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Fuel Injection for GS Series Bikes?????

  • Thread starter Thread starter Anonymous
  • Start date Start date
Yeah....we're back on track. Thanks Karl, Rufus and Saaz for dragging this thing back where it belongs. Although the diversion made for some pretty interesting and funny stuff. For those interested, check out the spin off post..."Go Away Nick". That one really has some fun and bizarre stuff.

BTW......my original question regarding fuel injection possibilities had to do with the potential for reducing the carb rebuilds and synchs that are pretty much required every two years or so. And the nasty propensity of these GS's to suck excess air either around the air box (the doors especially) or thru cracked rubber boots and causing them to run lean and hot.

I wasn't interested in any more speed. The way I see it, crashing at 115 (or so) isn't any different than crashing at 128 with more speed.

I was just (and still am) looking for a simpler easier way.

Keep the posts coming y'all. This is good stuff
 
I am with you on your goal Glenn. I am not taking sides at all but have to say this. If your desired goal is something easier then I am just about positive that this fuel injection idea is not what you want to try. I imagine it turning out to be quite the opposite of what you want.

If you have as many issues with the need for constant carb rebuilds and breathing in air where it is not supposed to making it lean out I would suggest simply buying new quality components and go that route. The reason I say that is because in the 12+ years I have owned my GS I had to rebuild the carbs one time when I first got it. Annual setup is always a plus but I could go several years without a sync job as well and she is always running strong. During this time I have never had an issue with a leaking carb boot or any other component that caused the unwanted air intake you mention although I am aware that it happens to ppl.

I am just thinking that getting it done right with good parts should give you the desired affect. Once setup correctly with good parts you just ride man :)

Not to poo poo the fuel injection idea, just think IMHO that it would give you the opposite end of your desired goal.

Rock on! :)
 
Craig said:
Some people like to"fix" their bikes. Most people that do, have a far better understanding of how things work and what to do when they break down. Those that just "ride" will be the ones sitting at the side of the road with their head in their hands, and their bike not running, with no idea where to begin. As far a modifications go, to each his own. If it wasn't for creative thinking, we would still be chewing on raw meat huddled around a fire in a dark cave. Lets be positive
Click to expand...

Now that is the most inspiring message of the day. As a "Tinkerer" I totally agree. When my friends bikes break all they can do is call a tow truck. I whip out my tools and fix whatever I need right on the side of the road.

Dm of mD
 
Fool Injection

Fool Injection

Having owned a injected Kawa, I can say first hand that it was about the equvailent of the the old VW fuel injection, every body makes it sound like its no sweat to putting it on, just the recirculating system that is involed with fuel delivery is a feat in its self. me I would go with a belt drivin 4-71 GMC blower and a 4500 dominator holly carb, hang it off of one side and put a wheel on it for sharp turns, so you dont scrape it on the ground, I own two british bikes so yes I have to work on them, if I want to ride a classic vibrator, my wife sure likes them!!!!! My GS1000 is a blast to ride, and easy to work on!!! And I have gotten a ton of info from this site thanks guys
 
multiple throttle valves injection or carbs will still need syncing from time to time as things wear or injecters get dirty.
 
Even the most modern FI bikes get criticism for jerky throttle response, even with a bucketload of sensors and the R&D department of, say, Honda to solve the problems.
As has been said, the best compliment fo FI seems to be: "It feels just like carbs".
If it was so easy that an amateur could do it in their garage, why do all the major bike makers struggle?
If you've got leaky carb boots, get new carb boots.
My GS1000 carbs have been rebuilt once in 20 odd years, and get balanced (30 minutes work) every 3 years or so.

That said, if you can come up with a system that offers some advantages (and no disadvantages) over carbs for $300, I'll have one!

Good luck! :wink:
 
Would be interesting...

Alot of people look at what happened with the carb -> EFI transition on cars (Take an old Camaro with the stock QuadraJet vs a newer model with TPI or SFI. Big difference (on essentially the same engine)...), and think 'Why not my bike'?

EFI is complicated, but if guys are willing to play with custom CAR EFI programs, should be doable for a bike... Of course, it will take an equal knowledge of computer programming as well as mechanical aptitude, and you'll probably want a TBI type system, but...
 
Carbs are nice. Especially CV carbs, they dull out throttle responce slightly as to make little changes come slower. (this is why dirtbikes don't generally use CV carbs) The big bike mfgs are immating this behavior with a seccond set of throttles on efi bikes that are servo controled. These provide the dampening.

Dashpots could do the same thing... They did that on brittish cars.

With the efi332 and projects like that you could easily add a servo output to smooth out throttle responce. Or if you wanted to get really kinky you could just run the throttle cable to a rheostat, and use a PIC chip to dampen interpret the analog input, and then output to a servo. And that would allow for smooth throttle responce. And by reading the pic output, instead of the rehostat (analog) input programming the efi would be dead simple.

The biggest advantage I can see with efi is the garunteed start in the morning. No fiddling with a choke, no worries about the petcock positiion. And no need to tweak jetting for altitude or temprature, or humidity.

And potentially 10% more horsepower.
 
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