ThunderMax Timing vs. TPS (More Complex - Best Method) - Manual (Page 5)

Identify Where to Make Adjustments (Rules and Methods)
If you are experiencing PING during Throttle Roll On, and yet if you apply Full Throttle the PING
quits, then “lowering only the timing Belly” will correct that condition.
If you are experiencing PING during Throttle Roll On, and yet if you apply Full Throttle the PING
remains the same, then BOTH the Belly and the Full Throttle regions should be lowered
equally.
If you are experiencing PING during Throttle Roll On, and yet if you apply Full Throttle the PING
is worse, then BOTH the Belly and the Full Throttle regions should be lowered but the Full
Throttle region should be lowered more.
If you have NO PING except at FULL THROTTLE, then only the FULL THROTTLE area should be
lowered.
How Much to Adjust the Timing
It is hard to describe the adjustment required because of different peoples “perception” on
how severe the ping is.
Here are the “Rules” I use in determining how much timing to remove to correct for ping.
Very Light Ping: Engine Ping which is a “skipping (not a regular tap tap tap) and very irregular”
and hard to hear. Light pinging will definitely be occurring on every cylinder firing.
For Very Light Ping, a -1 to -2 degree retarding of the timing is first used. Most people will not
even bother to adjust because it is so light and infrequent.
Moderate Ping: Engine Ping which is “more regular and almost pings to the rhythm of the
rpm”. It is NOT totally constant. The rider feels he “needs to adjust it”.
For Moderate Ping a -3 degrees retarding of the timing should be first used.
Heavy Ping: Engine Ping which is “totally in rhythm with the engine cylinder firing” is
considered heavy ping.