3.10 Gas = How to get most out of 750

[cliff86]

I am wanting to start a discussion on the different ways of adding power and/or gas milage to your bike. I would like to find an optimal way to do both as I am sure most everyone would agree this would be a great thing in these times of extreme gas prices. Give pros and cons to both aftermarket chargers, intakes or whatever you think you would do. For this discussions sake lets keep the cost reasonable, but reasonable is an opinion so just add up the cost of your idea or concept and include it in your post. If this goes well we can see who can get the most of both categories for the least, or maybe just who can get the most period. Also if you are making multiple changes to the engine, is it possible to do what you are describing in stages. Have some fun with this. Later, look forward to hearing what you have.

[Mr.Sinister]

Ask the guys at the Sissy bar for gas money . :happy: I am just messing with ya .Great idea for a thread . And only your third post ?

[cryin'wolf]

There are 2 schools of thought on this. 1 is to increase the volumetric effiency of the engine so that you can get more power from the air/fuel going in. The other is 2
reduce the actual fuel consumption.

My goal would be to reduce the actual fuel consumption to keep me away from the gas pump. Then use the basic mods to increase the volumetric efficiency, so the out put would not drop excessively.

If you have already changed your intake and pipes the volumetric efficiency has increased, mandating that you change the jets in your carbs. Think of an engine as an air pump, where volume output = input, this is not true, but it is the easiest description for most to understand.

If you have added pipes to your scoot and didn't rejet the carbs, pull the baffles out and you will find that the engine will be able to expell exhaust faster than an intake charge can be supplied, and will run poorly. This is because the volumeteric efficiency has increased, now requiring more air and fuel.

The first mod to do inorder to achieve better fuel efficiency is to jet your carbs according to your scoots setup, i.e. pipes and air intake, then riding conditions and environment. I suggest using the stock needles, and buying a bunch of kehin main jets and trying different sizes, it is possible to over jet the mains and achieve better efficiency, by simply not opening the throttle as much as you are accustom to during off idle acceleration. The key to cutting down actual consumption is by cutting fuel converted to work losses. Seting up the idle circuit is key because the fuel used at idle is not being used for useful work, so I count this as a parasitic loss of potential energy. If you put on Cobra 2" drag pipes, removed the baffles, and only change the main jets upto 105's / 110's depending on elevation etc. free up the intake by removing the intake horn and trim the housing enough to match a K&N filter, jet the idle circuit with a # 38 - # 40 and use the mixture screws to compensate. You can back the screws out 3 1/2 turns, but you must fill the recess with RTV or they will vibrate out. Synchronize the carbs Honda say it doesn't need to be done because they share a manifold, but it will make a difference, also lower the idle to 750 to 850 RPM's, remember less idle revolutions = less fuel wasted.

If you live in hot, congested areas you will want to stop using engine coolant, and use distilled water with a lubricating aditive instead. Lean idle will increase operating temperature.

advance or retard your ignition timing 2 to 4 degrees, depending your specific riding conditions. If you ride mostly open highway commute 70 - 80 mph, you would want to advance your timing so that the burn starts sooner allowing more of the fuel entering the engine at higher RPM's to be burned completely, converting it into work. Conversly if you ride in low speed traffic, you might want to retard your timing to allow the air/fuel charge to help cool the cylinder.

Mod's like roller rockers, are costly but will cut down internal operating parasitc losses.

Another should be routine, but I state just incase, maintain proper tire pressure.
Also, remove the heavy lead vibration dampeners from the handle bars, if you still have them. There is no need to transport unnecessary weight. :wink_2:

[RustyJake]

we're at around $4.425/US gal right now. (1.169/litre).
One of the simplest mods would be to change your riding habits. Accellerating fast and braking hard are two big wastes of fuel. Driving aggressively also consumes more fuel, as well as driving fast. It's hard not to 'use' the bike, but if you want to save some on gas might be wise to look at how you ride the bike.
I know for me, I do mainly highway driving, changing the rear sprocket and the lartger diameter rear tire have greatly reduced the RPM's at highway speeds. But I still find that I get better fuel milage overall if I keep to around 60 mph.

[Mr.Sinister]

Don't ask me . I roll it like I stole it . It is my little hot rod . I did not buy it because it is cheap on gas .

[cryin'wolf]

Same here, but I guess that's why it's broken. :crazy3:

[SpiritofNY]

Is it me or does my bike drink gas like Nick Nolte at happy hour! I find that I have to refill every 95 to 100 miles. Is this normal? i have 2" Cobra slashcuts (no baffles) and the bike was rejetted (stage one kit). Seems like i am burning too much petrol.

[RAZOR]

Is it me or does my bike drink gas like Nick Nolte at happy hour! I find that I have to refill every 95 to 100 miles. Is this normal? i have 2" Cobra slashcuts (no baffles) and the bike was rejetted (stage one kit). Seems like i am burning too much petrol.
THATS ABOUT NORMAL--I WOULD SAY--
RIGHT ABOUT AROUND THE SAME AS MINE.

[Mr.Sinister]

Did I scare that guy away? It must have been the part about 3 posts.:grin:

[Shadowflame]

My ride gets about 48 mpg with a holesaw mod, windshield, riding 73 miles round trip daily to work, mostly at 70 mph.

[bigarmzz]

i always wandered why the hell i had to refill at around 100 miles or so...

looks like if you get a tank extension, that there'd be a way to gain some fuel volume somehow....

100 miles just dont cut it:no:

[SpiritofNY]

Yeah, its areal pain in the ass. I ride 47 miles each way to work and I have to fill it every day.

[gargoyle74]

Crusing between 80-100kms an hour i get about 200 kms to a tank of fuel. All i have done is a vance & hines exhaust. I want to change the gearing for hwy crusing, to see if i can get better mileage also.

[Wild Coyote]

I have Burbs and stage 1 jet kit. I ride it hard, just because I love the bark of my pipes. I get between 100-120 miles before I need to hit the reserve. Any poker run you do is about 100 miles or less, so that's plenty for me. That's the worst when you are doing one of those runs and you need to pull out of the parade of bikes to gas up!!!

[bigarmzz]

if someone just designed a stretch tank that just wasnt comsmetic, but actually has a larger fuel capacity......

theyd do "very" well

someone needs to do this:thumbsup: ....theres a very high demand for more fuel capacity on these bikes

[pegscraper]

If you increase your mileage by 5%, and it costs you $300 to do it, how long will it take you to recover your investment? Prolly not worth it. Get a scooter!

[Mr.Sinister]

if someone just designed a stretch tank that just wasnt comsmetic, but actually has a larger fuel capacity......

theyd do "very" well

someone needs to do this:thumbsup: ....theres a very high demand for more fuel capacity on these bikes
Buy some HD fatbobs. iT WOULD GIVE YOU A MASSAVE LOOK.

[RAZOR]

Buy some HD fatbobs. iT WOULD GIVE YOU A MASSAVE LOOK.
:freak: what are those???

[Mr.Sinister]

Instead of 3.2 gallons you could have 6.5 or 7 gallons. Harly Davidson fat bob tanks. Buy them unfinished for $200 from J&P. Weld a piece of steel between them and mount your old speedo. It could be done on the cheap if you have the know how and the tools. You would prolly have to drill your frame to mount.

[Mr.Sinister]

http://www.jpcycles.com/productgroup.aspx?GID=4CB23C2E-2C17-45D8-8A0A-B9D9FE5EC042 Like so.

[pegscraper]

OK, so then you carry more fuel= more weight= less mpg.....hmmmm Buy a scooter

[RAZOR]

That Tank Would Look Good On Our Bike.
TINY LET ME BORROW SOME MONEY.

[Mr.Sinister]

OK, so then you carry more fuel= more weight= less mpg.....hmmmm Buy a scooter
3 more gallons? More weight? The difference between our weight would be about the same or less. I would build a setup for somone if there was money in it. If it costs more than $200 bucks most would not buy it. $50 to $150 bucks at a time and nobody blinks. You get beond that and everybody gets a little squirlly.

[RAZOR]

3 more gallons? More weight? The difference between our weight would be about the same or less. I would build a setup for somone if there was money in it. If it costs more than $200 bucks most would not buy it. $50 to $150 bucks at a time and nobody blinks. You get beond that and everybody gets a little squirlly.
SHIT - I GET SQUIRLLY AT $50--IF I HAD $50.

[pegscraper]

3 more gallons? More weight? The difference between our weight would be about the same or less. I would build a setup for somone if there was money in it. If it costs more than $200 bucks most would not buy it. $50 to $150 bucks at a time and nobody blinks. You get beond that and everybody gets a little squirlly.

So you think that you on a bike and me on the same bike would get the same mileage? Or someone like Purp compared to Tiny? Big difference. Prolly as much difference as this entire discussion is trying to improve! All of this won't improve the mileage. Bigger tank will hurt mileage but you won't have to fill up as often.

[Mr.Sinister]

You are right it would hurt it a little. A windshield would hurt it more. A 300lbs man vrs a 145lbs man would make a difference too. You would prolly ad 30 lbs and a little wind resistance. You would be able to ride almost twice as far and you bike would have a more massive look. You are testy this mornin.:bomb:

[RAZOR]

So you think that you on a bike and me on the same bike would get the same mileage? Or someone like Purp compared to Tiny? Big difference. Prolly as much difference as this entire discussion is trying to improve! All of this won't improve the mileage. Bigger tank will hurt mileage but you won't have to fill up as often.
I think what SIN is trying to say is,our body wieght will fluctuate 3-4 lbs
and does that make a difference in our gas milage,it has'nt mine.

[pegscraper]

You are right it would hurt it a little. A windshield would hurt it more. A 300lbs man vrs a 145lbs man would make a difference too. You would prolly ad 30 lbs and a little wind resistance. You would be able to ride almost twice as far and you bike would have a more massive look. You are testy this mornin.:bomb:

I am a little testies this morning...... Just pointing out the facts reguarding mileage. Could you get anything that big between your legs with you Johnson there too?:laugh4: I personally need to stop every 100 or so miles to stretch my legs. As for the mileage issue, I don't see how a couple mpg one way or the other is going to make much difference. Go buy a scooter!?:wink_2:

[pegscraper]

I think what SIN is trying to say is,our body wieght will fluctuate 3-4 lbs
and does that make a difference in our gas milage,it has'nt mine.

25 lbs will make a difference. Some have said to take the bar end weights off to get better mileage...... It does make a difference to some extent. Over the long haul. Is a $300 mod worth it for fuel savings?

[Mr.Sinister]

Mine will change by as much a 50lbs in a 4 month period. My piont is that I weigh more than some and less than others. The difference being only 30 pounds one way or the other is not that much. My best friend is 300lbs and his ACE gets close to the same milege as my bike when I am at my lowest weight [ 190lbs] .

[RAZOR]

25 lbs will make a difference. Some have said to take the bar end weights off to get better mileage...... It does make a difference to some extent. Over the long haul. Is a $300 mod worth it for fuel savings?
I WOULD'NT PAY $300 DOLLARS FOR IT---TINY IS GOING TO.

[Mr.Sinister]

I am not saying that it will save any money. Only that you will fill up less. Buy your self a scooterpie.:heh_heh:

[RAZOR]

If You Want Better Gas Milage--buy A Bmw Or Somthing Like That.

[pegscraper]

Mine will change by as much a 50lbs in a 4 month period. My piont is that I weigh more than some and less than others. The difference being only 30 pounds one way or the other is not that much. My best friend is 300lbs and his ACE gets close to the same milege as my bike when I am at my lowest weight [ 190lbs] .

I eat beans and the added thrust helps me get better mileage!

[RAZOR]

I eat beans and the added thrust helps me get better mileage!
THAT WOULD MAKE WHOEVER IS BEHIND YOU EXHAUSTED.

[Shadowflame]

OMG, some of the shit you guys come up with,, beans,, exhausted, jeez. My bike as of today, after doing the drilling out of the resonators, drilling the baffles out, and retacking the resonators back in to take out some of the volume of sound, has now let my bike achieve 51 mpg. Has anyone else taken everything out of their mufflers and replaced the resonators like this? I still have the deep sound, it just isn't quite as loud, but still pretty loud.

[HaChayalBoded]

The tank from a Valkyrie should be a simple conversion mod. It's been done numerous times on Magnas and shadows and those have a 6 gallon capacity.

[lobird91]

Hi guys thought this would be a good thread for my first post. I just bought a 06 SS750 and so far my best MPG all stock has been 55. I also am looking for ways to improve the fuel milage of this bike...how much will going from the 42 tooth rear sprocket to say a 39 make in milage.

Alan

[HaChayalBoded]

IF your getting 55 a gallon, your on the high end, don't complain, the 39 tooth would get you better highway mileage but if your the time to make up for lost torque by giving it more gas around town you just took away anything you gained on the highway. But if you take it easy and you just cruise, the 39 would probably increase your mileage a bit, but not enough for you to really notice