I've fitted Cbr600 forks and GSXR yokes to a V50.
Japaneese yokes(Trees) tend to have less offset than Guzzi ones slowing steering.
The reduced offset means the bars/switchgear/forks/your hands hit the tank.
Check the reduced offset doesn't mean the front wheel hits the alternator.
Headset tubes can be different lengths,affecting how much fork is between the yokes and how much is below it, my forks have 1.5mm less travel than the free length of fork tube.
I had to turn down the stem nut to acceive this or the fork lowers could have hit the bottom of the yokes.
Cali yokes are 45mmn as are CBR600 F4 (? last of thr right way up ones), both are easy to find.
They have about the right amount of offset but the steering stem is cast in so won't press out, just bend, that lesson cost me 100 pounds.
Might work on a big block though.
Sticking to an entire front end means you can possibly fit it by just altering steering bearings at the other end of the difficulty spectrum using different yokes, forks and wheel might mean you have to make a special wheel spindle, wheel spacers, steering and wheel bearings, brake adapter plates, mudguard fixing, some form of speedo drive mount, clock mounts, your steering lock won't work, lockstops, cable guides, headlamp mounts, indicator mounts etc.etc.
I took the second path.
