cylinder porting

Hello all, I just finally joined the SnoWest forum after years of reading useful information from many of you guys. I have a completed WR450F on a 2016 TS track which is a great machine. I'm in the process of building another snow bike with my KX500 that I just got a few days ago. I don't...

So I bought an older m8 that has 6k miles on the odometer, engine has never been apart. Older guy I bought it from said his wife and daughter rode it. I definitely believe that because of how good of shape the body is. I rode it last season and I feel like I wasn't getting the track speed that I...