clrkaw26 Posted May 1, 2014 Report Share Posted May 1, 2014 I'm a new banshee owner and just bought a 04, it seems pretty stock except for a 380 bore and boost bottle which I hear is a joke, I have not opened the motor yet to verify the bore or crank but would love good info of some things to do to it to get more out of it, I can't let those 4 strokes take me!!!! I want to make it fast and reliable and your info on some good mods and how to correctly match it and where to get them at a good price would be appreciated, was goung to start by timing and a cool head but have never dealt with all these dome sizes, also airbox mod but no idea what I should rejet it to. Advice appreciated. Quote Link to comment Share on other sites More sharing options...
chevota84 Posted May 1, 2014 Report Share Posted May 1, 2014 Dirt or sand? Sent from my SCH-I545 using Tapatalk Quote Link to comment Share on other sites More sharing options...
clrkaw26 Posted May 1, 2014 Author Report Share Posted May 1, 2014 Dirr Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted May 1, 2014 Report Share Posted May 1, 2014 I doubt you have a 380 bore. More likely it was bored "30 over" which is actually .030 over stock and only = 356cc It is worth basically ZERO as far as performance. Same story for the "Boost Bottle" But WELCOME You found the right site to guide you toward some real power. Start reading everything you can…………. Quote Link to comment Share on other sites More sharing options...
clrkaw26 Posted May 1, 2014 Author Report Share Posted May 1, 2014 Dirt Quote Link to comment Share on other sites More sharing options...
sstaton1983 Posted May 2, 2014 Report Share Posted May 2, 2014 Stock stroke with 67 mm piston should be a 380. What's the limits on a stock cylinder? 66? Quote Link to comment Share on other sites More sharing options...
sstaton1983 Posted May 2, 2014 Report Share Posted May 2, 2014 Stock stroke with 67 mm piston should be a 380. What's the limits on a stock cylinder? 66? And what 4 strokes are you having trouble beating on?..stock 450s or with 3 mods?.. Quote Link to comment Share on other sites More sharing options...
clrkaw26 Posted May 2, 2014 Author Report Share Posted May 2, 2014 I have not raced anyone yet, just got it monday. My buddy has a modded trx 450r and I absolutely can't let him win, I beat him pretty bad on my kx 125 spare bike and he can't come close to my kx 250 but I will never hear the end if he beats my banshee. I don't really know what is inside this motor but I do know its not stock, much stronger than my friends banshee and he has ported cylinders, milled head, rad valves, 28 mm carbs without the airbox, different cdi box, timing plate, t5 pipes and running on c 12. I still have the crap gas that was in it, reed spacers look stock, cylinder and head are oem airbox still factory and tors is all intact so I'm assuming the carbs have not been modified or that would be the first thing to do, I really don't want to break it down to see what is there just to put it back together unless its completely necessary for matching the rest, I am really just wanting to upgrade the head, timing, airbox and jetting and that should be enough, if anyone has stuff like that for sale or nerf bars, bumpers, motor dress up kits, wider control arms and cool stuff send them my way. Quote Link to comment Share on other sites More sharing options...
foxrider603 Posted May 2, 2014 Report Share Posted May 2, 2014 I can only assume that if it still has the complete tors system chances are probably everything internal is stock 1 Quote Link to comment Share on other sites More sharing options...
clrkaw26 Posted May 2, 2014 Author Report Share Posted May 2, 2014 That's kind of what I thought at first, but no way no how is this thing stock, I have raced motorcycles since I was 4 so 32 years and I have beat pretty much every bansh. I have ever rode with and stock banshees are really kind of slow, this one is not, I'm just going to have to tear it down, I cant stand not knowing what crank it has, what bore it has, if the head is milled or cylinders ported and I really don't see being able to properly build this thing correctly without knowing that info. Quote Link to comment Share on other sites More sharing options...
WINDYCITYJOHN400 Posted May 2, 2014 Report Share Posted May 2, 2014 Stock stroke with 67 mm piston should be a 380. What's the limits on a stock cylinder? 66? Without sleeves the general rule of thumb is 66.5 I however have a 66.75 in my long rod bike. That makes mine a 379. No way you can go 67 without cracking cylinders. Quote Link to comment Share on other sites More sharing options...
sstaton1983 Posted May 2, 2014 Report Share Posted May 2, 2014 I bet it's stock. Quote Link to comment Share on other sites More sharing options...
do-work-son Posted May 2, 2014 Report Share Posted May 2, 2014 Take you intake out and use a mirror to read the number/letters on the side of the rods. Or use a zip tie down the spark plug hole and measure the stroke. You can pop the head off and replace it with a cool head and see if the number are readable on top of the pistons . Between those two you should have a good idea of what ya got Or plug chop it make sure it is not lean and ride the hell out of it till she blows then build it later Quote Link to comment Share on other sites More sharing options...
Uf21 Posted May 2, 2014 Report Share Posted May 2, 2014 I dont see how your buddy beating you is so bad. Quote Link to comment Share on other sites More sharing options...
clrkaw26 Posted May 2, 2014 Author Report Share Posted May 2, 2014 Ok guys, I just took the head off and the piston says 100. From what I have read .100 means its bored to 66.50 mm and makes it 382cc. Am I misunderstood, reading wtong or is this correct? Quote Link to comment Share on other sites More sharing options...
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