Getting closer to fire up. Clutch from 906 fitted to the 944. 3D printed clutch holding tool worked well. 20251006_201949.jpg Bit of a setback, ST2 coolant pump outlet is incompatible with Paso pipework, could not work out an elegant layout so decided to bypass the thermostat. Cut up a Ford Falcon h...

Had to notch the lower mount to clear the rear shock linkage mounting. Removed 5mm off the left hand lower mount with the flapper sanding disc. 20250928_153116.jpg Fits like a glove, no shims needed. Absolutely chuffed, now to wire everything up to the Speeduino, fit new belts and clutch and get som...

ST2 motor modified and fitted. Stock width 85mm from CL. 20250928_135322(1).jpg 904 case width 65mm to CL 20250928_135424.jpg With that amount of material to remove the cutoff blade was used to remove the bulk, and a flapper disc to sand back flat. The flycutter then squared it up. 20250928_140251.j...

All going well with the engine transplant I will be riding down to Bluff after the Paso riders event in Chch end of November.

For those of you with machining experience please be forewarned, the following may be upsetting. Didn't want to mount the engine in a mill nor attempt to cut freehand so have gone for a halfway house, the width adjuster tool shaft is a touch under 20mm for easy running on the inner needle rollers le...

Nothing is more infuriating than carefully laying everything out in the morning, putting all the appropriate parts in little labelled plastic bags only to unbeknowingly drop one of the little orings - unfortunately the smallest one that was totally silent as it bounced out the garage door and out on...

Unfortunately the ST2 motor was not shipped complete as expected and had to fit a flywheel afterwards. Below are dims for making your own tool if so desired, needed 270Nm to do up the nut. Note a blind puller was used to remove the outer pivot bearings but the inner one was left inplace to guide the...

Did you ever get a solution to this Stepaso? I am looking into adapting a J W Speaker part #0554451 = ECE LHT LED High & Low Beam Headlight with Black
Inner Bezel. This part number is for the "left hand traffic" = LHT which is ideal for NZ. Will significantly improve the lighting.

Rough date late November based around Christchurch, should get some great footage if the weather is good. Check facebook group for details.

No the ST2 engine is wider around the swingarm pivots and the lower rear engine mount. A fair few mm of aluminium has to be milled off to make it a bolt in job.

Yes, the Speeduino is setup using the Tunerstudio software. Crank rotation is natively handled as a 5v square wave Hall effect signal, however a separate VR board can be used to process the ST2 signal. I don't have a VR board so will adaptor a ZF hall sensor instead, still reading the timing gear at...

Spark advance settings translated from OEM Digiplex 2s curves to the Tunerstudio table.

Thanks for the Ignitech link Gert, it is a very sensible solution but I am keen to pursue a different route (i.e. I have one in my drawer from another project). If Speeduino proves unreliable during test runs will go for Ignitech. The service manual for the 906 has an ignition map based on MAP load....

weekend fun.jpg Bought this old girl in Feb with 92k km on the clock, was hoping to crack 100k but was leaking/burning oil badly. I rode it nearly 4k km before doing a teardown inspection and discovered that it was quite worn internally - loose crank plug, badly pitted 3/4/5 gears, notchy mains bea...