NeroGuzzi
Cruisin' Guzzisti
The engine originally pinged constantly when hot throughout the rev range. The GT ECU/PCV/AT cured the constant pinging. A problem I still have is a sudden and severe pinging when I moderately twist the throttle between 4-5,000 RPM. This has happened with the bike since new for over 15k miles, but the frequency has now increased. Although the ECU reflash, PC5, and AT have done wonders for the engine's performance, it has not eliminated this one problem. Here is some background:
-2007 B11
-The severe pinging is immediately followed by a significant drop in power
-This will happen when the engine is hot, regardless of outside temperatures
-A moderate twist of the throttle b/w 4-,5000 RPM can result in severe pinging. For example, trying to spin up RPM's to change gears, changing lanes to pass a vehicle in the slow lane, or exiting a turn. It happens at a very inconvenient, and might I add, dangerous point of the power range.
-The severe pinging event is not necessarily repeatable. It could happen only once on a ride and not again despite replicating the same conditions and situation.
-A WOT from 4-5,000 RPM will likely prevent the sudden pinging
-A WOT from anywhere below 4-,5000 RPM will bypass the potential of a pinging event completely
-There is no rattling, pinging, or knocking any other time. The engine sounds and runs great all other times
-The noise seems to emanate more from the RH cylinder
-I liken the noise to what you would hear if you would have manually advanced the timing too much on an old school V8
-TPS, TB Balance, and tappet gaps are good
-All maintenance intervals have been either met or exceeded. Outer plugs have tended to wear a little, but inner plugs looked almost new when I changed them.
-The AT does not make radical adjustments after a sudden and severe pinging event.
Although the engine did this before I added mods, here is my current set up:
-PC5, ECU reflash, AT
-13.2 AFR throughout the rev and throttle range
-GT-r Y-pipe
-Stock silencer
-GT-r open air lid with K&N filter
The bike is no longer under warranty. When it happened a few times under warranty, I mistakenly attributed the symptoms to lean fueling. Any feedback would be appreciated. Thanks.
-2007 B11
-The severe pinging is immediately followed by a significant drop in power
-This will happen when the engine is hot, regardless of outside temperatures
-A moderate twist of the throttle b/w 4-,5000 RPM can result in severe pinging. For example, trying to spin up RPM's to change gears, changing lanes to pass a vehicle in the slow lane, or exiting a turn. It happens at a very inconvenient, and might I add, dangerous point of the power range.
-The severe pinging event is not necessarily repeatable. It could happen only once on a ride and not again despite replicating the same conditions and situation.
-A WOT from 4-5,000 RPM will likely prevent the sudden pinging
-A WOT from anywhere below 4-,5000 RPM will bypass the potential of a pinging event completely
-There is no rattling, pinging, or knocking any other time. The engine sounds and runs great all other times
-The noise seems to emanate more from the RH cylinder
-I liken the noise to what you would hear if you would have manually advanced the timing too much on an old school V8
-TPS, TB Balance, and tappet gaps are good
-All maintenance intervals have been either met or exceeded. Outer plugs have tended to wear a little, but inner plugs looked almost new when I changed them.
-The AT does not make radical adjustments after a sudden and severe pinging event.
Although the engine did this before I added mods, here is my current set up:
-PC5, ECU reflash, AT
-13.2 AFR throughout the rev and throttle range
-GT-r Y-pipe
-Stock silencer
-GT-r open air lid with K&N filter
The bike is no longer under warranty. When it happened a few times under warranty, I mistakenly attributed the symptoms to lean fueling. Any feedback would be appreciated. Thanks.