ATV Connection Magazine

2 stroke for the 4x4.

(Click here to view the original thread with full colors/images)




Pages: 1


Posted by: ottoman

Come on the 2 smoke atv industry is dead. Not tryin to start anything but there is a reason why all of the major manufactures have stopped making them in atvs, yes the evinrude e-tec is very impresive but give it time and bombardier will drop them for 4 strokes also. The way the greenies are attacking anything that makes noise or polution (snowmobiles, atvs, bikes so on and so on) The will eventually get there way. But ya the 2 smoke atvs were fun I had plenty of polaris atvs back in the late 80s and early 90s and really like riding them. There is just something about the smell of a 2 smoke in the morning

Posted by: mudslinginfool

i thought they quit making all 2 stroes. Or they are going to.

Posted by: buckaroo50

Do you think AC will develop a 2 stroke in the 400-500 class for the 4x4's?

Makes sense to me if they did. More power, more effecent, 100 less parts in the engine, less maintainance, lighter. We have the technonogy now to meet EPA emissions.

If they had a 400 2 stroke in a 4x4 I would buy one.

Posted by: buckaroo50

Originally posted by: dynojockey

Personally I am a 2 smoke fan , I have an old 250r I ride the crap out of. But the new four strokes really run and are less maintenance , so who wkows , I think the 2 smoke days are over.


You could be right, but what Evenrude did with the E-tech outboard, is just short of amazing. Evenrude is tied in with Bomardiere (Can-Am), they just may do something with the 2 stroke in a 4x4. If that happens I think it would do more for the industry than what AC did messing with a diesel in a 4x4.

Posted by: buckaroo50

Originally posted by: mudslinginfool

i thought they quit making all 2 stroes. Or they are going to.


I don't know about motorcycles and ATV's but Evinrude has some awsome outboards called the e-tec series going from 40hp to 225hp using 2 stroke motors... I just kind of thought since Evinrude and Bombardiere (Can-AM) are connected that it would be nice to see the 4x4 Utility come with a 2 stroke motor.
Check this link out.
http://www.evinrude.com/en-US/

Posted by: buckaroo50

Originally posted by: Junkman673

I can't imagine that a 2stroke would make a good trail ATV. I used to ride 2 stroke bikes and they were good for racing but not so much for trail or Mountain riding. They just don't have the torque of a 4 stroke. You have to keep a 2 stroke wound up pretty high to make good power.


Not so, I had a 250 Ossa enduro that was a stump puller, the darn thing was like a tractor it had so much low end torque. It is all in the porting, similar to what a camshaft can do for 4-strokes. Actually a 2-stroke would deliver the power more smoothly because if fires on every up-stroke instead of every other up-stroke.

The 2-stroke you are talking about was designed to turn high rpm. If a 4-stroke was setup to turn high rpm then the lower end would suffer also.

Posted by: buckaroo50

I started the topic because I know that technology has advanced quite a bit and Evinrude has some outboards that are awsome. And was wondering if the ATV factories might jump on board and get one for 4x4 Utility. If I was the factory I would think that a high tech 2-stroke would be a good market instead of a diesel.
Evinrude has some great videos as to what they have done with their 2-stroke engines. If you get a chance it is well worth watching.

Posted by: buckaroo50

Originally posted by: ottoman

Come on the 2 smoke atv industry is dead. Not tryin to start anything but there is a reason why all of the major manufactures have stopped making them in atvs, yes the evinrude e-tec is very impresive but give it time and bombardier will drop them for 4 strokes also. The way the greenies are attacking anything that makes noise or polution (snowmobiles, atvs, bikes so on and so on) The will eventually get there way. But ya the 2 smoke atvs were fun I had plenty of polaris atvs back in the late 80s and early 90s and really like riding them. There is just something about the smell of a 2 smoke in the morning


You might be right about the 2-stroke in ATV and motorcycles being dead. I was only wondering if maybe the factories may eventually offer one, since Evinrude has shown that they are actually cleaner burning than a 4-stroke now, lighter, more powerful and less maintenance, and so much easier and less complicated to work on (pop the head slide the jug off put new rings, reassemble - basically now a new motor). I think it would be awsome.

If by chance AC made one in the 400-500 class I definately would be one that would be interested in buying. I would almost bet that since Bombardiere (Can-AM) is tied in with Evinrude that we may see one shortly from them. Heck why not, they sold in the past and they would sell in the future. Especially since now it is a better, lighter, cleaner, more reliable and more powerfull engine. Makes sense to me....

Posted by: buckaroo50

Originally posted by: HR

i thought, well kinda remember soeone telling me that the e-Techs were only 2 stroke because they were a rotery engine.? is this not right? the wankel rotery is a 2 stroke engine.? the one that is in the RX-7 and RX-8. that is how thay get so much RPMs outa them. but i might be wrong about then e-techs/

i love the rotery, 1.6 liter producing 600HP. it's GREAT!!!



HR


A rotary is a rotary (there are no pistons), neither 4 stroke or 2 stroke - and to the best of my knowledge it doesn't mix any oil with the fuel. I guess it's actuall functioning would most closely resemble a 2-stroke - where by it moves past a port to pick up gas, compresses it, fires the fuel, and when the rotor passes another port it allows the burnt gases to exit. Not sure on the intake port if it has a reed valve or what actually goes on there - can't remember.
E-tec motors by Evinrude are 2-stroke - at least that is what Evinrude calls them, and in their videos they show a conventional 2-stroke engine to illustrate the difference between a 2-stroke and 4-stroke.
The only problem with rotaries is that the fuel consumpsion was pretty high. Too bad they couldn't get better gas mileage - I like the rotary concept. Relatively simple, light, powerful, and the physical size is pretty small. I don't know how much they weighted compared to a 4-stoke or 2-stoke. A 2-stroke of equal cc or hp, weighs less and is smaller than a 4-stroke.

Posted by: HR

i thought, well kinda remember soeone telling me that the e-Techs were only 2 stroke because they were a rotery engine.? is this not right? the wankel rotery is a 2 stroke engine.? the one that is in the RX-7 and RX-8. that is how thay get so much RPMs outa them. but i might be wrong about then e-techs/
i love the rotery, 1.6 liter producing 600HP. it's GREAT!!!

HR

Posted by: dynojockey

Personally I am a 2 smoke fan , I have an old 250r I ride the crap out of. But the new four strokes really run and are less maintenance , so who wkows , I think the 2 smoke days are over.

Posted by: dynojockey

Detroit use to make a 2 stoke diesel , it sounded like it was coming a part . ran good though. as far as the diesel ac , I have a deisel pickup that runs 13.5 quarter miles and works all day long. the diesel techno how is great in the vehicles if only they could get it into a fourwheeler . but I would not buy , the deisel and 1\2 strokes are to much maintanence . Just start the old thumper and go , no letting it warm up for 1\2 hour or cool down , just go. just me though?

Posted by: Junkman673

I can't imagine that a 2stroke would make a good trail ATV. I used to ride 2 stroke bikes and they were good for racing but not so much for trail or Mountain riding. They just don't have the torque of a 4 stroke. You have to keep a 2 stroke wound up pretty high to make good power.

Posted by: Junkman673

Yeah, you've got a point. I'm just speaking from past experience on 2 smokes. The ones(dirt bikes) I've been on are all power on the top end and not much for low rpm grunt.

Posted by: joshk1234

Buy an old school scrambler lol