***Caution: Strictly Opinion Follows Take It For What It's Worth, ignore what you don't agree with, your results may vary and I ain't takin' no responsibility for what you decide to do.*** My bike was dealer prepared out of specifications being set at 82% rather than the factory specified 76% and I have over 22,000 miles on it with no problems. Having raced cars and built motors I understand the principle of advancing the timing and what it does. Generally speaking the more advance you can feed the more better the engine will run...up to a point. Older cars had a set advance, such as 6° BTDC, in addition they also had two forms of variable advance; vacuum advance, and centrifugal advance, usually in the form of fly weights in the distributor. You could advance or retard the timing by rotating the distributor in one direction or another. Anytime you start advancing the timing you are enviting two issues, first is the motor may become very hard to start once it is hot. Not that big a deal on a car, open the hood and turn the distributor back to retard it until it will start. The second issue is deadly serious to a motor and that is pre-detonation, or "pinging". Pre-detonation occurs when the fuel ignites in the cylinders before it is supposed to. This can be absolutely disasterous to an engine. What starts happening is the fuel gets ignited by compression, a glowing piece of carbon or other hot device in the cylinder. When an engine starts pre-detonating all sorts of things can occur. Probably top on the list is that the connecting rods now start smashing the rod bearings, you begin to pit the piston tops or cylinder head tops or, in some cases even the cylinder walls. All of those are not good things. Continued...