I read a FAQ about the new DG3 in another forum. It said " (NOTE: When using the DG3 and Offset Key, PREMIUM fuel is required.)" If the timing with the key and the DG3 is 33-34*, wouldn't this mean we need to run premium fuel with the Dynatek CDI also? I looked through all paperwork that came with CDI and found nothing about this. Its really not a big deal, but i would like to know. Thanx

 

I was wondering the same thing. Hopefully Forceof1 will be able to shed some light on the requirement.

My P650 has been running fine (no detonation) on regular 87 octane.

 

If your jetting is correct you may be able to get by with 87. I talked to Scott at Dyna and he said he recommended plus at least and preferably premium. Premium especially if you suspect your jetting is off.

 

The label under the seat says 91 stock.

 

That 91 number is reasearch octane number, RON. We don't use RON in this country at the pump, as far as I can find info about it on the web. I have only seen antiknock at the pump (many states). The Kawasaki manual says 91 RON. But this is completely irrelevant because it is not how our gas is labeled

We use the anitknock index, (RON + MON)/2, in this country. The Kawasaki manual states 87 for the antiknock index. So, if you use more than 87 in a stock 650/700, you are just wasting money because there are no benefits. Some people claim it slows their machine down. I can't say that, but I am sure it doesn't add power. Using high octane in a car that has an electronic antiknock feature and requires the higher octane will usualy increase the power and raise fuel economy. But, that is not the case with the stock Prairie.

The Dyna CDI FAQ says use the same fuel that your manual specifies. But, if scott has since stated "plus" or "premium", that is what I will use after I get a CDI.

 

I agree that the numbers on the pump are the anti-knock index numbers. The numbers in my state are 85, 87 and 91. I would take that to mean that 'plus' = 87 and 'premium' = 91. The owner's manual specificies anti-knock number of 87 or above. It looks like the 'plus' fuel Scott is talking about is the same as the original recommendation for the Prairie P650/700.

 

I didn't know about the RON thing thanks. For the folks that can figure this out, a I do know that higher octain is slower burning than lower. so this my be what does the slowing down of machines and the elevation may factor also. Just guessing.