BannedCR500Riders.com

Posted: **August 19th, 2011, 9:37 pm**

Ok, would I turn the stator clockwise or counterclockwise to retard the timing? My bike is spark knocking/detonating really bad (sometimes) and I dont feel like sounding big money on racing fuel, I barely ride as-is. I know I could find the answer if I dig around, but a definite, straight forward answer would be much obliged!

Thanks!

Posted: **August 19th, 2011, 9:58 pm**

the same way as the tire spins is retarding
or just look at the pickup as you spin the engine over and see what will make the spark happen later

Posted: **August 19th, 2011, 10:50 pm**

2strokeforever wrote:the same way as the crankshaft spins is retarding

Posted: **August 19th, 2011, 11:13 pm**

NightBiker07 wrote:Ok, would I turn the stator clockwise or counterclockwise to retard the timing? My bike is spark knocking/detonating really bad (sometimes) and I dont feel like sounding big money on racing fuel, I barely ride as-is. I know I could find the answer if I dig around, but a definite, straight forward answer would be much obliged!

Thanks!

Avgas is cheep high octane gas, may be worth a trip to your local airport

Posted: **August 20th, 2011, 4:40 pm**

I was told AV gas is higher octane but its not designed for higher rpm applications (piston planes dont spin high rpm's). its burn rate is slower and it requires rejetting. so you will probably lose some power but solve your pinging. Just my opinion. if you do run it, let us know how it goes. i may stand corrected.

Posted: **August 21st, 2011, 3:54 am**

i have run it for years and never had a problem never rejetted but i may also have got lucky

Posted: **August 21st, 2011, 9:22 am**

I have ran it for 30 years in everything, supercharged 914 sand rail (long time ago) Banshee, 11,000 RPM 4 stroke quad (had issues but I don't think they were fuel related) and the 500, runs pretty strong, and even Bob commented that he like's the smell

years ago a freind worked at Shell oil testing gas, I gave him a sample, the 100LL was 104 octane, couldn't say that it is exactly the same now but I would hope that the gas used in aircraft is very consistant.

Posted: **August 21st, 2011, 9:53 am**

We do have a local airport, but Im not sure how to approach buying gas from them.

If retarding the timing takes too much power away before solving the issue, I will definitely look into aviation gas.

Thanks!

Posted: **August 21st, 2011, 11:35 am**

Kuma wrote:I have ran it for 30 years in everything, supercharged 914 sand rail (long time ago) Banshee, 11,000 RPM 4 stroke quad (had issues but I don't think they were fuel related) and the 500, runs pretty strong, and even Bob commented that he like's the smell

years ago a freind worked at Shell oil testing gas, I gave him a sample, the 100LL was 104 octane, couldn't say that it is exactly the same now but I would hope that the gas used in aircraft is very consistant.

My brother is a flight instructor and he rides as well and he said dont run avgas because its octane can fluctuate drastically.

Posted: **August 21st, 2011, 12:11 pm**

NightBiker07 wrote:We do have a local airport, but Im not sure how to approach buying gas from them.

If retarding the timing takes too much power away before solving the issue, I will definitely look into aviation gas.

Thanks!

just take your gas cans to the refueling station, most small airports don't have a problem for off road use, no road tax so running it in a st car would be the same as running red deisel in your truck.
They usually all take credit cards and can fuel at any hrs. I just punch in N1234 as a tail number, always works.

Posted: **August 21st, 2011, 12:26 pm**

freeride588 wrote:
Kuma wrote:I have ran it for 30 years in everything, supercharged 914 sand rail (long time ago) Banshee, 11,000 RPM 4 stroke quad (had issues but I don't think they were fuel related) and the 500, runs pretty strong, and even Bob commented that he like's the smell

years ago a freind worked at Shell oil testing gas, I gave him a sample, the 100LL was 104 octane, couldn't say that it is exactly the same now but I would hope that the gas used in aircraft is very consistant.
My brother is a flight instructor and he rides as well and he said dont run avgas because its octane can fluctuate drastically.

I have never had an issue with it in 30 years of use. Can't say if the octane is constant or not, I don't run my jetting so spot on where it would matter. My thought is that the octane would be controlled more closely, if your car starts running crappy from some bad gas you can pull over and call AAA, a plane ride to catilina or over the rockys might get you dead.
Some hate it some love it, I've heard it has de-over, that it's designed for running at a specific RPM range, yada yada yada. I would love to see some dyno results between avgas and some comperable race gas. I'm pretty sure the race gas would do better, just a lot easier to to take 30 gal of avgas at 5 something than race at whatever it's going for.
It's all a matter of choice, for a knocking, pingging detonation fix it may be worth a gallon to try.

Posted: **August 21st, 2011, 12:27 pm**

NightBiker07 wrote:We do have a local airport, but Im not sure how to approach buying gas from them.

If retarding the timing takes too much power away before solving the issue, I will definitely look into aviation gas.

Thanks!

just take your gas cans to the refueling station, most small airports don't have a problem for off road use, no road tax so running it in a st car would be the same as running red deisel in your truck.
They usually all take credit cards and can fuel at any hrs. I just punch in N1234 as a tail number, always works.

Posted: **August 21st, 2011, 3:28 pm**

freeride588 wrote:
Kuma wrote:I have ran it for 30 years in everything, supercharged 914 sand rail (long time ago) Banshee, 11,000 RPM 4 stroke quad (had issues but I don't think they were fuel related) and the 500, runs pretty strong, and even Bob commented that he like's the smell

years ago a freind worked at Shell oil testing gas, I gave him a sample, the 100LL was 104 octane, couldn't say that it is exactly the same now but I would hope that the gas used in aircraft is very consistant.
My brother is a flight instructor and he rides as well and he said dont run avgas because its octane can fluctuate drastically.

idont know about the states but here you can get a test cert for every 205 litre drum sold i would have thought it would have to be very consistant please correct me if im wrong

Posted: **August 21st, 2011, 5:04 pm**

gregrobo wrote:
freeride588 wrote:
Kuma wrote:I have ran it for 30 years in everything, supercharged 914 sand rail (long time ago) Banshee, 11,000 RPM 4 stroke quad (had issues but I don't think they were fuel related) and the 500, runs pretty strong, and even Bob commented that he like's the smell

years ago a freind worked at Shell oil testing gas, I gave him a sample, the 100LL was 104 octane, couldn't say that it is exactly the same now but I would hope that the gas used in aircraft is very consistant.
My brother is a flight instructor and he rides as well and he said dont run avgas because its octane can fluctuate drastically.
idont know about the states but here you can get a test cert for every 205 litre drum sold i would have thought it would have to be very consistant please correct me if im wrong

Thats what I'm thinking too, I had to buy some Jet-A and needed certs with it for my work, airport had them, they need to know what goes in there tanks. If a plame goes down you can bet the FAA is going to hiking up that paper trail.

Posted: **August 21st, 2011, 5:06 pm**

yeah i have been told by the depot that it is always 100 octane or better never under but im only a average joe not a fuel expert by far

Posted: **August 22nd, 2011, 7:15 am**

How about a 30% mix of toluene to premium gas? That should get you to 97-99 octane depending on if premium is 91 or 93

Posted: **August 22nd, 2011, 7:56 am**

gregrobo wrote:yeah i have been told by the depot that it is always 100 octane or better never under but im only a average joe not a fuel expert by far

Exactly 100 or better which can be as much 105 to 106. Personally any high performance engine is going to want to use the octane for which its designed instead. Plane engines run at such a lower rpm and because of there design are not as octane sensitive as lets say a cr500. I been around av gas a long time but as kuma says everybody is going to have a different opinion and if you have good results run it because also as kuma said 5 dollar av gas is much better than 10 to 12 dollar a gallon race fuel.

Also if n1234 dosent work as a tail number use n3383r that is our familys plane number and will work for sure.

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