New Moto Guzzi Door Mats Available Now
I assume the 650 has timing belts and Desmo valve action.... If the belts need replacing ( something like every few years) and valve clearances checked, and you can't do it yourself, a dealer may charge $500 or more ??? Something to consider unless the seller has a receipt showing it was done...
Did both on my Cagiva Elefant (same basic engine except both carbs are in the V). Easy peasey even though I'd never done one before. Valves were all still in spec. so didn't need adjusting. Might have been a *bit* more work if I had to do that.
The only issue I've heard about with this engine is the design of the ignition timing pickup, which is apparently set inside the crankcase and vulnerable to failure due to oil soaking. Solution is to fish it out and reseal it with plastic dip or something. Possible I misunderstood when the seller explained it.
I have some special Teflon wires that were meant to go on my Alallazura but I sold the bike (ok, traded it) back to the guy I got it from. If someone needs them let me know.