Best FUEL for our bikes...

[RØKSTA]

So, debating time, possibly.


....Whats the BEST fuel for our 4 stroke off road bikes?

Should we be running the highest octane we can in our jap bikes?

OR

Does it matter?

How about for our 2 Stroke Friends???


Enlighten us all


// Rob

[little.whittle]

I normaly run 98 in mine... Never ever have fouled a plug

I know someone whos bike used to foul plugs and he was told to rune half race gas and half 95-98..... He now doesnt foul plugs


I would use 98 in all

[RØKSTA]

So BP Ultimate 98 in a 4 Stroke would be sweeeeet?

[little.whittle]

yeeeeess think it would be the best

[RØKSTA]

yeeeeess think it would be the best

MEAN Sorted

So can people with bumble bee bikes still buy high octane av gas from Kumeu BP?

[p.dath]

This has been discussed quite a bit before. Unless you engine has been turned for a higher octane fuel like 98, it's not likely to make that much difference.

Perhaps you could fill in your bike in your profile so we new what you had ...

Using 98 is like giving a lot of extra money to the oil companies for something your most likely going to need a stop watch to be able to detect the difference with.

[little.whittle]

This has been discussed quite a bit before. Unless you engine has been turned for a higher octane fuel like 98, it's not likely to make that much difference.

Perhaps you could fill in your bike in your profile so we new what you had ...

Using 98 is like giving a lot of extra money to the oil companies for something your most likely going to need a stop watch to be able to detect the difference with.

KTMs are all ment to be run on hi octane fuel as to the modern race bike.. Bikes such as DR-Z's shouldnt be too much afected by what fuel you put in.
A lil off topic but in modern cars you can notice a huge differce in what fuel goes in.. Especialy the smaller ones

[BASS-TREBLE]

I've experienced higher mileage with 98 and 95. On the FZR that is

[RØKSTA]

In my VY Holden you can def tell the diff between regular shitty 91 and BP ultimate 98.

Oh yea, I have a bike now, YAY I can fill in that part.

[vtec]

It's a fair question.

My Honda Prelude vtec gets a loss of power and idles a little low when I put 91 octane in it. So I run at least 95 octane in it, to prevent any damage.

However, my CBR250RR used to run more powerfully and smoother on 91, as that is what it was designed to run on.

My 600cc race bikes and anything high performance and reasonably big seems to favour higher octane.

So unless you've modified your engine, I would stick to the engineer's specifications. I think you can safely say with a big reasonably slow revving 4 stroke single that 98 will be suitable. You don't really want detonation, and they are very high performance engines straight out of the factory. I wouldn't run 91 in one of those bikes... This is advice from someone who doesn't really know and has never run a motard or a 4 stroke dirt bike.

[tommorth]

I got some of that race gas from kumeu about a year ago bike ran very very well on it but at $3.50 a litre I don't bother very often bike still goes faster than me on 95 or 98

[RØKSTA]

I got some of that race gas from kumeu about a year ago bike ran very very well on it but at $3.50 a litre I don't bother very often bike still goes faster than me on 95 or 98

Wow didnt know it was that expensive, never bought the stuff!!! Cool tho!

[K6K]

the higher the octane rating the less likely it is to detonate under compression (knock) higher compression engines need the high octane fuels. Cars have knock sensors which retard the timing (reducing the power) if knocking is detected but I'm not sure about modern 4T dirt bikes.

[barty5]

MEAN Sorted

So can people with bumble bee bikes still buy high octane av gas from Kumeu BP?

yes you can still get it at the BP there use to be a car rental place on the corner of sunnybrae rd and parity pl that sold it as well havnt been there in last year or so thay may still do it

[IIIRII]

Like others have said, there will be no noticable power gain going from 96 to 98 unless you alter the timing but it could run smoother at idle.
If the engine has a lowish c/r it will run better on lower octane, exactly like a car engine.
The higher the octane rating the slower it will burn / which is why you need a HIGHER compression ratio
No amount of higher octane fuel will make it produce more power using the factory ecu.
Remember though that ron and mon octane ratings are different / so USA fuel specs for you bike may not actually be what we have in NZ etc:
90 mon = 98 ron etc:
My car makes about 100hp more at the wheels on 98 than it does on 96 but thats after a remap to suit.
Theres lots of ways of raising octane rating including mixes with avi and adding tolulene.