Author Topic: 550 rear sprocket question  (Read 5608 times)

0 Members and 1 Guest are viewing this topic.

Offline cwchan

  • Enthusiast
  • **
  • Posts: 227
Re: 550 rear sprocket question
« Reply #25 on: May 18, 2012, 07:39:44 AM »
hmm... reading this thread means i have a non-stock rear sprocket.   I only get to 100kph at around 7-8000 rpm....>:\

Offline lucky

  • Really Old Timer ...
  • *******
  • Posts: 6,715
Re: 550 rear sprocket question
« Reply #26 on: May 18, 2012, 07:50:59 AM »
17/37 is stock and what my 550's have that get 45-50MPG on good gas.  (I haven't measured with the ethanol contamination. I'd expect 3% down for that.)

Ethanol is not contamination.
Ethanol is ethyl alcohol.
Ethanol BTU=76,000
Gasoline (summer)=114,000 BTU

Ethanol makes gasoline burn cleaner.
Sometimes a 3% loss in MPG, and sometimes up to 40% less MPG!
Makes you wonder. Cleaner air though.

It takes .5 to 1.5 gallons of gas to produce 1 gallon of ethanol.

But direct fuel injection systems now use 65:1 ratio of air to gas!
Our old Hondas used about 14:1 air to gas.

Things are getting better.


« Last Edit: May 18, 2012, 08:04:28 AM by lucky »

Offline TwoTired

  • Really Old Timer ...
  • *******
  • Posts: 21,802
Re: 550 rear sprocket question
« Reply #27 on: May 18, 2012, 05:06:54 PM »
17/37 is stock and what my 550's have that get 45-50MPG on good gas.  (I haven't measured with the ethanol contamination. I'd expect 3% down for that.)

Ethanol is not contamination.
Yes it is.  Look up the meaning of contamination. Ethanol gas is NOT pure gasoline, it is adulterated/contaminated.

Ethanol makes gasoline burn cleaner.
Ethanol makes non-computer controlled engines burn leaner, and use more fuel per mile traveled.

Things are getting better.
Politicians and tax collectors must love you.

We had a separate thread about gasohol.  Did you miss it?  Or, are you cross posting/stumping for the corn industry?

http://mystarbrite.com/startron//content/view/14/37/lang,en/

So, now we get to pay more for fuel, get less value from it, have to buy products to counter it's negative effects, and get taxed more for each portion of a "consumer solution" that didn't have a root problem in the first place.  The government wins again.  Aren't you proud?

Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.