hazy
Junior Member
I am running RON 98Just trying to give the best treatment for my bike.
I run 87 and always have
Can someone teach me how to notice/identify when there is pinging/knocking??? I've been hearing about it since I was a kid but can't say I've ever actually witnessed it.
I had always put in premium in the past. I just bought an 05 FZ6 and the manual says regular is ok. Just wanted to get an idea of what you all do, and the benefits if any. Thanks for your input.
The one on the left
:justkidding: I always use 87 and have never had an issue after 13600 miles.
That ping is the valves being slammed shut from the predetonation.
The dealer and manual say 87 so that is all I run. No sense in paying extra for no added benefit, right?
do your fuels have lead?
There is zero added benefit. It actually robs you of power. I said it above. There is less energy in higher octane fuels.
The pinging is the sound when the two flame fronts meet. Preignition is the cause and detonation is the result. When the fuel preignites it doesnt have a nice slow controlled burn like it should. It's more of an explosion. when the explosion from one side of the cylinder collides with the flame from the spark they crash and make that sound. Detonation is bad because it creates huge spikes in combustion pressures that destroy the engine internally. These huge pressures happen when the piston is still on its way up. Severe detonation can not only bust up pistons but bend rods.
This is why timing advances as rpm goes up. the fuel has a specific burn rate and you want all the energy to act on the crank. as piston speeds speed up, if you were to run the same timing as at slower speeds by the time the fuel finishes burning the piston will be way past TDC and have lost most of its mechanical leverage on the crank. thus reducing power output. when you advance it too much the cylinder pressures rise to fast and thus contribute to detonation.
If our engines are designed for 87 it means that the fuel is suitable and will not preignite and that it will make the most power. with everything else the same the higher octane will burn slower and there is a chance, because of ignition timing, that you wont get the full effects of combustion acting down on the crank.
Has anyone tried to prove this, on the dyno that running 91, 92, or 93 octane actually drops power compared to 87 octane in these engines? Has anyone ever looked at the timing tables for the FZ6? In order to run 87 octane in a high compression engine such as these engines, the timing in certain RPM ranges and throttle positions will be heavily retarded. Now, low throttle and steady rpm cruising the timing will be elevated. That is how you get high MPG, timing is through the roof while cruising in high gear to burn all possible fuel as efficiently as possible.
When I bought my motorcycle I asked the owner of the dealer what fuel he suggested and he said "run premium fuel, it won't hurt anything and for a few cents difference why run less?" Does anyone run 87 with the PCIII, exhaust and filter upgrades? I know with the PCIII, exhaust, BMC filter, and 89 Octane my bike didn't have power above 10,000rpm at all. It didn't seem to want to rev.
Regular because yamaha spent a lot of money for an engineer to decide what would work best in their engine.
Has anyone tried to prove this, on the dyno that running 91, 92, or 93 octane actually drops power compared to 87 octane in these engines? Has anyone ever looked at the timing tables for the FZ6? In order to run 87 octane in a high compression engine such as these engines, the timing in certain RPM ranges and throttle positions will be heavily retarded. Now, low throttle and steady rpm cruising the timing will be elevated. That is how you get high MPG, timing is through the roof while cruising in high gear to burn all possible fuel as efficiently as possible.
When I bought my motorcycle I asked the owner of the dealer what fuel he suggested and he said "run premium fuel, it won't hurt anything and for a few cents difference why run less?" Does anyone run 87 with the PCIII, exhaust and filter upgrades? I know with the PCIII, exhaust, BMC filter, and 89 Octane my bike didn't have power above 10,000rpm at all. It didn't seem to want to rev.