Quantcast
Jump to content

Recommended Posts

Posted

I think it is all a matter of what is important to you personally. Carbs are less costly and easier to repair, and jetting is usually cheaper than having your ECU re-mapped or buying a fuel programmer. On the other hand, FI provides much better throttle response, if you have a fuel controller, you don't have to take your carb apart every time you want to change your fuel settings, you just push buttons. No need to re-jet for elevation changes. Performance wise, fuel injection is much better. If you want reliability, with no electronic crap to worry about, maybe you prefer a carb. I quads with both, and I prefer the FI myself, but I am frightened of the day that it start giving me trouble. I think if that fuel injected 4 stroke becomes too troublesome, I will throw a 250R motor with a bigbore cylinder in there. No more battery, no more vavles to adjust, just simple two stroke power, and cheap to rebuild.

Posted
I`m stickin with my Carb model Becides my quad has no battrey to power FI :biggrin:Its still requires kicking it over :yes:

Gotta love old school:wink:

I like them both, both have their advantages.:yes:

Posted
If I'm right, i could be wrong. But anything after year 2004 is FI. ? That is when alot of comanies made the switch.

I think it was later than that !! I think Suzuki was 06 ? Yami was 08 or 09 at least the 450

Not sure about the raptor 700s

Posted

Yamaha went to FI on the Raptor when they introduced the 700, the 660 had a funky two carb setup. The YFZ went to FI on '09 I believe, and the DS, KFX and LT-R have always been FI since their debut. Alot of utility machines started using FI a few years earlier, but I think it started really catching on around '06. Even the bikes are going FI, now that they finally figured out how to run FI without a battery. Polaris, KTM and Honda sport quads still use carbs.

Posted

Like others have said they both have their advantages and disadvantages. Carbs have been around longer and if you're racing you can fix it easily in the pits. FI is still relatively new to quads and they're pretty much based off of 80's technology to make them simple off the show room floor. But with running motor starts I've seen the opposite as bot most of the fi get off the line faster cause the snappier throttle response. But with that $300 part to make FI work properly and make it what people expect, I bet a FI has the potential of beating a carb quad from a dead engine start. In the end it boils down to what you're comfortable with and what you wanna learn.

Posted
Yamaha went to FI on the Raptor when they introduced the 700, the 660 had a funky two carb setup. The YFZ went to FI on '09 I believe, and the DS, KFX and LT-R have always been FI since their debut. Alot of utility machines started using FI a few years earlier, but I think it started really catching on around '06. Even the bikes are going FI, now that they finally figured out how to run FI without a battery. Polaris, KTM and Honda sport quads still use carbs.

To help add to your list if my memory is correct Honda's Rincon and Rancher got FI in 07, I can't remember when the foreman got fi but the foreman was one of the first quads to get power steering. Kawie didn't have fi until they released the 450 in april of 07. The KFX400 and 700 are carb, the brute force 750 got fi in 08. The brute force 650SRA and 650I are still carbed. the LT-R got their fi in 07 or 06 not sure on that one, but I know the early lt400s had kawie 400 engines in them.

Posted
DD is correct except for the larger polaris'. the 550 ho and up are all fuel injected now from 2008 and newer.

I was specifically talking about sport quads when I mentioned that Polaris uses a carb. I am aware that they are running FI on alot of thier larger machines. In fact, most large displacement engines in anything are using FI now.

Posted
To help add to your list if my memory is correct Honda's Rincon and Rancher got FI in 07, I can't remember when the foreman got fi but the foreman was one of the first quads to get power steering. Kawie didn't have fi until they released the 450 in april of 07. The KFX400 and 700 are carb, the brute force 750 got fi in 08. The brute force 650SRA and 650I are still carbed. the LT-R got their fi in 07 or 06 not sure on that one, but I know the early lt400s had kawie 400 engines in them.

The LT-R was FI from the get go in '06. I thought it was the Kawasaki that had a Suzuki motor in it, the LTZ 400 was introduced first, then the KFX 400 and DVX 400 came later, they were basically clones of the Suzuki, which is ,BTW, FI now too. I know that alot of Artic Cat machines use Suzuki motors, even their snomobiles use Suzuki motors.

  • 9 months later...
Posted

I like EFI better. My racecar had a 1050 dominator on it and the guy who built the engine would always be fiddling with it between races. I couldnt hear nor tell the difference but he would swear to me something was off or spot on (he was very professional and friendly and always gave me advice).

Fast forward next season and a conversion to EFI. with a laptop i was able to set my fuel curves to track conditions. Very easy for me.

To me adjusting carbs is an artform. To get them perfect requires a good ear and a certain knack. EFI on the other hand is set and forget. A + B always equalled C.

Sent from my SGH-T959V using Tapatalk

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Forum Topics

    • By kawasig
      Hello All
      I'm kinda new to ATVs. I just bought a 1987 Suzuki quad runner 230 Dual Range. I'm having a problem finding info on it. It's very clean, only 2.800 miles. The front wheels are only 30 in.center to center. I was thinking about adding wheel spacers to give it more stability. I realize the added stress on ball joints and bearings. I'm wondering if there are any other concerns? Any input is greatly appreciated!
    • By Dumass
      My name says it all. I have a '03 Honda Sporttrax 400EX with a new aftermarket carb on it that seems to be having issues. I can start it but it idles really rough and when I give it throttle it just kills the engine. I have tried adjusting the idle screw but to no avail. I am in the San Diego Ca area. 
      Any advice will be greatly appreciated. I would also like to get an owners manual for the thing too but can't seem to find a downloadable one.
    • By Trent Finnessey
      So I’ve got a 2000 Honda 400ex absolutely love it!! I’ve had it for about a month, I ride with bruteforce 750’s, outlander 850’s and 1000 sxs’s and I was thinking of getting a trx450r carb and a full hmf exhaust. And probably doing the air box mod too, how much power would this give my 400? Just a little different or a big difference? Cuz if it’s not much of a different I’ll just stick with my dg slip on..... thanks!
    • By DPDISXR4Ti
      I hadn't driven my Kodiak for a two months, and since it was low on fuel, the first thing I did was filled it up to maybe 7/8 full. Getting ready to start it, I rotated the fuel selector switch to "on" and within seconds I smelled and saw fuel dripping onto the floor. I quickly turned it off and the fuel gradually stopped - I can repeat this.
      The fuel is flowing from the hose that is connected to the bottom of the carb, and routes around to the left side toward the wheel well. Any idea what's going on here? It ran fine the last time I had it out.
      Thanks...
    • By jhamrick75
      If anyone is having issues with the Mikuni VM24SS carb, I thought I would post what issues I had and how I resolved them.
      Acquired a 93 Bayou 220 that had sat for over 4 years.
      The carb was extremely corroded and pitted and full of leftover fuel.
      Cleaned carb and bowl and was able to get the engine to start.
      Within 30 seconds exhaust would heat up and start to glow red hot.
      Removed carb and recleaned everything, including a second overnight soak.
      Needless to say, after removing the carb for the 5th time and my frustration to the limit I
      realized that my attention had been to the carb body and not to the bowl.
      There is a small brass rod on the bottom of the carb that goes down into the float bowl but is seperated from the main section. I had cleaned that area very well....I had thought.
      ***The corrosion had sealed off the channel that runs from the main bowl section to the small tube section on the side of the float bowl. No amount of carb cleaner was going to get it to budge. So i took a small nail and started to scrape away the corrosion and was eventually able to dislodge enought of the corrosion that carb cleaner would flow through that channel. ***
      I thoroughly cleaned each side of the channel in the float bowl and reinstalled the carb and now the issue of it running lean is gone.
      On a second note the fuel mixture screw was a nightmare to remove as the threads had been corroded and wouldnt let the screw come out. I used a little cutting oil and worked the mixture screw in and out until I was able to push past the corroded threads and completely remove the needle. After a couple passes with a tap to clean the threads it is like new again.
      Hope this helps if you are having a lean running machine.
×
×
  • Create New...