sleeveslave

Stock Banshee cylinders have sleeves that are "cast in"--in order to re-sleeve, you have to bore out the old sleeve. OEM cylinders that have been ported can be re-sleeved by purchasing OEM replacement sleeves and then spending lots of time doing the port match or by building custom sleeves using the cylinder as the porting template. It doesn't matter whether they're big bores or strokers, you'll get back exactly what you had. Aftermarket cylinders with sleeves are "drop-in" and you simply heat the cylinder to remove. The manufacturer of the cylinder should have replacement sleeves available, but if they don't you can go through the same process for custom sleeves as mentioned above. Aftermarket cylinders that have been plated can be sleeved--that's a custom process, too. Retaining Compound? NO, NO, NO! Any one who uses any kind of bonding or adhesive on a sleeve install doesn't know what they're doing or they're not using the correct sleeves or BOTH. Installing the new sleeve requires heat and a press--a freezer is not part of the process. Resleeving stock cylinders really isn't a DIY project unless they cylinders have been previously resleeved and you can find the correct size sleeves for the fitment. Aftermarket cylinders would be a bit easier if you can locate the correct replacement sleeve and have access to consistent source of heat, a press, a boring bar and a lathe.

You have lots of life left in your cylinders... no need to resleeve.

It doesn't make much sense to take someone else's idea of port shape/location etc. and try to make it work on a cylinder that's already been ported. So, you'll pay $150 or more for the sleeve, $150 installation and a port match charge for someone to go in a TRY to make everything right. The best way to preserve porting isn't by using a stock sleeve and making it work; the best way is to have a custom sleeve made using each cylinder as the porting template--that way you get back EXACTLY what you started with. It isn't any more expensive (probably less) than what you are contemplating. If you like the idea of a bridged exhaust, have it put in--not a big deal. Tech Staff Northwest Sleeve

Running this twin with one standard piston and one +.040 is not the best idea. I would normally agree to sleeve the damaged cylinder and bore it to match the good one---but if I am understanding that the good cylinder was bored off-center, in the long run you are better to sleeve them both now. (.060-.080 is A LOT)