I'm planing on making my 250X a 330 with an 80mm piston and the rod from a 300EX and I was wondering how reliable the kits are?

 

are you talking about the FST 330 kit?
cause I want to know how reliable they are too.

do you need to rebuild them often?

 

hm..i'll let you guys know on that stuff..

i am going to post a full review of the FST330 soon,

comparing it to a modded 400ex. With a White Bros exhaust, FST port and flow, high comp piston, and web cam, and some carb(i forget what one)

 

As one ATV rider to the next,but i wanna share something with you all.I have a 98 warrior with a 440cc kit from FST.I will say the motor rips and is reliable.But I just wanna say I got the worst service ever in my entire life from Mickey Dunlaps Four Stroke Tech.I'll sum it up quick.I sent my motor in december 98,was told it should be done in march.I was dicked around,never returned my phone calls or responded to my letters,gave me excuse after excuse,etc,etc.I finally received it in Sept 99 after i repoted it stolen and got the Police involved.The guy just didnt care about my business.I lost a whole year of riding cause of him.I just want to warn you in dealing with him,because i would hate to see the same happen to somebody else,which i know it has.

 

FST has given me good service so far. He always answers his own calls, never spoke to anyone else.

He HAS dicked around a lot, and told me my motor will be shipped out this week. I had to send in money..so that slowed it down, i can't get a COD because no one is home when UPS arrives.

He has had it since, Jan 10th though. Thats a long time to just resleeve, and port and flow mod and CDI!

but he is the best in my mind. TC racing is too expensive. For the same motor, but with only a 300cc he wanted 1,300

 

Hey I had a thought Get the kit from FST like I did when I made my 330ex then have a local reputable cycle shop do the labor. This cuts out alot of downtime. I even installed the parts after the sleeve was installed in the cylinder.Saved a lot of cash. As far as reliability it is still running after three years.

 

I actually rode with my friend this weekend who had a 330 kit. It is one fast machine and it gave my other buddy a run for his $$$ on his 400ex. I have an almost stock (pipe and jets) 300ex and i got blown away in a drag. It is very torqy and he has had it for about a year.