Dry Lakes Racers Australia

Dave ,nice fabrication on the tank
Extended swing arm , gives room for a tank in front of the rear wheel !
My pics are of A G. 1350 , reality is Bones and Greg W , have that put to rest ( unless I make a super hp 1350 engine )
A means I sit below the rear wheel height , and my feet are along way back
Fuel tank is under the bike
Me , my laptop and My Motec box are still. @ war , but I will win !
Dave ,cut your legs off
I'm full of good ideas !

Dave, you're right but shave off the beard and, well, who knows?
That wasn't the bike I had in mind, I was thinking the one that comes up as first, second and third on the images page. Add the maximum allowable fairing coverage and that would be a real weapon. I saw the bike you mentioned a couple of times at my start line, it was intriguing to say the least. I like unconventional thinking.

Cheers
Dave The meds don't seem to be working!

Harky
I would NOT have a water tank up in the seat like that.
It will give you handling problems.
Dave
You won't go fast if you make such big compromises( it will be harder to load)
My bike is so heavy and awkward it takes 3 of us to get it on the work bench.
There will always be someone to help at the lake with loading.

I recon with some good bodywork and make the bike as low as possible-- small frontal area--- you should be able to go 140+


My 100cc bike may be up for sale soon. I'm sure it would be good with a 250 in it.

Remember Dave---- frontal area.

cheers Bones

A lot of good ideas , thanx guys. I will lower the seat some more and go to "A" , when I do that ill have to extend the swing arm so I can get in there. As I dont have the equipment to extend the ally one I will make a steel one and put the foot pegs on it or cut my legs off, not sure yet.

Bones I did 140 in 2014 MPS/G, im going for 150+. I should have taken another mile as It still had some revs to go.



Been working on the tank but not much to show for it.

Dave

Bones , there are 2 radiators in there , with a similar surface area and volume to the std busa radiator , so 1 to 1.5 L of water
The long term thinking is I will be in a PS class and the frontal body work will be uninterrupted ie no air inlets ,
So if this works , or a version of this , the weight @ that height or lower if I extend the rear , will not be a big issue
I am listening to anything you say. You have the runs. Pun intended. On the board
Harky

Dave if Bones is selling his 100cc frame and you want to fast track your development , it would be a great start
Riding Bones 1350 this yr was a great experiance, at first i was a little cautious and not expecting to go fast until i got comfortable on it, being so different to my normal ride , but once i was rolling it felt very stable and easy to ride

Harky our rear ice tanks may be contributing to a handling problem we have on the turbo busa , but short of space to put them elsewhere
we definitely need more weight further forward , aiming to get our weight besides being in front of COP within the triangle of axles and headstock
adding wheelbase helps find room

Hi Greg, im happy to plod along with my development, ya have to learn some how. I had another look at Bones "Universal Chassis" post and got a few ideas.

Interesting reading about the axles-headstock triangle.

Dave

Whenever you read about a modern sport bike or race bike development the manufactures always
talk about 'Mass Centralisation'---- All the heavy bits are between the wheels and not too high.
Harky-- if you extend the swingarm a bit , about 200mm, you can fit a water tank in front of the rear wheel and up inside the chassis.
There maybe a picture on my build diary. I had 20 liters in there. Most of the weight was below the top of the tire.

Dave
Extend the swingarm is a good idea--
The sprocket centers on my bussa are 850mm. The chain doesn't seem to have any problems -- No rear suspension either.
If you could get the seat below the tire and keep moving your riding position back until your back is flat and then put the wheel
in to suite.
If you could find a set of USD forks you can lower the front of the bike more. USD forks can be lowered more than conventional forks.
Maybe you could adapt a steel swingarm and lengthen it.

Happy fabricating Bones

Went to the steal merchants today and bought some RHS. They didnt have the size that I needed so I bought the next size up. Go home and had a look. Shit, now I need a longer axle. Ill go back after Easter and get the next size down and thicker wall. Going from Alloy to Steel I can safely go down a few mm. Plus it will be welded together properly not have the bird shit that they class as weld. Pretty average to say the least. I bought some TIG filler rod so will have a go at welding the tank up. I was going to try to braze it with the TIG but BOC would have had to order in the rods, Silicon Bronze, price was scary. If ya go to the 3 minute mark on this video it gives a bit of a run down on how to do it.

https://www.youtube.com/watch?v=C-3exq2Ghl8

Ive got an Aprillia RS250 USD front end here that I thought of using but the fork tops are shaped so they cant be moved more than few mm. I can lift my forks another 20 mm and the front tyre will be replaced with a lower profile one. I measured the top of my triple clamp and its around 800 mm as is, so I reckon I can get it down to 775 mm with the current forks. I think I read that your Universal Chassis was 700 mm Bones? Another thing I could do is make a new lower triple clamp that was stepped up so I could push the forks up more without the seals hitting the triple clamp. A fair bit of work with the tooling that I have at my disposal.

Thanx for the input and ideas.

Edit: Harky, what size and material is your swing arm?

Dave

Dave
the busa has 150 mm added in the original arm
I have spare std arms off old GPZ s Steel
I have another GSX 750 / 1000 arm here
A steel extension onto the original arm is not that difficult !
Come have a look. We can play with the Tig if it helps
Harky

Me again
The foot rest extension in me picture is not the swing arm but an oval tube extension
Come for a drive
Harky

Yep ill take you up on that after Easter?

"A steel extension onto the original arm is not that difficult ! "

Steel extension on alloy arm? I have a spare RGV arm here but as I havnt got the gear or expertise to weld alloy. I thought making a steel one would be the easiest option.

Dave

I C. I thought you had made a new arm and mounted it on the outside of the frame.

Dave

steel wire welding of the tank should not be too hard , done a few cut and shut std tanks , if you cut your side panels to a very neat fit you will need very little filler rod and get a radiused corner rather than a raised seam
one i did earlier

Hey, both Bones and i subscribe to no suspenshion in the rear, and plenty weight, makes for a stable ride,