Yeepo Posted January 11, 2017 Report Share Posted January 11, 2017 Hello banshee hq. I recently bought a banshee after many years of taking a break from riding mainly because NJ sucks to ride. But anyways the previous owner had installed new cylinders and pistons. I broke in the top end by putting a whole gas tank of easy riding an low rpm. Being winter and not riding much I decided to take the motor apart to inspect it since I didnt trust the guy I bought it from. Well it has shitty Niche cylinders and pistons . Transfer ports roofs dont align at all with the sleeves. Pistons have marked up the sleeves too. Can these cylinders be port matched and saved, or just straight trash them? Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted January 11, 2017 Report Share Posted January 11, 2017 They can be ported. If you are serious about wanting to do lots of mods in the future, look at other options. Quote Link to comment Share on other sites More sharing options...
Yeepo Posted January 12, 2017 Author Report Share Posted January 12, 2017 The roofs of the transfer ports are about 1/16 higher than the sleeve port where they meet. If I raise the sleeve ports to match, will the timing change much? Quote Link to comment Share on other sites More sharing options...
sleeper06 Posted January 12, 2017 Report Share Posted January 12, 2017 They can be saved and ported too your desire. Quote Link to comment Share on other sites More sharing options...
SlowMoe Posted January 12, 2017 Report Share Posted January 12, 2017 The roofs of the transfer ports are about 1/16 higher than the sleeve port where they meet. If I raise the sleeve ports to match, will the timing change much? It wont change the timing that much, but should give you maybe 5hp or so on the top end. While you're at it, you can widen the port by about 1-2mm on each side. You can raise the corners of the exhaust port roof about 1-2mm more than the center, essentially making it flatter. Kinda like this: Quote Link to comment Share on other sites More sharing options...
Yeepo Posted January 13, 2017 Author Report Share Posted January 13, 2017 Ok cool. I will probably save these cylinders for spares. I am getting some used Oem ones to port. Quote Link to comment Share on other sites More sharing options...
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