370cc kit questions

[Deuce]

Hey Everyone,

 

So I have to replace the lower seals in my banshee motor and am kicking around ideas on what / if i should do anything to build the motor while I rebuild and refinish the bike. I know suspension is key to speed and endurance so thats my main focus first before motor work. But anyway I am looking to build a bike for aggressive trail / mx (not full out mx because i have my 250R for that) but really just a bike to have fun with off the track, and on the track should I decide to use it. I am not looking to build a drag bike.

 

Anyway I figured since I have the bottom end apart I should get the crank checked out and if anything trued and welded (I prefer to do things right the first time, especially while I have them apart so there are fewer concerns). Now would it be worth going with a 370cc setup, and is this the 4mm rod stroker that everyone talks about?

 

You'll have to forgive me because I am still new to the whole banshee thing. But anyway would this be too much motor for what I'm doing? Also what is the average cost for this setup? If its not really good for my application, I'll probably just do the standard rebuild and go with some porting, bolt on's (PC pipes, reeds, carbs, etc), and call it a day. I just was thinking with the stroker it would give me a more useable powerband rather than the peaky typical banshee one where its more on the pipe.

 

Anyway, I'd appreciate any input and info so I can be steered in the right direction with my project/build/rebuild, and so I can do things right the first time.

 

Thanks

[cjc]

A 370 could be built a couple ways, a stock stroke with oversized 66mm pistons

or a +4mm crank and stock bore is a 373

or a 397 for both used together.

porting would be a great gain on either ,a must for the +4 crank to make the best power .

[Coupelx]

at 66mm on stock cylinder you are nearing the end of their life.