A build for the air cooled Ya*^#a lovers (SHARKY?)

[EFE 1230]

http://www.streetfighters.com.au/forum/upload/104173909470889.JPG



Found this "in progress" build, shame about the motor choice though! :D:D:D

[EFE 1230]

http://www.streetfighters.com.au/forum/upload/104173909463457.JPG


Dutch builder.

[EFE 1230]

http://www.streetfighters.com.au/forum/upload/104173909470542.JPG

[Weaselman]

eeeeeeeeeefffffffffffff jaaaaaaaaaaaaaaaaaaaaaaaaaaayyyyyyyyyy

[crazymofo]

looks trick but i dont like the swingarm pivot location, its gonna cause some issues with handling when getting on the gas

cheers.joe.

[Hagarr]

Yeah way low isn't it!!

[Hagarr]

Actually thinking about it the pivot point below the sprocket centre helps stop wheelstanding doesn't it???

[crazymofo]

it wouldnt, if anything it would cause more! piviot point lower then the sprocket line will cause the bike to squat and unweight the front of the bike under power.

having the pivot above the sprocket line will pull the rear tyre into the ground harder for more grip and keep the front down more, however, go to high and you can actually stop the rear suspensions ability to absorb bump while on the gas.

the further the pivot point is front the sprocket (rearwards) the more pronounced the effect of pivot height will be.

cheers.joe.

[Hagarr]

Ah! so you're saying the distance from the pivot point to the centre of the sprocket (in horizontal?) should be as close as possible.

In other words the swing arm should have been longer?

[EFE 1230]

I don't think the pivot location will affect much boys remember it's powered by a YAMAHA!

It probably won't get up enough speed to splat flying bugs let alone worry about cornering/traction/wheelies when it finally gets ridden!!!!!

[crazymofo]

ROFL!!! EFE, so true

hagarr, general consensus for the new factory bikes is for s/arms to be around 600mm, but older engines can make that hard sometimes, without ending up with a 1600[+]mm wheelbase

but generally thats right, the swingarm pivot should be as close to the sprocket as posible (strictly speaking in terms of its location on the horizontal plane) the further away it is on a horizontal plane, the more pronounced the effects of power on the chainline and rear suspension.

its height (vertical plane) will affect squat (how much the bike unweights the front on acceleration) and anit-rise (how much the bike unloads the rear under braking)

im actually guessing the frame was designed and built for a different motor.

cheers.joe.

[sharky]

quote:I don't think the pivot location will affect much boys remember it's powered by a YAMAHA so it will hook that front wheel in the air anyways...!


:D