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Carb vs Fuel Injection

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Motorhate
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PostPosted: 11:45 - 03 Nov 2015    Post subject: Carb vs Fuel Injection Reply with quote

Having ridden bikes with both carbs and with fuel injection I have to wonder if carbs really are worth the hassle? Apart from the sometimes temperamental nature of carbs and their components, fuel management is much better with fuel injection and is less suseptable to changes in climate. Does this mean that manufacturers will eventually stop using carbs altogether and switch to fuel injection systems? Surely emissions must have a bearing on this too. Not sure how the "traditional" manufacturers will go but I noticed that even Harley Davidson have used fuel injection on several of their models now.
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chickenstrip
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PostPosted: 11:57 - 03 Nov 2015    Post subject: Reply with quote

Seems to me you're a bit late to the party with this question. Manufacturers have steadily been switching to FI for some years, and yes, I would think carbs will soon be a thing of the past - we're almost there already.

I've only ever ridden one bike with FI. That was the Kwak 750 Turbo, which came out in 1983. It was absolutely glitch-free, no snatchiness at low revs - but then, they didn't have all the emissions regs to cater for back then.

I don't remember ever having hassle with carbs, but I can't say I have a preference for one or the other. If the bike runs well enough, either will do.
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wr6133
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PostPosted: 12:49 - 03 Nov 2015    Post subject: Reply with quote

Excluding Chinese peds & 125's I think pretty much all mainstream road bikes are FI and have been for a number of years.

Emissions and I wouldn't be surprised if cost factored in, I'd wager an FI system is cheaper than a bank of carbs for manufacturers to produce, setup and assemble.
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Rogerborg
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PostPosted: 13:25 - 03 Nov 2015    Post subject: Reply with quote

This is a really interesting question and also we should all go and see The Matrix when it comes out next year, I hear it's going to be balls-trippingly awesome.
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Motorhate
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PostPosted: 13:41 - 03 Nov 2015    Post subject: Reply with quote

Rogerborg wrote:
This is a really interesting question and also we should all go and see The Matrix when it comes out next year, I hear it's going to be balls-trippingly awesome.


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c-m
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PostPosted: 14:55 - 03 Nov 2015    Post subject: Reply with quote

FI is a century old technology used in mission critical applications.
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redeem ouzzer
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PostPosted: 19:20 - 03 Nov 2015    Post subject: Reply with quote

I've yet to sample a bike FI that matches a dyno tuned carb set up. Also FI is heavy (bigger ECU, lots of wiring), as well as being a cunt to fault find at home.
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Rogerborg
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PostPosted: 19:43 - 03 Nov 2015    Post subject: Reply with quote

GT200Fan79 wrote:
FI is heavy (bigger ECU, lots of wiring)

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Polarbear
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PostPosted: 19:52 - 03 Nov 2015    Post subject: Reply with quote

I doubt if you could pass modern emissions on a carb bike.

Being honest, I'm sure we all smirked at VAG getting caught out in the diesel emissions scandal but to a certain extent that's what some bikes with FI do. The software leans off the bike at emission testing revs so it passes. You couldn't do that with carbs.

I have had both and to be honest, when they are set up correctly I wouldn't know which I am riding from how the bike feels.

I still have a bank of 4 vacuum gauges for setting up the carb balance. That will be gathering dust from now on. Sad
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temeluchus
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PostPosted: 19:54 - 03 Nov 2015    Post subject: Reply with quote

Carbs aren't temperamental, its more owners are lazy, incompetent and tight fisted so the poor things are never maintained properly.
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Kickstart
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PostPosted: 19:56 - 03 Nov 2015    Post subject: Reply with quote

Polarbear wrote:

I still have a bank of 4 vacuum gauges for setting up the carb balance. That will be gathering dust from now on. Sad


Until you need to balance the throttle bodies

All the best

Katy
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Mario_Kempes
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PostPosted: 19:56 - 03 Nov 2015    Post subject: Reply with quote

It's only a matter of time before all bikes are using these disc brakes. They're clearly superior.
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Pete.
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PostPosted: 20:04 - 03 Nov 2015    Post subject: Reply with quote

temeluchus wrote:
Carbs aren't temperamental,


No but they wear out. Fuel injection does too but at a much lower rate and even then it has less of an impact because the FI system doesn't depend on tiny air passages and brass tubes to meter the fuel.
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Polarbear
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PostPosted: 20:06 - 03 Nov 2015    Post subject: Reply with quote

Kickstart wrote:
Polarbear wrote:

I still have a bank of 4 vacuum gauges for setting up the carb balance. That will be gathering dust from now on. Sad


Until you need to balance the throttle bodies

All the best

Katy


Fair point. I have never done that with FI yet. Something new to learn.
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almostthere
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PostPosted: 20:17 - 03 Nov 2015    Post subject: carbs Reply with quote

It all depends on which carbs you've got, can't beat a set of flatslides Very Happy
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Pete.
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PostPosted: 20:31 - 03 Nov 2015    Post subject: Re: carbs Reply with quote

almostthere wrote:
It all depends on which carbs you've got, can't beat a set of flatslides Very Happy
https://i64.tinypic.com/wsqtlu.jpg


In what respect? Flatsides are nothing special, technically or mechanically.
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Slacker24seve...
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PostPosted: 20:34 - 03 Nov 2015    Post subject: Reply with quote

I can get maps for free for my Triumph which I can put on to my bike via a £20 cable and a laptop I already own. Piece of piss.
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Rogerborg
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PostPosted: 21:00 - 03 Nov 2015    Post subject: Reply with quote

Polarbear wrote:
I doubt if you could pass modern emissions on a carb bike.

I'll be astonished if any carbs make it past Euro 4 next year in any capacity.

Not that Dodgy Dan won't keep selling Whang Dong Joypops for a while at least, but I'd expect the Type Approvals will be PaddyCertstm.
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