

so how does it respond to those changes for you? good i should hope?? I only plan on really using the ex for trails, having fun farting around, I had my dad pay for this 98 CR250r engine that I have and will put it in a frame after school. That will be my racer then ( me race quadS? maybe a dream but seems like fun!! ). thats still a pretty good amount of money for the quad right now, mayb ei will wait until next summer and get the suspension and axles this year ( just seems more logical that way ). But any good points on the kit you have or anyone with a simalar one would be coo.

thx
jay

[mxracer08]

the only prob that i had was my cam took away too much low-end, so i checked it on a degree wheel, and found that it was retarded like 5-6 degrees, so me and my dad advanced it like 10-12 degrees and now it has plenty of low end and still a lot of top.

[Jay300ex]

is that like a flaw in the wb cam or something? probably if i got that and it was off i would want to fix it off the bat instead of tearing it all apart again =)