I recently replaced my exhaust with a storm slip-on and installed a PC3 with the correct map. Prior to the new zorst I was getting between 80-90 miles before the fuel light came on and even less if I had been "making good progress". Im now getting 113-114 miles before the light comes on and that includes "making even better progress more often". Bit strange that what should be a richer map results in less fuel but to be honest, I have no idea if the ECU had been played with anyway as I bought the bike used and im sure it had a termi on before my purchase anyway. One thing for sure, it sounds and goes better than before and it has given it quite a bit more poke. Im sure there will be both richer and leaner parts of the map which may be the reason its efficient - low revs for example. Anyone else had similar experiences? JC
My 999s tends to do approx 100 miles to a tank when it's set up right. Has a termi full system set up by a good mechanic... I ditched my pc3 when it lost its marbles a couple of years back. Mine always runs on the rich side too and gives better economy than it did before... Just generally runs better.
Not sure if it got spiked or something... The bike developed a mystery misfire and after a full day messing with spark plugs, coils and checking electrical connections I realised it was the pc3! I was so peed off that I never used it again and my mechanic just set the bike up for me... Runs a dream now! My limited experience with my duke has made me think that the least possible amount of extra electrical items to go wrong the better
My 749 is standard and if I'm commuting I get around 85mls before the light cames on, but if I'm doing long motorway runs can go up to 130mls R
My bog standard 999 does better miles than my bog standard 749 did. The 749 was also more thirsty than my 916, which annoyed me (less torque, less power, more fuel. Wot??). I think in kms these days, but I'll do the maths for you. I have to be doing some weird road at some silly speed involving lots of red-lining for the 999 to give me less than 100 miles before the light. It has happened, but in over 20'000 miles it's been an exceptional occurrence. More likely is about 110 to 115 miles. Quite usual is 125 miles. Once last year it did about 135 miles and I was fairly sure the light had stopped working - but no! It's quite hard to predict. I do tend to ride it on the torque and don't spend much time over 6'000 rpm - there just isn't the space as you are quickly doing licence-shredding speeds if you wind it up. But I don't hang around. I don't spend much time in either traffic or built up areas. Bike delivers best fuel economy at about a steady 100 mph (sorry officer). I have noticed when it goes on to reserve and you start looking at the fuel economy gauge thing that going slower doesn't improve fuel economy at all. I suspect that best fuel economy is delivered at about 4500 to 5000 rpm. It's doing between 95 to 100mph at 5'000 in top, so you don't have to wring it's neck. Not so with the 749 which needs to be treated as a chicken destined for the table - plenty of neck-wringing - which is why I suspect the fuel economy was poorer. I've always wondered what the effect of ditching the cat would be, but I'm just too bloody old, sensible and green to do it. Probably makes very little difference. My 907ie gave better torque, power and fuel economy over stock with its carbon cans, but admittedly, it was a whole different engine.
