Turning an AX100 into a bucket

**Skunk** · 28th January 2008, 19:30

As many of you know (and have donated parts, advice and 'other comments') I have been building and modifying an AX100 into a reasonable bucket. (Rider may improve over time

)

This thread is just to show the development of said bike. Thanks to the following for the donations and advice:
AJturbo (KB)
Bayden
Boyle Kawasaki
Bungbung (KB)
dhunt (KB)
F5 Dave (KB)
Ivan (KB)
Saxet (KB)
Speedpro (KB)
Pete Sales Motorcycles
Pickle (KB)

and mostly Skunk Control

Standard AX 100 Specs
Engine : 2-stroke, 1 cylinder, air-cooled
Piston Displacement : 98cc
Bore x Stroke : 50.0x50.0mm
Compression ratio : 6.6:1
Maximum power : 7.5ps/5,800 rpm
Maximum torque : 0.99kg.m/6,500rpm
Starter system : Primary kick
Transmission : 4 speed
Dry mass : 82kg
Suspension Front : Telescopic, oil damped
Suspension Rear : Swingarm, oil damped
Brakes Front : Drum
Brakes Rear : Drum
Tyres Front : 2.50-18
Tyres Rear : 2.50-18
Fuel tank : 12.0L

Pics:
1. Purchased in Feb 2006 the bike cost $100 (actually it was two for $200 and the other one was better - it ran!) This is as it was when I wheeled it into the garage. Let the mods begin (with no money)

2. Stripped everything I didn't need off the bike. Cleaned the carb, changed the oils, lubed the bearings etc. Got it running and added some stickers. First race at Kaitoke in the rain. Couldn't quite get past Ivan on the CBR150 under brakes. Decided that would be the first mod.

3. Bye-bye front drum brake; hello RG50 forks and CB125 front wheel. Now I can stop. Got these from a friend of mine.

4. Same thing as 3. Just shows you more of the back yard. Built that wall myself...

5. New rear wheel. Why? Because it was a Kawasaki one.

6. The chamber off a TZR250. Helped a bit.

**Skunk** · 28th January 2008, 19:31

Next up:
1. Rebuilt engine and gearbox. Lasted a few laps. Too lean, wrong porting. Sent it to Pete Sales who did his 'magic' including port shaping, reeds, jetting, machining squish into the head and dyno tuning.

2. Most recent pic of it at Taupo Road Race Spectacular. New front disc, 17" wheels. Emulators in the now CB125 forks.

Current AX 100 Specs
Engine : 2-stroke, 1 cylinder, air-cooled
Piston Displacement : 98cc
Bore x Stroke : 50.0 x 50.0mm
Compression ratio : 15:1
Maximum power : ?/10,500 rpm
Maximum torque : ?/?rpm
Starter system : Push
Transmission : 4 speed
Dry mass : ?kg
Suspension Front : Telescopic, oil damped via emulators
Suspension Rear : Swingarm, oil damped single shock
Brakes Front : 300mm Single Disc, sliding single pot caliper
Brakes Rear : Drum
Tyres Front : 90/80 17
Tyres Rear : 90/90 17
Fuel tank : 12.0L

3. (If there was one) The new paint job and mono-shock rear. No longer is it an AX100. It's now an AX1R!

**Skunk** · 28th January 2008, 19:31

Now to do it all to a new AX100...

This one will be offered to another member who has named it 'Pamela'. I call it 'Blue Poo'

**gav** · 28th January 2008, 20:28

Originally Posted by Skunk

As many of you know (and have donated parts, advice and 'other comments') I have been building and modifying an AX100 into a reasonable bucket.

So, have you got there yet?

**Skunk** · 28th January 2008, 20:33

Close now... bastard

**diesel pig** · 28th January 2008, 20:36

So does have the 4-speed box still?

**speedpro** · 28th January 2008, 20:39

you have to find a decent gearbox to put in these things, really.

**diesel pig** · 28th January 2008, 20:53

thats what I mean, is hotting up the motor with just a 4-speed box a good idea?
GP100's have 5-speed boxes but with there strange gear ratios they are very hard to ride with hotted up motors, so a 4-speed box it would be even worse I imagine.

**nudemetalz** · 28th January 2008, 20:58

Just be 4-speeds and lotsa clutch slip

**gav** · 28th January 2008, 20:59

Would a six speed TF100 bottom end fit? Only thing is the TF's seem to be getting rarer than MB5 boxes, OK, maybe I exaggerate slightly

but if you're paying The Man to do porting etc are you really going to get the benefit of his touch, with only the four on da floor ?

**Skunk** · 28th January 2008, 21:06

Originally Posted by diesel pig

So does have the 4-speed box still?

Yep.

Originally Posted by speedpro

you have to find a decent gearbox to put in these things, really.

I wish.

I've been told it's one-of-a-kind-design type of motor. It you know different let me know what box will fit!

Originally Posted by diesel pig

thats what I mean, is hotting up the motor with just a 4-speed box a good idea?
GP100's have 5-speed boxes but with there strange gear ratios they are very hard to ride with hotted up motors, so a 4-speed box it would be even worse I imagine.

I had thought about going to the GP100 engine. The only reason for staying with the AX100 donk was because that's the way it happened. Not planned or anything. Every plan I've had has come up to a 'big expense' wall and ground to a halt. TF125, KE125, RX125, MB100 - all planned and none have happened.

I'm not planning on modifying the engine any further. If something comes along though I'll see how it goes.

**Buddha#81:Me** · 28th January 2008, 21:41

CVT trans.....then it would ALWAYS be in the power

**Skunk** · 29th January 2008, 07:58

Originally Posted by gav

Would a six speed TF100 bottom end fit? Only thing is the TF's seem to be getting rarer than MB5 boxes, OK, maybe I exaggerate slightly

but if you're paying The Man to do porting etc are you really going to get the benefit of his touch, with only the four on da floor ?

The work he did was meant to be just to get it running right. Someone had 'had a go' at porting it but only stuffed it up. Pete fixed it as best he could without costing much while keeping in mind the four speed box. He's done a good job I think.

As to matching the barrel up to another case, if I could find one that fits at a reasonable price... I have a TF125 (5 speed) but that doesn't match up. How different is the TF100?