just wondering whats the best one to get?

If anyones got one that they wanna sell?

Motorbike Carbs?

Edit: If so I've seen a great article on the web somewhere when a guy synched his carbs using ping-pong balls...it's a big DIY, a mate of mine tested it and was fairly happy with it. Google for it mate

Try the Twinmax electronic balancer. I'm not bike expert, but they can be used with bikes and cars..