Different fuel types?

[EJK]

Another thought just went through my head, Perhaps something has changed the airflow rate through the engine. Does the bike have a standard exhaust, or an after market exhaust?

Obviously aftermarket exhaust installed with cat converter removed but fuel map not properly setup for reduced back pressure, hence running rich. Had the exact same symptoms with my old ZX10R. Exhaust ran dirty but sounded nice tho.

Solution? Petrol station has nothing to do with it. Get a PC5 and dyno tune it or something fancy.

[Big Dog]

I wouldn't put 91 in my lawn mower. Spoken to a couple of industry insiders and the quality of that fuel has convinced me to run 95.

Most lawnmowers sound like a sack of hammers and spanners being dragged down stairs on 91. Most are tuned for 95+.


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[onearmedbandit]

Most lawnmowers sound like a sack of hammers and spanners being dragged down stairs on 91. Most are tuned for 95+.


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It's an expression, but the point remains the same.

[Big Dog]

This is sounds a little out there to me but greater minds than mine seem to agree...

Off the air box on many injected bikes is a little drain pipe. On carbed bikes this used to drain onto the back wheel. On injected bikes I have owned it goes to a tube with a means of blocking it.
On the hayabusa it was a tap on the CB it is just pinched of and you need to pull the thing off to empty it.

When this is full fuel economy is affected as the bike runs rich.

I don't get it and maybe someone smarter than I can explain... I just do as I'm told and empty it every service and check it after any particularly heavy rain while riding.

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[BikerChick101]

My old gs500 always seemed to run the best on caltex 91, anything else and it would start running rough almost instantly (when filled from almost empty). I was told it was something to do with the company's additives. You just notice it more with a bike than a car because their engines are more sensitive

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[The End]

Obviously aftermarket exhaust installed with cat converter removed but fuel map not properly setup for reduced back pressure, hence running rich. Had the exact same symptoms with my old ZX10R. Exhaust ran dirty but sounded nice tho.

Solution? Petrol station has nothing to do with it. Get a PC5 and dyno tune it or something fancy.

Another thought just went through my head, Perhaps something has changed the airflow rate through the engine. Does the bike have a standard exhaust, or an after market exhaust?

Hornet owners around the world have the same issue I am facing - all with varying levels of modifications or completely stock bikes.

My bike had this issue when completely stock, and still has the issue with aftermarket cans - no difference between the two.

I've been advised from Honda NZ that my model doesn't have a cat converter.

I'm just going through a list of things to try and fix it, before moving to something like getting a PC3 and Dyno tuning it, which will cost a sh*t load of money from what I've been quoted - and the great thing is that it doesn't even fix the smell for some people.

[Tazz]

I notice a difference between fuel brands on my WR. The bitch does way more back firing from Challenge 95 than any other brand. Could be worth trying a different flavours just for shits and giggles.

Obviously aftermarket exhaust installed with cat converter removed but fuel map not properly setup for reduced back pressure, hence running rich. Had the exact same problem with my old ZX10R.

Solution? Petrol station has nothing to do with it. Get a PC5 and dyno tune it or something fancy.

[Akzle]

one choons one bikes for ones fuel. Rather than detunes ones fuel for ones bike.

96 all the time. Calories are good.

[nzspokes]

Wow that is interesting. So does the FI system have any feedback system to adjust fuelling?

Yes via airbox and water temp. Its a basic system.

[nzspokes]

Hornet owners around the world have the same issue I am facing - all with varying levels of modifications or completely stock bikes.

My bike had this issue when completely stock, and still has the issue with aftermarket cans - no difference between the two.

I've been advised from Honda NZ that my model doesn't have a cat converter.

I'm just going through a list of things to try and fix it, before moving to something like getting a PC3 and Dyno tuning it, which will cost a sh*t load of money from what I've been quoted - and the great thing is that it doesn't even fix the smell for some people.

You know the fix, but you havent done it.

[The End]

You know the fix, but you havent done it.

$$ and it doesn't fix the smell issue, only relocates it.

I've got a thermostat on order, and am going to try that first as it is cheap compared to the other options...

[Gremlin]

Yeah, mine has always been a touch rich, talking 100k over 8 odd years. I leave it as is... not a major except the plate gets dirty from the swirling behind.

Running a K&N air filter, aftermarket exhausts with probably not much baffle left... As you've said, fixing it costs plenty, hence leaving it. It's an older design so it's not going to be as fuel efficient.

I run it on 91 exclusively (Caltex almost all the time) and wouldn't touch any brand with ethanol in it.

[The End]

As you've said, fixing it costs plenty, hence leaving it. It's an older design so it's not going to be as fuel efficient.

For me the fuel efficiency isn't a worry.

The biggest reason I cannot justify the low mount exhaust mod is the cost - its a big project.

It also doesn't fix the exhaust smell, it just relocates it - meaning at traffic lights you are still getting a stinky exhaust smell on your clothes.

Blows my mind that after all these years no one has found a cause/fix on this bike...

[Gremlin]

Blows my mind that after all these years no one has found a cause/fix on this bike...

I have exhausts that look stock (heat shield over the top as well). Dirty air goes out the back and I never have an issue... well, I always have a top box, so maybe this affects things?

[The End]

I have exhausts that look stock (heat shield over the top as well). Dirty air goes out the back and I never have an issue... well, I always have a top box, so maybe this affects things?

Keep in mind some people get it the smell and other's do not. If you ever want proof of how bad the smell is, feel free to come and smell my jacket/bags some time