I'm looking at a bike set up for avgas.

As avgas is difficult to get hold of, maybe expensive, I wonder what the advantages is, using avgas and what it takes to set the bike back to normal tankgas:
Ignition timing ? Change of compression, heads ? jets for sure.

Someone told me its lower octane than tank gas. Is this correct ??
_________________
Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom


Last edited by pbekkerh on Thu Nov 22, 2007 11:31 pm; edited 1 time in total

avgas100l is 110 ron or 98-102 mon.
gives better protection against detonation

You can use higher compresion ratio without detonation.

u could use shell vpower instead of avgas, shell claim it has a octane rating of 99 RON and i use it in all my bikes as it doesent make much of a difference price wise to normal petrol on a bike.
_________________
Honda nc23 CBR400 AERO 1986, 1990 honda NC23 Tri-Arm, 1987VFR400 NC24 Rothmans Rep, NSR250 MC16 1987, CL250s 1983. Moto guzzi zigolo 110cc 1958. Fantic 50cc 1972. Suzuki Cobra Race bike 500cc 2t 1975 , GP125 1975. Triumph T110 1954. BSA Thunderbird 1955. Ariel VB 600 1952, 1990 MuZ 125 etz.

BP Ultimate 102 unleaded is as it says 102 ron but you can only buy it at a few places:


Forthview
10 Builyeon Road, South Queensferry, West Lothian, EH30 9YJ

Also available

All Saints Self Serve

Commercial Road, Portsmouth, Hampshire, PO1 4BU
Byron Connect
407 High Road (A406 North Circular), North Finchley, London, N12 0AP

Chicheley Park Connect
Tickford Street, Newport Pagnell, Buckinghamshire, MK16 9BD

Egham Hill Connect
1 Egham Hill (A30), Egham, Surrey, TW20 0ET

Newbury Centre Filling Station
758 Eastern Avenue (A12), Newbury Park, Illford, Essex, IG2 7HU

Newham Way Service Station
Newham Way, (A13 Westbound), Canning Town, London, E16 1QX

Premier Connect
99 Chaseside, Southgate, London, N14 5BU

Tudor Filling Station
London Road (A20), Allington, Maidstone, Kent, ME16 0HE

Wavendon Gate Connect
Newport Road, Wavendon, Milton Keynes, MK7 7AG

More compression, more advance, leaner jetting = more power Without any of the above its a waste of money and on the street its kind of unpractical.
_________________
1995 A kit TZ 250
1994 Rothmans NSR 300sp SOLD
1998 RM 250 freestyle/motorcross
1998 Meathanol burning CR 500 AF super retard/motorcross/sand dunes/play bike

As Jeremy says, you're wasting money unless you adjust your settings to take advantage of the fuel characteristics. This goes for any fuel, not just avgas.

I used to run my street bike on avgas 100LL, but I was a little worried about the 200 litre drum at my house, so I switched back to pump fuel when it ran out. This meant lower compression, less ignition advance and a richer carb setup. Lost a couple of ponies, and lost that delicious smell, but much easier just to stop at the gas station to fill up.