If you have by chance seen any of my threads regarding my WR, you'll be familiar with it's recent history. To make a long story short, some time back we were adjusting the valve clearances and the half-circlet thing from the intake cam fell in the engine (we didn't realize this at the time - bunch of newbies to engine work). Ran the bike for a race and a few rides and then swapped out the exhaust cam for the 03 yz exhaust cam. One ride later the bike died. When fixed, it was discovered that the circlet ripped apart the stator and flywheel. Got that fixed, raced it - heard a familiar noise (more pieces of the circlet in the engine still). Took it back in to the place that had originally cleaned it up (got the circlet out and replaced the flywheel etc) and had them search for more pieces they neglected to get the first time. They found more pieces and did a good job of getting everything else out. Judging by the amount of metal retrieved, we're certain it's been completely eradicated. But while at the shop, the mechanic said we didn't have enough compression. Was reading at 90lbs, and he said it should be at 140lbs. First question - is that right? Should we be expecting 140lbs of compression? Second question - this obviously makes suspect the idea of a top end, but I have a question regarding the 03 yz exhaust cam. It has auto-decompression. When we put that in, we took the old compression cable out and just left the spring and bolt in the engine where the cable used to be. Could that be letting out compression? Is that right - or should we have put something in there to plug it up? Do you think we need a top end? I really can't do a top end at the moment money-wise after all we've been through with this thing recently. I'm hoping there's something we needed to do extra on the 03 yz cam that I wasn't aware of.