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Old 02-19-2015, 03:56 AM   #1
WILL_S OP
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Big Wheel Dual Range dune climbing desert bike

This has been on the cards for awhile.Been dreaming and buying stuff scratching my head and bouncing ideas.Basically i need a bike that is very economical ,able to climb dunes and go where there are no tracks and carry the required gear to go solo.
So a few years back i had this collection of stuff to build my ultimate desert sled.



There is a sidecar in there as at that stage i thought i might need it to carry water and fuel.this may or go.if it stays it will probably end up a leaner

Next comes the rear hub to carry the big wheel thats going to launch me up the dunes.So i grab a BW front and decide to make into a rear.This is where i rope Drjoe into the project.I send him a pic with what i think will work.Take it up have a chat and yep it can be done oh and i had a quad wheel to go with it.







My collection of bits at the time



To be honest i cant remember how long ago that was,time flies.
Joes a very busy lad building all kinds of cool shit that he doesn't mention on adv.
Here he is building something that ended up being a all nighter whilst i slept on his workshop floor



Allright back to the project.
So i think i might need a bigwheel frontend
Atc triples ,the first set had rake built in the next set did not.I have a couple of old cr80 35mm showa forks laying round that will fit straight in.Problem is i have been running usd in my other bike[ct110 thats a 127cc another project] and they work well.So another they might stay or go.



The rear suspension i grabbed these shocks



To make the suspension work some mods had to be done to the pivot point.
Stealing the tube for the new pivot point





Jig it up in the new frame



Zap it in





At this stage i think the dog is wondering wtf



So go for some creative time.... give em the bird eh



I awake from my creative time and realize their there is abetter way to get the nice big rear end i desire.......ebay

So up turns a complete rear wheel with axle.....easy.



DOT approved





That leaves a swingarm and jackshaft to be made.
Grab a old swingarm and make a jig that is adjustable in length and width.





aaah the motor.A dual range.It won't be your normal dual range 110.More on that later.



ATM tossing ideas back and forth with Joe about using ct110 gearbox shafts for jackshaft.What is more amazing is what he is doing with one
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Old 02-19-2015, 06:17 PM   #2
nbleak21
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Gotta see this...

I'm totally in for the build!
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Old 02-20-2015, 07:40 PM   #3
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Have you thought of using an atc 125m engine. There were two versions and the earlier is a124cc horizontal with the dual range and an electric starter.
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Old 02-20-2015, 08:22 PM   #4
Onederer
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Have you even heard of a Suzuki RV125? http://www.suzukicycles.org/RV-serie...shtml~isoraami

Light weight two-cycle engine, dual range transmission, wide tires, street legal and they even came with an air pump mounted to the frame.

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Old 02-20-2015, 10:36 PM   #5
Te Hopo
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Wow, what a cool concept, now we've got a pair of big wheel projects here in Some Assembly Required at both ends of the spectrum.
A CR500 big wheel for those insanos and a very practical dual range postie bike big wheel.
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Old 02-20-2015, 11:00 PM   #6
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Quote:
Originally Posted by redprimo View Post
Have you thought of using an atc 125m engine. There were two versions and the earlier is a124cc horizontal with the dual range and an electric starter.
Yes i have played with ATC125 engines.Stuck there internals into a 110



This motor will be a wee bit bigger,think stroker+bore
More on the engine when i get to which way i'm going,got a couple of options from 145 to 170cc or....




Quote:
Originally Posted by Onederer View Post
Have you even heard of a Suzuki RV125? http://www.suzukicycles.org/RV-serie...shtml~isoraami

Light weight two-cycle engine, dual range transmission, wide tires, street legal and they even came with an air pump mounted to the frame.

Cool beast and skyteam do a copy with adr for oz,but where's the fun in that .Straight out of the box some assembly required.
http://scooterswa.com.au/bikesandbug...t-rex-125.html


I like fab work and have been known to do weird stuff with posties[ct110 trail in US]

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Old 02-21-2015, 07:13 PM   #7
sidetrack one
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Any chance of you getting to the Tiddlers Rally Will?
That is one well set up postie,love to see it!
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Old 02-21-2015, 10:01 PM   #8
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Originally Posted by sidetrack one View Post
Any chance of you getting to the Tiddlers Rally Will?
That is one well set up postie,love to see it!
Would love to get to the tiddlers rally.I'll see how things pan out.
That was the before pic from coast to coast ,it didn't look like that by the end



This is how it rolls now
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Old 02-23-2015, 02:06 PM   #9
Eddieb
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Instead of a sidecar make a mono wheel trailer and have the best of both worlds.
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Old 02-24-2015, 12:40 AM   #10
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Originally Posted by Eddieb View Post
Instead of a sidecar make a mono wheel trailer and have the best of both worlds.
thats not a bad idea.Could un hitch and stash my fuel and water for return trip, instead of lugging for the whole trip.
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Old 02-24-2015, 03:13 AM   #11
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That would be cool and proabably work well but there are areas where your heading that quick direction changes around obstacles are needed so a trailer would need to be kept short enough that you wouldn't mind taking through the pine tree single tracks at the back of peachester.

So will had anymore thought about that special jack shaft we spoke about?
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Old 02-24-2015, 03:29 AM   #12
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Yeah trailer or sidecar might not be needed if the fuel capacity works out,slow and steady no race.I am full bore cleaning out workshop so lathe can b set up and i have room to move.Hopefully in the next week i'll have workshop done, got a nice little welding bay so no more sparks on my bikes and projects

Yep plenty of jackshaft/dual range ideas.
Luckily you keep adding big tools to your workshop
Got a issue that might need to be resolved.Looks like suzuki have a unusual way of retaining cush bearings.This carrier the bearing doesn't have a retainer it just goes in and hopefully the inner sleeve pushes it out to where it needs to be for the carrier to run once the axle is tightened,weird.
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