I have a buddy who just got a 98 cbr900rr as a first bike and it has some problems and I am trying to fix for him.I rode the bike when he first got it a couple weeks ago and noticed that it would miss a Little at lower rpms but once you nailed it,it ran pretty good. I took it as just not jetted properly.He had some charging issues and took it to a shop to get fixed and they found a wire on the stator that wasn't connected so they plugged it back in.The problem now is it doesn't run or even start at all.I did a compression check on two of the cylinders and they were both low one was 55 and the other was 60. I did open the throttle up and even opened the choke to try and get higher reading out of it. The owner doesn't know a thing about bikes but swears it didn't get hot,blow any smoke or nothing like that.The battery just wouldn't hold a charge is what started it all.Does anyone know what the compression should be ?160 -170?somewhere in that area is what I am thinking. what would cause it to lose compression like that ?I know worn rings,cracked block and a thousand other things could be the cause but I don't know why it have such a low reading with out getting real hot and cracking the head?I haven't really messed with carbed bike so maybe I am doing something wrong when I am doing the compression test.Is there something special you have to do with them that would be different then a F.I bike?please pass on some knowledge so I can help this guy out.thanks again
