Bmw Atv

[rkasal]

Hypothetically speaking, what BMW engine would you use if you were building a BMW powered ATV? I think two-wheel drive for now.

I would probably use a modified Yamaha Blaster frame but am open to suggestions. After the frame is modified and the engine/tranny added, then maybe someone could design an exterior which I would have built.

In short, I may after careful consideration start a little project and am soliciting ideas. Yes, I know someone has done this but let's use our collective experiences and skills. Airhead, oilhead, K, what would you use and why? Probably want to keep it under 1000cc. I'd use BMW clutch, brakes, lights, etc.

[PGlaves]

Hypothetically speaking, what BMW engine would you use if you were building a BMW powered ATV? I think two-wheel drive for now.

I would probably use a modified Yamaha Blaster frame but am open to suggestions. After the frame is modified and the engine/tranny added, then maybe someone could design an exterior which I would have built.

In short, I may after careful consideration start a little project and am soliciting ideas. Yes, I know someone has done this but let's use our collective experiences and skills. Airhead, oilhead, K, what would you use and why? Probably want to keep it under 1000cc. I'd use BMW clutch, brakes, lights, etc.

K100 two valve would be my choice.

Easy maintenance - as sturdy as a brick!

Or K75 - same attributes.

[flash412]

Bombardier has used the F650 motor in one of their ATVs.

[Troutluck]

Here (http://www.we-make-money-not-art.com/archives/2008/01/the-zak-gallery-in-berlin.php) are some guys with some experience in that regard:

http://www.we-make-money-not-art.com/archives/2008/01/the-zak-gallery-in-berlin.php

I like the red one, personally. Should this be moved to "airheads"? :)

[PGlaves]

Here (http://www.we-make-money-not-art.com/archives/2008/01/the-zak-gallery-in-berlin.php) are some guys with some experience in that regard:

http://www.we-make-money-not-art.com/archives/2008/01/the-zak-gallery-in-berlin.php

I like the red one, personally. Should this be moved to "airheads"? :)

No - move it to K bikes - that is the engine to use.

[rkasal]

Having a K75 and two F650's I'd be leaning that way but still wonder what the pros and cons would be of using an air cooled engine for an ATV.

Did like that Polish tractor site but hopefully, if I build and ATV, the final result will be better cosmetically.

Is it correct to assume that an airhead would be more useful in temps below freezing? How about at 100F temps? Does and airhead cool well enough or should it also be oil cooled?

I think between the K75 engine and the F650, I would lean towards a carb F650. Much simpler.

[Troutluck]

Is it correct to assume that an airhead would be more useful in temps below freezing? How about at 100F temps? Does and airhead cool well enough or should it also be oil cooled?r.
My unscientifical guesstimation tells me that at lower ATV speeds, an aircooled/oilcooled BMW powered motor would probably suffer without sufficient airflow, especially if the front two wheels/fenders blocked the airflow to the jugs. In cooler climates, who knows?

[GeoffMiller]

Why reinvent the wheel. Just run on down to your local friendly ATV dealer and buy one! Multi-cylinder, liquid cooled, auto transmission, and all of the bugs already worked out of it. All of this for less money than you will spend for a custom build. There is nothing particularly special about any of the engines that you propose. A modern ATV is going to have an engine designed for that particular application.:scratch

[rkasal]

Why reinvent the wheel. Just run on down to your local friendly ATV dealer and buy one! Multi-cylinder, liquid cooled, auto transmission, and all of the bugs already worked out of it. All of this for less money than you will spend for a custom build. There is nothing particularly special about any of the engines that you propose. A modern ATV is going to have an engine designed for that particular application.:scratch

Because I think BMW is missing the boat. They already make everything needed to produce an excellent ATV. It is a learning process for me but mostly, think of it as a proof of concept.

BMW has a virtually ready-made revenue stream right under their noses.

Do I think BMW would suddenly start making ATV's just because me or someone else builds one?

No. It would be a fun endeavor.

An oil/air cooled may work by putting the oil cooler up higher. Will have to study the fluid dynamics in regards to whether the oil pump is up to moving the oil up about two feet or so.

Starting to sound more like liquid cooled is the way to go. I think a carbed thumper engine.

[The_Veg]

Do I think BMW would suddenly start making ATV's just because me or someone else builds one?

If you're referring to the GG-Quad, it's no ATV. it has four wheels and a handlebar, but the similarity ends there. The GG-Quad is a high-performance street vehicle.

[rkasal]

If you're referring to the GG-Quad, it's no ATV. it has four wheels and a handlebar, but the similarity ends there. The GG-Quad is a high-performance street vehicle.

Not sure what that is but I want a four wheel ATV that I can take over the snow and mud. Mostly snow. Not really looking for high performance. Probably 70mph is too fast.

[GeoffMiller]

For the first time Frankenstein machine builder, a chain drive two wheel drive, performance atv would make a good base. Adapting a chain drive would be much easier than a shaft drive. The performance atvs have smaller and harder (higher pressure) tires than other atvs. My Yamaha Big Bear, four wheel drive air cooled four stroke, only carriers5 lbs air pressure. 50 mph and you start thinking about filling your diapers, particularly on black top! Fun motors? How about a 70's 500cc Yamaha two stoke with a four speed out of a motorcrosser. Or maybe a RZ350 water cooled two cylinder two stroke. Snowmobile two stroke with the torque converter hooked up to the rear axle via jackshaft. The possibilities are endless and the chance to hurt oneself unlimited!:D

[GeoffMiller]

For a fun street machine, the new Bombardier three wheeler looks like a hoot and the price ain't too shabby! Much more affordable than the quad. I sat on one at Leo's BMW in Burnsville, Mn and it was way cool. They had to cut a deal with the buyer to leave it in the showroom through the winter so people could check it out. Every machine that they got literally flew out the doors!