Is it possible to put a different engine on our bikes?

[lrojasma]

i wish i could put a liter engine on my FZ6. I just love the FZ6 looks, the chasis is the most beautiful thing on bikes, is even better than FZ1s, i just would love Yamaha would use a frame like this, like a weld free chasis on a liter bike i would love to buy that.

Meawhile just dream to put a 1000cc engine on a FZ6.