2003 VTX 1800C valve timing?????
Here is my problem.... My 2003 VTX 1800C has always seemed like it should do better on fuel economy. I know, get a honda spree if I dont like it. LOL. I dont really care about the economy, but distance between fill ups. I only get about 85-90 miles before light comes on. And it takes about 3 gallons to fill. So I messed with this and that, Cobra FI2000, plugs, ground fix, etc. I have just been dealing with it. But here is what changed my thinking. My buddy recently sold his bike and was going to get a bike just like mine, only an 2002. We had to travel a while to pick it up and I checked compression on my bike before we left so we could compare. Mine was 80 front 90 rear. But I did not check it wide open throttle. We picked his up and checked his wide open throttle and it was 105 front 105 rear. I realized I screwed up checking mine. So when I got home I rechecked. 110 front, 140 rear. Factory is suppose to be 95psi. I thought MAYBE carbon build up so I ran a few tanks of Techron additive. Ran those two tanks running her pretty hard. And now Im about 105 front and about 130-135 rear. A little change. Pistons look the same when I look down the plug hole as far as black. Can see some shiny piston, but they look the same. I have read a few threads on High Compression on one cylinder caused by valve timing being off like it skipped a tooth or two. Mine is on the back Cyl, so everything I read says its a real pain to get the rear timing cover off. Have to lower the motor down, etc. So I was hoping to have someone explain to me how being a tooth off or two could cause high compression.... I just dont understand it. Also if someone has other ideas, or ways to check the timing would be cool..
Thanks in advance.