Originally only bought one to pilfer for parts as i had numerous genuine carbs missing slides/caps because people don't seem to know how to remove a throttle cable from a carb so they leave the cap and carb attached to the throttle (one of my pet peeves is when i buy a bike/parts bike and the carb cap and slide is missing). But then i figured i might as well give one a go as is. Few tweaks to the air screw and it ran beautifully. Put one on a mates bike to, he'd cleaned put his carb half a dozen times, still couldn't get it to run 100% right. He was skeptical but in less than 5 mins we had his bike running better than he'd been able to in months of ****in around with it in his spare time