devon1996 Posted October 31, 2020 Report Share Posted October 31, 2020 How many hours do you get on a plated cylinder vs oem cast? I only put 4 tanks of 32:1 av gas through my stockers and they already need an overbore. The builds a 4 mill stroker with 66mm blaster pistons. It spent the entirety of those 4 tanks at wide open throttle on the limiter but I was expecting more than one season out of a top end regardless. I'm thinking about getting a set of athena 68mms instead of going to 66.25 on my stock cylinders. But it's not cost effective if they won't last at least 100 hours before replating. I don't use the shee enough to justify the 1400 for cheeta cylinders. I'd rather just buy another yz250 at that point. I do know that I'm going to go to 16:1 on this build to try and get it to last. Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted October 31, 2020 Report Share Posted October 31, 2020 You've got a machinest problem not a bore problem... I'd stay away from Athena Are you sure they are oem & not niche Sent from my SM-A505U using Tapatalk Quote Link to comment Share on other sites More sharing options...
97Screamer Posted October 31, 2020 Report Share Posted October 31, 2020 You have another problem if youre getting 4 tanks out of a bore. I wouldnt run Athena. Driveline cylinders are a great value. Quote Link to comment Share on other sites More sharing options...
devon1996 Posted October 31, 2020 Author Report Share Posted October 31, 2020 Any easy way to tell if they're oem? They look like yamaha quality castings and the bike had a bunch of quality parts on it when I got it so I don't imagine the dude put niche cylinders on it. But the machinest might have set it up loose I guess. When I tore it down the ring gap was .032 and .036 and the piston clearance was .007. there's no scoring the bores are completely smooth Quote Link to comment Share on other sites More sharing options...
375hp banshees Posted October 31, 2020 Report Share Posted October 31, 2020 Pics of symbol @ intake sides iircSent from my SM-A505U using Tapatalk Quote Link to comment Share on other sites More sharing options...
devon1996 Posted October 31, 2020 Author Report Share Posted October 31, 2020 18 minutes ago, 375hp banshees said: Pics of symbol @ intake sides iirc Sent from my SM-A505U using Tapatalk I'll take a look tomorrow before work. Thanks. So what is so bad about athenas? I saw I can get just the bare cylinders for like $400 which seems really cheap for a nikasil jug. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.