Suzuki GSXR Forum banner

carb vers fuel injection

7K views 16 replies 9 participants last post by  JCW 
#1 ·
what was the last year for a 750 with a carb i HATE ALL THE COMPLICATED ELECTRONIC BULLSHIT ON BIKES NOW carbs are more simple and I don't care about mpg it's a toy
 
#2 ·
Carburetors are even MORE fiddly than fuel injection. And if you don't know anything about tuning 4 carbs, good luck finding a shop that will even LOOK at it. That being said... The last carbureted GSXR 750 was 1997. They were a sort of hi-bred electronic carburetor...
 
#3 ·
i know how to tune a carb what i dont like is being stranded because of a stupid way over priced piece of electronic shit i like things simple kinda like putting a carbed 318 in my jeep to get rid of the fucking fuel injection and all the worthless sensors that seem to fuckup at the worst possible time
 
#4 ·
I'd choose FI over carbs. They're not that convenient. They suck when it's cold. They need to be warmed up. They're harder to start. Tuning is not easy if you don't know what you're doing, plus if you get it wrong, you have to take it apart again. FI you just plug it in the computer.

You gotta worry about your floats & bowls if parked too long.

I love FI, best thing done to a bike.
 
#5 ·
On a bike or small machine I’d have to agree I like fi better, all around better performance , less maintenance not to mention the ethonal in fuel these days just destroys the smaller carbs blah blah! However on a car or truck I’m old school Id perfer a carb , I can manually tune it with out a computer or lab top and in my opinion it’s just easier.
 
#8 ·
Like was said earlier, it is a toy. I had FI on my 600 and it was nice to just hop on and ride. I had no garage then so tinkering with carbs wouldn't have been convenient. Now that I have a garage I want the wrench time. That, and a naturally aspirated bike sounds a bit different...for some reason the little bit of a howl you get when 4 carbs are sucking as hard as they can makes my man parts tingle.
 
  • Like
Reactions: Winchester Boy
#9 ·
I have 4 carbureted bikes in my garage, along with numerous other carbureted toys. I have tuned them all at one point or another. I am actually pretty good with carbs, been dealing with them since I was a kid. Just getting old, and am ready quit fiddling with them every year. I was an automotive technician for 10 years, and no stranger to computerized fuel injection either. I'm ready to move up to FI on a bike... Looking for an '01-'02 750-1000... I don't sell bikes unless I just don't like them, so the bikes I have will just get a new roommate, lol...

Where are you, and what do you currently ride?
 
#11 ·
Carb vs FI

I have owned both a '92 GSXR 1100 with 4 carbs that I tuned to a T and a '05 GSXR 1000 with FI that ran ok at best. The 1100 would go into 'warp speed' (everything got blurry quick and it felt like your brain was being sucked down to your toes) when you cracked the throttle open and the '05 while it was quick at the beginning (nowhere near blurry though), as it aged, it became slower and 'instant on' power diminished. My mistake, sold the '92 to pay some bills and took the '05 to a local mechanic who burned it up then claimed ignorance when it came time to pay up. The '05 was lighter but you couldn't lay it over as far. The '92 you could drag handlebar ends going around a curve with short bar ends put on it and never question traction. It was something to put your knee against the tank and have to watch how far over you go because you could scrub your leg off. The '05, when it went past about 70 degrees it was loose. The '92 you could lay that thing down on it's side and twist the throttle (to an extent) with confidence it would stick. Course, the D364's on the '92 might have had something to do with that.

The '05 started burning oil around 24,000 miles and it would just shut off after about 30-45 minutes of riding. It didn't overheat but you had to wait about 15 minutes before it would start back up. Not really complaining it was 3 short of the magic 2 one day with about 5500 RPM to go but had to slow down due to conditions.

The new rubber doesn't stick as well. My setup was:
'92 GSXR 1100:
Factory Stage III carb kit (main jet was drilled out to the next size metric drill bit)
EBC O-ring 530 racing chain
40T R, 17T front sprokets
Vance and Hines Powerpak Ignition
Vance and Hines SS2R exhaust system
header wrap to the collector
GSXR 750 swingarm with appropriate bushings to account for gaps in mounting
Pink wire cut (restoring full time to all gears and no timing retard)
foam rubber handgrips

'05 GSXR 1000:
44T R/15T F sprokets
E3 diamond fire spark plugs
ECU re-flashed to remove ignition timing retard and top speed limiter
foam rubber handgrips

Lessons learned: never sell your machines, find a mechanic you can trust.
 

Attachments

#12 ·
Another lesson to learn... Never sell your bikes, and learn to work on them yourself...

I love my '95. Will never get rid of it, if I can help it. I don't sell bikes, unless I don't like them. There will be '00 - '03 750 -1000 in my garage next year. Parked right next to my '95 750, and my '83 750.

Explain "the Pink Wire" for me. Haven't heard anything about that one yet... Does the '95 have it?
 
#14 ·
Another lesson to learn... Never sell your bikes, and learn to work on them yourself...



I love my '95. Will never get rid of it, if I can help it. I don't sell bikes, unless I don't like them. There will be '00 - '03 750 -1000 in my garage next year. Parked right next to my '95 750, and my '83 750.



Explain "the Pink Wire" for me. Haven't heard anything about that one yet... Does the '95 have it?
Some people don't have the garage space.
 
#15 ·
That does pose to be a damper on the plan. I can't afford to have anyone work on my bike, and have huge trust issues with mechanics.

Man, this thread got turned a little from the original post, eh? Back to it then... You can find the old Carb bikes out there. Just be extra cautious, and check them over HARD. If they don't run, they are NOT a classic "survivor". Good luck, and let us know how it goes.

OH, and if I come across anything (not sure where in Michigan you are) I will shoot you a heads up... I'm always hunting.
 
#17 ·
You never quite get a carb perfect. It's always a compromise somewhere. Full throttle, high rpm, part throttle, mid range, idle...

As far as EFI, 2005 you are probably talking about 7 years of mainstream EFI, so maybe still early? I remember my zx-10r. It was a beast on throttle, but not always the smoothest part throttle.

Even these days, it seems you never get the smooth throttle application of a CV carb.

Of course, a CV carb performance wise leaves a lot to be desired.

I currently have a carb'd kz1000, a yamaha xs850 triple with transplanted triumph 900 carbs (this one I completely tuned from scratch). Carbs can be finicky depending on the weather but there is an attractiveness to their simplicity.
 
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top