ds450 hybrid?

[k4f5x0r]

not planning on doing this i just got a idea.

what if someone took the VERY light chassis from the DS450 and put a 250r motor in it? probably would need a decent amount of modding but it would be a damn light bike dont you think? :devil:

[250Renvy]

It wouldn't work because the chain and everything is on the opposite side.

However, if you could find a 265 rotax motor, that would be something of a machine.

[k4f5x0r]

hm true. unless someone fabbed up a swingarm from a existing one that was close. or by just modding the stock one.

just an idea i had. hell maybe even the kfx frame would work.

[250x_kyle]

just depends on the skills of the fabricator what can be done. options are endless with the right tools and some time.

[rustyATV]

Originally posted by 250Renvy
It wouldn't work because the chain and everything is on the opposite side.

However, if you could find a 265 rotax motor, that would be something of a machine.

Like the Rotax 257 GS?

http://atv.off-road.com/atv/article/articleDetail.jsp?id=190534

Found also on the ATK 250LQ and 260LQ bikes

http://www.atkmotorsports.com/atkbb/viewtopic.php?t=955&highlight=parts

[racermike311]

Couldnt you just flip the carrier for the chain and brakes. I know it has been done on cannondales.

Originally posted by racermike311
Couldnt you just flip the carrier for the chain and brakes. I know it has been done on cannondales.

Yep should be able to.

And the people in the hybrid forums should stop asking what has to be done to build a freakin hybrid! ITS ALL THE SAME ITS A HYBRID!!!! You need to cut off the factory mounts and make and weld in new mounts and make a intake tube. All hybrids need the same mods done their no differant than another.

And all the new quads with them new aluminum frames are not lighter than the older quads with weld frames. To build a aluminum frame you need to use more metal for it to be just as strong as steel. The new frames are not making the quads any lighter. The adds you read just mention its aluminum to make it sound light when its just as heavy as steel or heavier. Go weigh em. If I remember right my whole steel welded 400ex frame with the sub frame was only 28lbs. Im almost sure the kawi 450 aluminum frame is heavier than steel frames. And don't forget the aluminum frames viberate you to death compared to steel frames. The only smart thing going on is no weld frames. Going to aluminum is not a smart thing or a bad thing but the only real advantage you get is a rust free frame.

[Derrick Adams]

I don't know if I agree with that. I think weight isnt the real advantage of an aluminum frame, But I think there are advantages. One of which is handling. Everytime i've read an article on an aluminumed framed bike they've said it corners fantastically. Is that a coincidence?

I dont know this to be fact, but I have to think that the aluminum frame flexes more and contours to the track better, so to speak. That would also explain why the aluminum framed bikes are not rigid and why no-one adds gussets. I think the added vibration you speak of may be a good example of how the aluminum frame absorbs impact and harmonics.

Not to mention that you cant even buy a steel framed dirtbike nowadays. There must be reasons why they all switched, and we both agree its not weight.

But back to the original question, I agree that an aluminum framed bike such as the DS450 wouldnt neccessarily be lighter, but it sure would be cool!

I think they only handle better from the A-arm mounts being closer together on them frames. They could build a steal frame the same way.

[k4f5x0r]

i agree but the ONLY good thing about steel is its easy and cheaper to repair. but also much easier to damage. i havent heard one case where in normal wear(mx gncc etc. not rolling it down a 300 foot hill climb) where a kfx frame broke. ive heard of mutiple cases where trx450 frames where broke by just casing a jump.


and i started this thread to get some activity in here and to get some input. just thought it would be pretty cool seeing a aluminum frame witha 2 stroke motor.

[woodsracer144]

hey, some where on here some one used a cannondale chassie on here... its a sick set up... the chassies are really cheap too...

[rustyATV]

Aluminum does not dampen vibration like steel/iron does. It's just a property of the material.

Aluminum also is less rigid than steel, fatigues faster than steel, and is more susceptible to stress risers if I'm not mistaken.

What aluminum allows you to do, though, is use geometry to create strength by building larger wider sections, but without a weight penalty.

An example of this are CR250 frames: note how later aluminum frames haver very wide upper rails, where the older steel frames use the same diameter tube all around. This allowed Honda to build a frame that was very rigid vertically and fore and aft, but was still narrow and flexible from side to side and in torsion, which gives a bike its cornering tractability.

A quad is a bit different animal, however. Where a bike's frame is it's suspension in corners, a quad's suspension is its suspension all the time, and allowing the frame to flex compromises this by altering the suspension's geometry, making handling inconsistent.