2014 Supermoto goodness
 

So I am going to let the pictures do most of the talking.

But in a nutshell. I picked up a Rotax 123 for a very, very cheap price.
It came with the 34mm Delorto carb, and a genuine exhaust system. Along with loads of ancillaries for the engine.

Rear wheel is from a scootay, it's 13", I have one for the front too.
Rear is off to my Grandad's at the weekend for a sprocket carrier fitting to it.


I'm almost certain this frame wont work. In which case, it will be for sale.
I think I will need a KZR frame.
BUT, I need somebody with a KZ/KZR to take a couple of measurements for me before I buy one, if possible.




http://i902.photobucket.com/albums/a...psd0ba12ac.jpg

http://i902.photobucket.com/albums/a...psadd929d0.jpg

http://i902.photobucket.com/albums/a...ps7329cbab.jpg

http://i902.photobucket.com/albums/a...ps94770bd7.jpg

http://i902.photobucket.com/albums/a...ps633e3e5d.jpg

http://i902.photobucket.com/albums/a...ps7c9ad85c.jpg

http://i902.photobucket.com/albums/a...ps9e2ad2e1.jpg

http://i902.photobucket.com/albums/a...ps4dafb3ae.jpg

http://i902.photobucket.com/albums/a...ps04d0a1e6.jpg

Re: 2014 Supermoto goodness
 

message what you need measured ben.

doesn't the rotax have the output shaft on the wrong side? No a show stopper, but unusual.

Re: 2014 Supermoto goodness
 

It does. Which wont give me any grief as the rear wheel I'm running is designed to rotate that way anyway.
And with my current swing arm, you can unbolt the sides, and bolt them back on the wrong sides, transferring the little caliper carrier stub to the wrong side.


I need to know the width the swing arm sits between. To see if my swinger would go onto a KZ frame.
If not, then I'd be selling my entire setup, and buying a KZ/KZR.

Re: 2014 Supermoto goodness
 

Youve still got that swingarm!? always loved that swing arm :)

Re: 2014 Supermoto goodness
 

It might be for sale at this rate. :p

Re: 2014 Supermoto goodness
 

Stuck the barrel in the parts cleaned for a few hours. I still need to attack it with a little brass brush though I think.

http://fbcdn-sphotos-d-a.akamaihd.ne...30044607_n.jpg


Waiting on some bits to arrive now.

I've bought a Montessa 250 rear Talon Sprocket, it's 520 pitch, so will run the RS125 chain and front sprocket.
Getting a modified hub to fix it to the scoot wheels.

Second scoot wheel turned up today too.

Still undecided on frame. REALLY want a perimeter frame.

Re: 2014 Supermoto goodness
 

Had a nice constructive evening.

Took the bike apart, and rebuilt the forks and swinger onto my new frame.
It's a Malagutti frame, and conveniently, it's road legal too! :D
It's reg'd as a 50cc, but I will be sending the log book off to change that, to 125cc, so I can take this beast on the motorway if needed.

The swing arm goes in pretty well, bit of spacing required either side.

The forks, I still need to work out. I currently have the pit bike (44mm) taper cups, sitting in the cups from the frame, and then the pit bike bearings in them etc.
So it kind of all works, and due to both sets of cups being tapered, it's all centralized. Just not sure how 'safe' it is.

BUT, I need new yokes anyway, I need something wider set, as the legs are too close, and the wheel doesnt fit properly.
Gonna modify some sports-bike yokes I think.


Now, the frame. I'm quite happy with how it sits. At this stage, I made it a 305 / 310mm shock required:

http://i902.photobucket.com/albums/a...ps691fb90d.jpg

http://i902.photobucket.com/albums/a...ps7f536beb.jpg

http://i902.photobucket.com/albums/a...ps5070ea54.jpg

http://i902.photobucket.com/albums/a...psee5f436c.jpg

http://i902.photobucket.com/albums/a...pse8931953.jpg

http://i902.photobucket.com/albums/a...ps144be4bf.jpg


I was about to call it a night, but then I decided not to. Clicked the kettle on again, and then grabbed the Rotax lump.
Slid the barrel back into place, to mock up the right size of engine etc, and decided to sit it into the frame, to see where I stand with mounts etc.

The RS engine, rear-mount sits on the swing-arm pivot bolt, and conveniently, so does the Malagutti.
And it's also quite convenient, that it lined right up:

http://i902.photobucket.com/albums/a...ps5cc6ab34.jpg


The engine sat really high at the front though, leaving no room behind the barrel to get the manifold on, let alone the carb.
So you see, just further down from the mount, another mount.
I've made two cuts in the tube which runs across the frame, this lines up perfectly with the mount underneath. So I can drill the frame either side where the tube is welded on, and then run another long bolt down through it, to act as another rear engine mount.

It was at this point, where I was quite impressed, as I looked at the front of the engine, and the front lower mount, was about 1mm out from the mounts on the frame. With gentle persuasion (Dead-blow hammer), and wiggle, it went straight into place, and another bolt slid through, as a third mount.

This only leaves one more lower mount at the front to make up, which will be very easy. And then if I want to, I can do something about the upper (Cylinder head) X-member mount, which again, will be pretty easy.

http://i902.photobucket.com/albums/a...ps46e20b23.jpg

http://i902.photobucket.com/albums/a...ps6f631a9e.jpg


Sprocket fits, side casings fit, there is room for rear-sets to bolt to the frame, and then run a linkage for the gears etc. Everything works very well. I'm chuffed!

Only slight glitch is this:

http://i902.photobucket.com/albums/a...psf0329e30.jpg

No room for carb again.
Luckily I can just chop this X-member off completely, weld two lengths of steel flat-bar, or maybe some tube from the two main frame rails, up at about a 45deg angle, and re-locate the shock mount further back, and a little higher. This will give room for the carb, and even an air-box if I am lucky.

http://i902.photobucket.com/albums/a...ps7c5b390d.jpg




Ben

Re: 2014 Supermoto goodness
 

Great work again Ben.:thumbs:


Couldn't you roll the engine forward more, (a more 'natural' position) giving you room for the carb? It'll take some cutting but as long as the chain doesn't eat into the swinger, it should be ok.

The exhaust alignment should be closer then too.

Re: 2014 Supermoto goodness
 

Will have a look today. But I think thw other side will be tight.
its an engine out jobby just to remove the clutch cover. Aha

Re: 2014 Supermoto goodness
 

love it !!!!