I picked up a 550sx today I think its a 95. I was told it had a new top end rebuild not long ago. It has about 140compression and is hard to turn over ( not sure if thats high or not). It has a new starter and it does barely start up and run ( just has an autozone battery that might not be peak power either). Also it bogs down if you give it a quick throttle. It doesn't have that quick rev. like I would expect. He said he was playing around with the high low settings on the carb but couldn't get it right. So my to question are about the compression hard to turn over, and do I need to adjust the carbs or a rebuild kit on the carb. Thanks for any help.