I've just come from an FZ1 to an 09 X and I can recommend the change. From an online 4 the difference in the way the bike makes power is marked..... But similar to a twin. They are surprisingly quick and handle well.... But I've found this goads me into riding like a tit everywhere. Good fun! After 350 miles I'd recommend one, try and get a test ride. I bought brand new old stock and paid 1200 less than current list price, so there are deals to be done! There is lots of good advice on here, well tested by members, so do lots of reading and choose your tinkering carefully. I've done the snorkel removal and CO1 mod and sounds great!!!!