build started

SUMO · Post by **SUMO** » Tue Nov 27, 2007 3:27 pm

well - last weekend hit the garage pretty hard and got a decent way on this - frame now off at my frame man for bits adding to it and then i can get back on it

hellish long thing haha - only added 170mm into it but it seems big - god knows what ill do about bars...

prepare for the barage of questions

oilburner · Post by **oilburner** » Thu Nov 29, 2007 12:09 am

Although it's a fair bit more work, there may be a couple things you can do to keep the frame stretching to a minimum, and be able to use regular handlebars. You can probably mostly eliminate the need for the arched backbone by lowering the engine between the downtubes, remembering to leave sufficient road clearance. This would involve cutting off the downtubes and widening them to clear the bellhousing. This of course would result in misalighment of the gearbox and driveshaft. This could be resolved by relocating the swingarm mounts downward. If your rolling chassis is a Ural or a Dnepr, you can likely shorten the swingarm and driveshaft a couple inches to further reduce the stretch.

Avery

reg hardlyrideables · Post by **reg hardlyrideables** » Sun Dec 09, 2007 9:42 am

nice project ive seen this over on britchopper forum me too just started a 3 cyl project im using a lister watercooled lump honda hardtail chop frame gsxr wheels and a car gearbox think im gonna have a long frame too but thats how i ike them

SUMO · Post by **SUMO** » Sun Dec 09, 2007 10:01 am

thanks man - bit of a stand still till i get my frame back from my frame man bu tthat should be fairly soon, just working out the clutch / flywheel setup now all looks reasonably straight forwards

reg hardlyrideables · Sun Dec 09, 2007 10:04 am

im at a stand still too been stuck at home with me leg in plaster after having another bonegraft and plate in the leg got another 8 weeks yet

bored isnt the word

SUMO · Post by **SUMO** » Mon Jan 07, 2008 12:12 pm

bit more progress
gearbox nearly onto the engine so all is going well

quick throw together over the xmas hols and this is what it will look like basically...

andrewaust · Post by **andrewaust** » Mon Jan 14, 2008 3:49 am

Hay Sumo!

Looks like your build is getting along really well. Will be great to see the end product, its looking really solid frame wise.

Cheers

Andrew

balboa_71 · Post by **balboa_71** » Wed Jan 16, 2008 10:24 pm

Sumo,
I may have missed it in a previou posting: is that a 3 cylinder Kubota? If so, what HP? Nice job so far, should be a good runner. BTW, I'm interested in the details around mating the engine to gear box should you get the to post details.

Cris

SUMO · Post by **SUMO** » Wed Jan 16, 2008 10:33 pm

machine flywheel out to take bmw clutch

plate on engine back

plate on ural gearbox

am waiting on flame cut blanks of these mdf pieces then will weld a tube between the 2 and they are mated.

and yes - kubota 3 cylinder

TimppaX · Post by **TimppaX** » Thu Jan 17, 2008 8:51 am

Intresting adaptors. Must save those photos for my project. I have Dnepr gearbox, at this point. And have no idea how to mate twin onto it.

oilburner · Post by **oilburner** » Thu Jan 17, 2008 9:43 am

SUMO's adapter is constructed using basically the same method I used to mate a BMW gearbox to my Daihatsu D950, the difference being I made mine from 6061 aluminum. Also, I fabricated the two rings from 3 inch 6061 flat bar (cheaper than buying two large aluminum plates). Because of the distortion caused by welding, I made the plates extra thick, and once the welding was finished, I took the adapter to a machine shop where they machined the two surfaces so that they were flat and parallel to each other. It doesn't take much runout to cause premature wear and failure of the gearbox splines.

Great job SUMO, looking forward to the next project update!

SUMO · Post by **SUMO** » Thu Jan 17, 2008 9:52 am

yep - i saw your ali version - i cant weld aluminium though so steel it is...

using 6mm plate and doing the same - getting it machined parallel after fabrication.

TimppaX · Post by **TimppaX** » Thu Jan 17, 2008 12:13 pm

My project needs extra flywheel since engine output is on the other end of original flywheel. So less vibrations? Or nearly mission impossible?

MNBill · Post by **MNBill** » Wed Jan 30, 2008 5:39 pm

Sumo,

How are you coming along on the build. I have been watching this thread and the one on Brit Chopper hoping for the additional build details and updates on progress.

Your project has me thinking about doing a Ural Diesel build. Any additional info/photos you can give about the conversion using your Kubota and Ural would be greatly appreciated. I am really interested in the adapting of the Ural clutch/transmission to the 3 cylinder diesel.

Best of luck!

Bill

SUMO · Post by **SUMO** » Tue Feb 05, 2008 9:43 am

tacked up but basically there. now just got to wrap a bike round it...

Post by **Byrdman** » Thu Feb 07, 2008 3:14 pm

Looking good, can't wait to see it in the frame!

SUMO · Post by **SUMO** » Fri May 02, 2008 8:18 am

been slow - just a load of other stuff on - you know how it is im sure

tank cut and hacked and butchered - needs plating back in now but the general idea is there

new front wheel in, spaced, new bearings and twin disks up front. i have just over 1/8" clearance either side of the caliper so its a cozy fit but a miss is as good as a mile so its a result - i dont think it looks too bad - this is not going to be a pretty bike by any stretch of the imagination anyways. just need to weld 4 tabs on the lowers to bolt the calipers to and thats an easy mod dealt with

oilburner · Post by **oilburner** » Sun May 04, 2008 10:34 pm

SUMO - how did you align the Ural gearbox with the Kubota engine for tack welding the adapter plates to the tube???