Re: XL350R Tracker - It's Alive! Sort Of! With Pics!
I had an XR350, RFVC is a pretty good motor, had a few issues with magnesium clutch cover but removing screw and fitting stud cured the problem
Got my only first place on it (open class 4 stroke)
previous best was a second place in open class two stroke (on an XL185, sold my Yam 400 week before event :
)
If weather had been nice (instead of pissing down) I would have been eaten alive on XL ;D
Only 'improvement' , get a440 kit in it, lot more 'go' everywhere
(doh, I already said that)
Not sure about 21" front wheel, spoke a 19" rim on it?
If you have 36 hole hubs, just about all MX bikes now use a 19" rear wheel so you can get rims reasonable (or buy a used MX wheel from older bike with blown motor?)
19" front and rear would be even more 'different'
You Will need a fork brace if you fit better wheels/tyres (hell, you need one stock, I know how much those forks twist)