Oil-to-gas ratio?

[K5 750]

What bike do you have and what ratio do you run?

[noobi]

gasgas ec125. 40:1 or 250ml of oil per 10L of petrol

[vr4king]

old cr125 40:1

castrol tts

[Taz]

Ktm 525exc 13litres gas, No oil :lol:

[B0000M]

06 CR250, 40:1 tts

[skidMark]

my old zxr250 4 stroke i ran all petrol and no oil then cooked a big end bearing

it wasn't cool

(p/t)

[flyingcr250]

50:1 BP ultimate with motorex oil

[clmintie]

KDX 200/Kx85/KX125 32-1 TTS/R30 98

CRF 100. I put 20ml of R30 in a 10l container, if I'm going to be following it for hours, I may as well enjoy the smell.. :headbang:

[A&R]

KDX 200/Kx85/KX125 32-1 TTS/R30 98

CRF 100. I put 20ml of R30 in a 10l container, if I'm going to be following it for hours, I may as well enjoy the smell.. :headbang:

Ah.... nice one. I love that smell to reminds of the old race events in the 70s.
much the same... kdx200/kx85/rm85 all tts and a bit of r30 for the smell. the crf100 also a bit of r30 from time to time in the petrol.

[vazza]

ktm250exc 50:1

[cheese]

Where do you get R30 from?

Hey is TTS packaging now gold?

[clmintie]

Where do you get R30 from?

Hey is TTS packaging now gold?


Super cheap and yup, it's now in gold bottles.....

[scott411]

50/50 avgas and 91, with 33 to 1 Elf 2xt oil,
RM125,

[barty5]

50/50 96 and avgas

[barty5]

Where do you get R30 from?

Hey is TTS packaging now gold?

That shows how long it been since you bought oil lol

[camchain]

EXC200 @ 45:1 - but oil amount is auto-increasing due to month-old evaporating stale gas.

[IIIRII]

I would love to know the rationalle for using 50/50 avi and 91 or 50/50 avi and 96
please explain
Ta

[bogan]

32:1 95 to motul hardout stuff, 98 CR125.

[B0000M]

I would love to know the rationalle for using 50/50 avi and 91 or 50/50 avi and 96
please explain
Ta

me too. to me this makes for 97.5 octane 50% unleaded.... why not just buy 98?

[tommorth]

ktm200 32:1 tts and whatever gas is handy

[vanmajor]

2009 KTM 250SX - 40:1 Motul 800 + 98 octane.

[scott411]

I would love to know the rationalle for using 50/50 avi and 91 or 50/50 avi and 96
please explain
Ta

the reason i run avgas mix is,

two strokes like leaded fuel, it prevents detonation,
it is not really about octane,
however avgas burns slow, thats why we mix it, i use 91 because there is not a lot of difference between that and 95 and its cheaper,
i run std 2 strokes on 95, but i have put a bit more compression into my 125 thats why i run avgas, more for safety,

modern 4 strokes do not like or need avgas, i run 98 when i ride these

also avgas is very consistant, where pump fuel is not,

[flyingcr250]

the reason i run avgas mix is,

two strokes like leaded fuel, it prevents detonation,
it is not really about octane,
however avgas burns slow, thats why we mix it, i use 91 because there is not a lot of difference between that and 95 and its cheaper,
i run std 2 strokes on 95, but i have put a bit more compression into my 125 thats why i run avgas, more for safety,

modern 4 strokes do not like or need avgas, i run 98 when i ride these

also avgas is very consistant, where pump fuel is not,

whats the mixture in the race fuel sold at the kumeu bp?

[scott411]

no idea sorry, i get mine from challange pukekohe, which is just avgas,

[cheese]

Interesting. Along teh lines of getting your 2 smoker to smell with that lovely castor smell, can I just get castor oil to add? or just use R30? they ran out at supercheap... :(

[Paulus]

Okay, so wandering off topic a bit here - someone once told me that avgas had a number of additives to help it burn at high altitudes and low temperatures and that it was unsuited to use in motorcycle engines. No 1 racing was supposedly a different mix (used to be able to get it at a pump at the local gas station) and was designed for use in said engines. This may be rubbish. Does anyone know?

Back on topic: 07 Husky WR250, 40:1 Castrol TTS, 95 octane pump gas.

[IIIRII]

I could explain but I cant type for shit so read this

http://www.csgnetwork.com/jetfuel.html

[barty5]

I could explain but I cant type for shit so read this

http://www.csgnetwork.com/jetfuel.html

thats all bout jet kero fuel

[tommorth]

whats the mixture in the race fuel sold at the kumeu bp?
its pretty high my kdx used to love that stuff can't remember th octane rating pretty sure its written on the pump it was 3 bucks a litre last time I got some though

[theblacksmith]

KDX250 - 95 fuel 32-1 ratio

[barty5]

whats the mixture in the race fuel sold at the kumeu bp?

its just straight race fuel i had a look at the pump tonight on my way past rated at 105 octane $3.19 per liter hence people use avgas which is round $2.30-$2.50per liter

[IIIRII]

Ummmm....


AVIATION FUEL ADDITIVES

Aviation fuel additives are compounds added to the fuel in very small quantities, usually measurable only in parts per million, to provide special or improved qualities. The quantity to be added and approval for its use in various grades of fuel is strictly controlled by the appropriate specifications.

A few additives in common use are as follows:

1. Anti-knock additives reduce the tendency of gasoline to detonate. Tetra-ethyl lead (TEL) is the only approved anti-knock additive for aviation use and has been used in motor and aviation gasolines since the early 1930s.

2. Anti-oxidants prevent the formation of gum deposits on fuel system components caused by oxidation of the fuel in storage and also inhibit the formation of peroxide compounds in certain jet fuels.

3. Static dissipater additives reduce the hazardous effects of static electricity generated by movement of fuel through modern high flow-rate fuel transfer systems. Static dissipater additives do not reduce the need for `bonding' to ensure electrical continuity between metal components (e.g. aircraft and fuelling equipment) nor do they influence hazards from lightning strikes.

4. Corrosion inhibitors protect ferrous metals in fuel handling systems, such as pipelines and fuel storage tanks, from corrosion. Some corrosion inhibitors also improve the lubricating properties (lubricity) of certain jet fuels.

5. Fuel System Icing Inhibitors (Anti-icing additives) reduce the freezing point of water precipitated from jet fuels due to cooling at high altitudes and prevent the formation of ice crystals which restrict the flow of fuel to the engine. This type of additive does not affect the freezing point of the fuel itself. Anti-icing additives can also provide some protection against microbiological growth in jet fuel.

6. Metal de-activators suppress the catalytic effect which some metals, particularly copper, have on fuel oxidation.

7. Biocide additives are sometimes used to combat microbiological growths in jet fuel, often by direct addition to aircraft tanks; as indicated above some anti-icing additives appear to possess biocidal properties.

8. Thermal Stability Improver additives are sometimes used in military JP-8 fuel, to produce a grade referred to as JP-8+100, to inhibit deposit formation in the high temperature areas of the aircraft fuel system.