bill825

new to the c 50 love it so far want to inprvoe fuel mileage from 42mpg to better going to get stock air filter any other ideas i bought a 08 c 50 had 6000 miles when got in august now has 10,000 was wondering if one of them fuel prosser would help or is this average for this bike

JamesPA

The simple answer is, no, a fuel processor will not increase mpg. If anything, you give up a few for better performance. Now there is so much that goes into fuel millage we will be here all day discussing it. If you are truly concerned solely with mpg then return the bike to stock. Stock air box and filter, stock exhaust. Then track your millage with Fuelly.com. Then you will find what is the best millage for you, and then you can make the analysis of what king of millage you get in different riding conditions. With only 800cc's available, fuel millage varies greatly under different conditions. Generally you get the best millage out of a stock bike, being real gentile with the throttle, not exceeding 65 mph, and generally riding in the lowest rpm range in the highest gear. Also, a DJ drive lowers your rpm's by 14% so it, on a stock bike should be your best setup.

42 city and 50+ on the highway is right in line with what others are getting.

__________________

2005 C50-DJ-SE-Black

bill825

the bike is stock as far as i know and will replace with stock air filter this year with only owening harleys and hondas before am just learning the c50 going to replace plugs and change out anti freeze also any other ideas on yearly maintance i have missed yes the greese and oil too

desim

Not to cause trouble but had an 08 that was completely stock. I got mid 50's riding two up mostly. You can look up threads and the mpg will vary with bikes of same year. However MOST of the time the stock bikes get the best mpg and if yours is stock it should be getting at least upper 40's. Assuming of course you are driving as james stated above, easy and 65 or less.
Oh yea most of us get a little better with real gas.

Edit: of course 10k you are due a valve check.???

__________________
CB350, TS400, Rebel, GS750, suzuki 650 savage, 2008 Blue & Silver C50 sold, 2007 Silver Ghost Flames C50C
Any married man should forget his mistakes, there's no use in two people remembering the same thing

10-64

OK, OK ........... I know that this has been "beaten to death" on this site, however, I'm thinking of changing my exhaust from stock, to either a V&H Staggered Short, a Hard Krome Res Tec, or possibly Cobra.

I have a 2010 C50T, "stock".

My question: Do I need a "fuel processor", and if so, which is better ....... G-Man, or Bully?

Sorry to bring this up again, but I know there are better informed riders out there, on this site, than I will ever profess to be!

__________________
After Monday & Tuesday even the rest of the week says W T F

desim

Well get the popcorn out

More knowledgeable will chime in but everything I have read here said that yes you need to add processor AND intake.

Ok shutting up and going to my corner.

__________________
CB350, TS400, Rebel, GS750, suzuki 650 savage, 2008 Blue & Silver C50 sold, 2007 Silver Ghost Flames C50C
Any married man should forget his mistakes, there's no use in two people remembering the same thing

jrygrn

Nobody tend to agree with me so ill just shut up.

__________________
2007 M-Bobb; Iso grips and kury pegs,PC III USB, V & H Straight Shots, Naked Jugs, Like 250 Blue LEDS, Front LED Turn signal Mod And Relocation, Side Mount Plate, Flame Grill with Spikes, Switchblade Windshield with Spikes, Brake Light Modulator, 12v Power Outlet, Quiet Kore Baffles, Air horn, Dual head lights, Johns forward controls, Webslinger speedo.

wiseguydave

Actually, the prevailing wisdom among most of us who have been there done that is a fuel processor is only needed if you change the INTAKE. The C50 processor will adjust to the little change the exhaust will make. Mine always ran fine and strong with the stock processor. I added the processor when I changed the intake.

__________________
Some men think they are God's gift to women...not me...I think women are God's gift to ME...

My Gallery

JamesPA

Dave is right. That has been the prevailing wisdom around here for years. It's my belief that we should modify that thinking a little.

What the c50, and all gas engine are trying to achieve is a fuel to air ratio of 14.7 to 1 in the combustion chamber. Any mixture less than 14.7 to 1 is considered to be a rich mixture, and any more than 14.7 to 1 is a lean mixture. When you change the exhaust to a more free flowing exhaust you do allow more air to flow into the combustion chamber because there is less back pressure. What we are hoping for is that the computer can compensate for that change. The problem is that the way a computer compensates is by the use of the Oxygen sensors in the exhaust. Only the 2009's and newer have this sensor, so the older models have a more difficult time compensating.
A fuel processor is a more powerful computer that knows to adjust a larger margin because of the change in either exhaust, air intake, or both. What I conclude from this is that although you might not need a processor for just an exhaust change, it can't hurt. Of course, it is necessary for any air intake change.

Also, any additives in the fuel will reduce the fuel air mixtue and further lean out the engine. So, fuels that have ethanol and other additives including detergents are already a strain on that 14.7% ideal mixture.

So for those who say, "hay my bikes fan never turns", or "I'm getting poor gas millage", or both, are probable running to rich. And for those who say the oppsite are running to lean. That's why it is very important to keep up with the valve adjustments on this bike. Because there is so little room for error with our engine design you need to keep the things you can control under control.

__________________

2005 C50-DJ-SE-Black

wiseguydave

Good point, James. Not sure why, but with all the pipe and intake combinations I had over the years I always was within a mile or 2 of 46 mpg. When I changed the intake, I put the simple Cobra processor on and it has served me well.

__________________
Some men think they are God's gift to women...not me...I think women are God's gift to ME...

My Gallery