lukedorris Posted April 20, 2004 Report Posted April 20, 2004 Last season my 2000 banshee just died on me during a ride. The thing would not fire for anything. I checked my compression and had nothing on the left cylinder. I take it in to my local shop to see about rings and possibly boring it, whatever it needs to get going again. They call me back later that week and tell me I have $900 worth of damage because my rod and piston separated within my cylinder and tore my sleeve to shreds. Is this a common problem in Banshees? I decided since i have to re-sleeve it, it only makes sense to go with a big bore kit. I ordered a 409 kit off of this shop that sells stuff on Ebay. I take my machine back to the shop with my kit and now they are telling me that the outside diameter of the sleeve is too big to fit into my cylinder. Is this right, or does the shop not know what they are doing? Can they bore my cylinder out to make the bigger sleeves fit? I dont see how the place I ordered my kit from could have sent another two-stroke, twin cylinder big bore kit. The banshee is the only one around. If the kit can be put in my quad, what else do I need to do to my banshee? Do I need to re-jet again? Will I eventually need bigger carbs? Most importantly, how fast am I going to go? I already have pipes, jets, reed valves, and a K&N filter. Quote
dragbanshee02 Posted April 20, 2004 Report Posted April 20, 2004 I believe that you have to bore the old sleeve out and then you have to bore the cylinder itself to except the new sleeve it should be a tight fit as you do not want the sleeve to move it should be press fit. But I have never done this and this is what i have picked up from reeding posts and doing some research as i am planning to do this in the near future. Quote
TerminalVelocity Posted April 22, 2004 Report Posted April 22, 2004 That shop does not know WTF they are doing. You should grab your parts from them and RUN. Of course the sleeve is Bigger! It's a Big Bore Sleeve. The original sleeve is cast in to the cylinder and must be bored out of the cylinder. This is precision machine work due to the tolerances it is necessary to hold to ensure a proper fit of the new sleeve into the cylinder. Additionally, port work MUST be done (again, properly) to ensure High Power Output and Long Life out of your new Big Bore Cylinders. I'll be watching this forum from now on, so if you have any further questions, post'em and I'll answer within a day or two. Terminal Velocity Quote
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