Okey Dokey,
I’d look around for a 21 front wheel with the right axle size and if you get the backing plate and front cable you’d only need to make some spacers. Ditch the 23″ wheel – it was an answer to a question NO-ONE should have ever asked.
Otherwise, you’re on the right track as far as sourcing a complete front end with the same size fork tubes – it will slide right in. Try A.R. Maxwells. They are a wrecker in VIC that I’ve bought a lot of stuff for and they seem to not be complete wankers – tongue in cheek (actually they have a great knowledge base and are cool to deal with).
Rear shock are super long and the only thing we’ve been able to source is Hagon double spring shocks that are that long. Sold a pair for an XL500 this week. Retail at $350. You will not set the world on fire with them, but then again what can you do with a 150kg 14hp trail bike… you have the power to weight ratio of a ride on mower with gear advantage.
HOWEVER… check these guys out because they make fire breathing 2 valve Honda motors…www.powroll.com – how about a bored and stroked 340 running 13:1. Ahhh the smell of av-gas in the air… They also have a healthy index of like minded lovers of old two valve Honda and such and list them on the appropriate page.
Happy hunting,
Rudy