AFAIK, our american friends can do the maintenance their selves without any warranty loss, but us poor european guys must pay money to the dealers and have the service book stamped, despite you can do it better and without loosing any bolt
The same thing happend to me, fortunatelly the bike was still on guarantee and they just replace the whole left handle control free of charge. There was some other guys in the spanish forum with the same issue
Here at Spain we have both 700 and 750 models. Mine is a 700XA. After riding a 750XA a couple of times, I can say for sure the 700 brakes more and better than the 750, just because the 700 has one more piston. This is the only reason I keep my 700XA instead of changing to the 750 model. There at...
Here is a resume of what the service manual says about the spark plug:
-Always use specified spark plugs on this motorcycle (NGK IFR6G-11K)
-Do not adjust the spark plug gap. If the gap (1.0 mm) is out of specification, replace with a new one.