i agree with that. U need to let them both warm up. But like stated its old technology its time to go. Just like 2 strokes vs 4 strokes, 2 strokes are old and on the way out. Except snowmobiles!! long live the 2 stroke snowmobile!!!!!

 

Don't forget outboard boat engines. They simply developed clean 2-strokes that the EPA accepted and you still have all the benefits of a 2 stroke. The thing about 2-strokes is that they are very, very forgiving (aside from carbs) and have so many fewer moving parts among other benefits.
This whole carb vs EFI discussion started a long time ago in boats given they had early EFI back in the 1990's with the upgraded MPI coming in 2002. As mentioned earlier the EPA made the decision for you when they outlawed carbs and then also forced the use of catalytic converters as well a few years ago on new i/o's.

 

Don't be surprised if the EPA kills the 2 stroke in the not to distant future, even in sleds. the two stroke is a dying bread. I wont be surprised if we don't see 4 stroke chainsaws, weed eaters, and leaf blowers soon.

 

Yea I know. Its gonna suck for sleds. Hope they get a 4 stroke sled to performe as good as a 2 stroke before that happens

 

[/quote]

I just want one that is EZ to work on, is reliable, gets the job done, and doesn't cost too much.

My main concern is the Pro-star EFI motor going to have the longevity of the old school Fuji carb engine?.[/QUOTE]


So just to add to a couple of your points there, everyone wants a machine that's easy to work on, reliable, gets the job done and doesn't cost too much. That machine doesn't exist lol. If it did, it would either put all competitors out of business or the business that made it out of business. The 570 appears to be a great all around machine and based on your objectives, it appears it would meet your expectations but it's only you that can make that decision.

As far as the engine, like you mentioned, it's been in the RZR for sometime now and will be the engine of choice for polaris, that's why it's in the ranger and sportsman now. Obviously it must be worthy for them to promote it in all their machine types.

But good on you to do your research and ask these questions. I think you'll find the more you find out though, the more questions you'll have! Lol


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well said.

:top::fing02: SLEDDER1 QUOTE:
So just to add to a couple of your points there, everyone wants a machine that's easy to work on, reliable, gets the job done and doesn't cost too much. That machine doesn't exist lol. If it did, it would either put all competitors out of business or the business that made it out of business.

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Ur probably right. I'm searching for an ATV that doesn't exist. The DREAM bike! LOL. Well I'll settle for one with less headaches. I think Polaris has some great machines, albeit some designs need some tweaking. One thing I have found is my older model Polaris, although not perfect, is relatively easy to work on. My friend's Honda Rancher is a PITA. Granted his Honda rarely needs fixing but when it does he's in for a treat. One advantage of buying a "popular" model bike is there is a ton of support online and after market parts for it. My first ATV I bought was a 1998 Yamaha Big Bear 4x2 which apparently they only ran that style for a few years so finding parts for it is a pain. Thanks again for all the advice guys. Now I just gotta hit a dealer for some test rides.

 

That was one of the reasons I opted for the 570efi. If it is good enough to go in a $10k plus razor... and they keep using it, it must be a pretty good motor.

 

I have owned both. Several in fact carbureted units, Honda XR100 4 stroke, Eton 50cc 2 stroke atv, Yamaha 50cc 2 stroke pee wee dirtbike, Kawasaki 220 bayou atv and a 250 bayou atv, now my Polaris 04 400 carb, my 08 500 EFI, 06 800 EFI, and an 07 450 HO. Now that all that has been said, the experience with the EFI units is admittedly, short so far, but, I can say without hesitation, I ALWAYS had "seasonal start up" issues when bringing the Carbed units out for the spring. No start, stalling, plugged idle circuts, you name it, I have lived it. Admittedly, I was not always judicious with fuel treatment, my own fault.
I took my "new to me" 08 500 Sportsman EFI riding with my Grandsons, who happened to be riding my Cousins 04 (late model) 400 Sportsman, and his 11 400 HO Sportsman. At the end of the day, even with the extra CCs and power, I used the same amount of fuel +- .1 gallon or so with the 500 EFI as with the carbed 400s.
I trailered the 500 home on an open trailer, from Princeton WV to Newark, DE in November, 2013. Backed into the driveway, my Son climbed on it and I told him "don't touch anything, just turn the key". It cranked about 3 or 4 times and started and idled. His eyes got as big as "saucers". "WOW" he said, "this fuel injection is THE S**T"!!
As far as plug fouling, I haven't inspected the plugs on the 500 EFI yet, but I have done some pre season maintenance on the 06 800 EFI I just picked up used. To say the least, the guy I got it from was not real big on maint. I pulled the plugs and they looked like they should have been thrown away a year ago. To be fair, I have started and idled it, backed it out of a garage, put it on a trailer, backed it off the trailer, putted around a very little bit, etc. We all (should) know, the EFI richens the mixture for easy starting and idling so, to me, it makes sense that with the short hops, idling, etc that the plugs would look dirty and fouled.
If you are still reading this, thank you!!
My last point: as stated earlier, the auto industry went through all variations of EFI to make better power, better economy, etc, so, to me it is a NO BRAINER to embrace the EFI systems. They get more power from less cubic inches with better emissions, better mileage, etc, you name it. I think it is somewhat true that, the more electronic gizmos they build in, the more things can go wrong, and the more $$ it may cost in the SHORT RUN. If anyone on this forum has EVER been left stranded by an EFI Polaris, please, let us know.
I will gladly live with my carbed machines for now, and happily so, even with their quirks. (I am also making better use of the available additives!) Eventually, I will probably have all EFI machines.
For the record: I did NOT hesitate to pick up EITHER EFI machine. Snapped them right up as soon as I got my funding together.

 

EFI is the way to go, just my .02

 

As much as Carbs are inferior in 9 out of 10 ways, they will still be and continue to be the choice in less than first world countries because the gas in those countries is less than quality. When a carb get clogged, they clean them, when part of the EFI system breaks, they can't get parts. You learn that if you vacation there and rent any powersports.

 

As much as Carbs are inferior in 9 out of 10 ways, they will still be and continue to be the choice in less than first world countries

Like Canada!

Just kidding, could not resist.

 

This is a good thread.Now just suppose you and your FI machine are out on a camping trip miles from anyplace.You load up your camping gear and turn the key and it refuses to start. Suppose a small 4 legged critter decided to chew the wires on your FI machine. With a Carb unit this situation would not likely happen.How many sensors are on a FI machine anyhow? Throttle position sensor, intake temperature sensor, barometric pressure sensor, exhaust gas temperature sensor,not to mention wiring for a fuel pump.A carburetor unit is much simpler and therefore more reliable. It does have a few drawbacks however simplicity is a good thing IMHO, Ken

 

I have raced these type of race cars for 25 years. They use 1200cc motorcycle motors in them and for years they had carbs and were pretty much trouble free. Now with the efi motors they do have lots of problems with sensors and fuel pumps. I'll take the carb unit anytime for that reason. That's why I have two 2012 400's!!


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I had a 1300 cc motorcycle that I traded in on my atv. It was efi. I never had any problems with it starting but when I started going for more performance it was a bitch to tune. I put a high lifter cam in it a hyper charger drag pipes hp fuel pump and a tuner and I tell ya what I'd a gave anything to just throw new jets in it and go! I spent weeks getting all 3 pots set on the tuner to be just right. But I tell you what when all was said and done whoop whoop ! What a blast!!

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For any type of machine that is limited use, carbs show their weaknesses and unforgiving qualities. That said though, I recall the days of my first three cars that were carb and wow what a major pain in the butt when it would get in the double digit negatives here and they weren't in a garage. The fact that carbs don't stop feeding fuel when they aren't starting but are cranking sucks. It was an art to start a car when it was that cold and then to unflood it and not kill the battery.

 

I think the cold weather thing has been hammered into peoples heads to favor efi.

The only reason I say that is I live in one of the coldest windiest climates and have NEVER had any of my carb'd machines not start with the exception of the 1995 Polaris Xplorer 400 I used to have.

My garden tractors are carb, they start no problem to move snow. Both atvs are carb'd never had an issue with either one, All my sleds are carb'd, 2 or 3 pulls and they come to life. I will admit I'm a bit OCD and try to keep everything in tip top shape.

I think jkust hit it on the head. ALOT of people out there don't ride as often as a lot of us do. Carbs don't like that limited use thing, and problems arise. EFI is much more forgiving in that regard

Don't get me wrong I like how easy EFI is to operate and my next machine will have EFI for sure but carbs do still have their benefits.

 

I think the cold weather thing has been hammered into peoples heads to favor efi.


I think jkust hit it on the head. ALOT of people out there don't ride as often as a lot of us do. Carbs don't like that limited use thing, and problems arise. EFI is much more forgiving in that regard

Don't get me wrong I like how easy EFI is to operate and my next machine will have EFI for sure but carbs do still have their benefits.

I view problems in the summer and problems in the winter totally differently. A problem in the summer can be easily dealt with but a problem in the winter when a vehicle isn't in a heated garage is extraordinarily challenging. When removing a glove for a minute to even turn a nut with your fingers means you are a minute from frost bite, small issues are exponentially more difficult. This winter was extra painful because it almost never got above zero and so if you wanted to go out, you were doing it in colder-than-you-ever-normally-would temps.
Plus, even when my carbed machines do start, I still have to babysit them to keep them running while they warm up. I will simultaneously start my efi and my carb (sleds in this example). If the EFI doesn't start on the second pull (the first primes it the second pull starts it) it means the world must be ending they are so amazingly reliable but I do a couple air crosses and say a few hail marrys to start the carb sleds and when they start, it's a lot of babysitting and I can't just walk away back inside the house. That is even with nice, clean and maintained carbs. Plunging the primer just one time too many or having one of my kids or wife attempt to start them can be trouble.

 

I am a die hard fan of carbs, however after converting some of our cars over to EFI, I have now embraced EFI. I dread working on our bikes that have carbs... must be an age thing

I do value what Kenskip1 says, all of which are very true and have a lot of merit. I think about this stuff while 70 miles away from my rig. It will not change my decision to keep with EFI though

 

Own two Sportsman 500 EFI and one Sportsman 500 carb model. Much prefer the EFI. The only reason I picked up the carb model was because the price was very right and I had ridden with the quad and it's owner since the quad was new otherwise the carb feature would deter me. Have had other carbs and much prefer the EFI

 

I do like the throttle response of efi as well. I need another touring bike for my wife and there is a brand new 2013 Touring 500 for crazy cheap which I'm sure would be just fine for her but I've vowed no more carbs no matter the deal.

 

Other than the easily fixed T-BAP connector the Bosch EFI system on my '04.5 700 has been rock solid. This quad has lived outside it's entire life too.

 

Again, for economy, mixing, vaporization, emmissions, the carb is a pig and EFI is King. Mythbusters did a piece on a carbed bike, it actually made MORE emmissions than an EFI car! Think about it the next time you are following a "classic car". The smell coming from the poorly mixed air/fuel being burnt is about nauseating. Carbs are easy but EFI is a bit more green. Again, I cite the 500 EFI using the same amount of fuel as 400 carbed units.
And Kensip1, I would think if that critter chewed that many wires, your ignition circut on a carbed unit may be dead too.....lolol.:hmmm:

 

Well if you want to go down that route,the smell is more likely from valve overlap in the classic car.Emissions? Their are more cleaner burning cars with carbs than you are aware of. Look at the Volkswagon Beetle.35 MPG and then some.You can make a small block chevy get over 25 mpg if you build it properly.Green, are you into the ethanol craze? Do not get me started on that topic.I bet you are an Al Gore fan.Still believe in global warming?I am getting off topic. And yes the squirrel could chew out my wiring. He won't because I have my EPA certified squirrel repellant. Comes from a 9millimeter.

 

I think that was unwarranted and downright rude. (Where are the moderators when you need them?) No I am not kidding. I am definately NOT an Al Gore fan, never believed in global warming and never will. Yes, we could go on and on about tuning and building but for the average person and the average vehicle, it is all mumbo jumbo. I still stand by the carbed bike making more emmissions than an EFI car. You can look it up. My point, plain and simple: EFI is more efficient. It is exactly why modern muscle cars get outstanding mileage and superior performance. Period. It is precisely why manufacturers have embraced it.

 

I think that was unwarranted and downright rude. (Where are the moderators when you need them?) No I am not kidding. I am definately NOT an Al Gore fan, never believed in global warming and never will. Yes, we could go on and on about tuning and building but for the average person and the average vehicle, it is all mumbo jumbo. I still stand by the carbed bike making more emmissions than an EFI car. You can look it up. My point, plain and simple: EFI is more efficient. It is exactly why modern muscle cars get outstanding mileage and superior performance. Period. It is precisely why manufacturers have embraced it.

Sir I may have overstepped my bounds. OOPS! Anyway I do see your point and your are correct.The reason the performance is better with FI is that each cylinder receives the same amount of gas making for smoother performance.Each cylinder is more equal to the others.But for simplistic reasons and my 400 Polaris is a prime example the carb is my choice of the two.

 

I love how passionate people are for carbs or for efi lol.


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Debate is good for the mind and logic is never a waste of time.!!:werd:

 

Sir I may have overstepped my bounds. OOPS! Anyway I do see your point and your are correct.The reason the performance is better with FI is that each cylinder receives the same amount of gas making for smoother performance.Each cylinder is more equal to the others.But for simplistic reasons and my 400 Polaris is a prime example the carb is my choice of the two.[/QUOTE]

Thanks!
Hey, I am the proud owner of an early model 04 400 Sportsman and I just picked up an 07 450HO, both are carbed. I am NOT in a hurry to get rid of either one of them, trust me! We both agree on one other thing: we BOTH own Polaris.
Happy and Safe riding!!

 

800 vs 850 efi

I think I'm sold on the idea of buying a 570 touring bike, BUT what is the point of Polaris selling atvs with such similar engine sizes? The "550 or 570" and there's the "800 or 850"? They are so close in size you'd think they only offer one IMO. The 570 is in the value line which is larger motor than the 550 upgraded model and the 800 is value line as well which is smaller than the 850 upgraded model. I'm baffled by their selection of ATV models. They are all EFI engines. I would guess Polaris is phasing out a few of these I just mentioned.

 

They are all EFI engines.

They may all be EFI but they are a mix of OHV, SOHC and DOHC

 

The 550's days are numbered. And so are the 400's. They are getting rid of every engine that fuji had a hand in.

 

Time for change


Yes I would agree. Polaris will no doubt replace all the tride and true Fuji engines with Prostar motors. I'm all for progress. I hope the Pro-Star motors have the longevity of the Fuji. At some point change must occur. Look at Honda ATVs. They sat on their brand name reputation for years not developing anything ground breaking and now they are no longer top dog in sales. I will give Polaris credit for pushing the envelope. onder: