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angelix wrote:

paso750 wrote:

(2 pickups and two modules)

and different flywheel, isn`t it ?

G.

Unless you want to do dome machining and loose the original parts from the 906, the list of what is needed is simple... out of a SS-Monster 900 750-900 carburated youi need:

- left crankcase cover (including the stator)
- flywheel
- Rotor (for the generator)
- pickups
- a pair of coils
- Ignitech or KoKusan modules
- consumables (faston wires, solder, shrink-sleeve, etc etc)

everything can be found on ebay, then the fitting is a matter of a couple of hours, knowing what you have to do.

Most probably there will be the need of some drilling / tapping to fit the pickups.

alternatively you can do it using the original cover (with stator) and the generator rotor, but the cover will need a small hole for the pickup cables to come out and the old pickup location will need to be sealed.

There is a guy here in oz that has made a replacement unit for the Digiplex that might be able to be reprogramed http://www.cajinnovations.com/MyECU/MyIgn.html I might give him a try, it would save having to replace fly wheels, side covers etc.

Duc906 wrote:Thanks for the ideas, they are all welcome. There is a guy here in oz that has made a replacement unit for the Digiplex that might be able to be reprogramed http://www.cajinnovations.com/MyECU/MyIgn.html I might give him a try, it would save having to replace fly wheels, side covers etc.

Mobius wrote:Fascinating, and some might say insane: spending all that time and money on an antique which was down on power to begin with.

I guess a SC might make the bike have the sort of power it "deserved" when it was new. Personally, I would not do this to my own bike, but I would be happy to buy one already converted. I can imagine the torque on such a motor will be truly stunning, and wonder what sort of figures the bike might make on a lazy 4lbs boost. Also, what sort of fuel consumption???

The bike already suffers Extremely-Small-Tank syndrome and I am confident my wife's 2-litre Mitsubishi burns less fuel than my 906! Maybe you can pod-filter the air, and ditch the airbox, and increase tank capacity at the same time?

Anyway, best of luck to you, your project looks brilliant, and challenging, and I bet any 906 owner would give their left lung for a 906 with "real" power.

Mobius wrote:Fascinating, and some might say insane: spending all that time and money on an antique which was down on power to begin with.

I guess a SC might make the bike have the sort of power it "deserved" when it was new. Personally, I would not do this to my own bike, but I would be happy to buy one already converted. I can imagine the torque on such a motor will be truly stunning, and wonder what sort of figures the bike might make on a lazy 4lbs boost. Also, what sort of fuel consumption???

The bike already suffers Extremely-Small-Tank syndrome and I am confident my wife's 2-litre Mitsubishi burns less fuel than my 906! Maybe you can pod-filter the air, and ditch the airbox, and increase tank capacity at the same time?

Anyway, best of luck to you, your project looks brilliant, and challenging, and I bet any 906 owner would give their left lung for a 906 with "real" power.

stigonpaso wrote:I'm planing on using his MyIgn seeing as my Digiplex as gone bananas.

How do you feel about converting to fuel injection? Mega squirt make some nice DIY F.I. engine management products.

paso750 wrote:a friend has a carb converted ST2 engine and all he did to the engine (when replacing the complete injection and ignition system) was swapping flywheel and pick ups. There was no need to modify or change stator/rotor or alternator cover. The cover has the front pass through for the wiring and there`s a plate to cover the hole of the single pick up. (I have that too on my 750 btw)
The ST2 engine still has the bosses to mount the pick up carrier so no drilling or welding was required. Only later models didn`t have them anymore so that shouldn`t be a problem on a 906.

I don`t think the coils need to be changed as on the 906 they are 3 ohms, too. At least Ken has the Dyna coils already so that would come off the list.

So that`s all fairly easy but the complete wiring modification to replace the Marelli with the Kokusan units with their different connectors would be more work.

There is a guy here in oz that has made a replacement unit for the Digiplex that might be able to be reprogramed http://www.cajinnovations.com/MyECU/MyIgn.html I might give him a try, it would save having to replace fly wheels, side covers etc.

I wonder how useful that is. There are only 3 preset advance curves you can choose. 25° may be too little and 35° may not make much difference as original is 36°.
The Silent Hektik Marelli replacement has 16 selectable curves but is quite a bit more expensive.

If you had the Kokusan ignition you could try the flywheel of a 600 Monster/SS which has 32° advance and is also quite a bit lighter. (you may have to lower the height by ca. 4mm though)G.

It said on his web site that it may be able to be reprogramed