Has anyone ever converted a Yammy DT2 electrics to 12V?

[ChrisACT]

I guess the real issue is that it potentially only puts out 100W, which won't be enough.  The headlights I was going to run are 55W x 2 on high beam.  I imagine I need something along the lines of 150W.
I've shot an email off to bettabikes.  I'll see what they have to say.

[LWC82PE]

maybe you could use 2 x 35 watt halogen globes? I know Betta bikes is busy at the moment as i got a SR 500 system down there now and they havent got to it yet. i would be asking power dynamo exactly what that system puts out ignoring their regulators and say you can use your own higher rated one. thats what im going to do.

also  might be something usefull here

http://www.electrexworld.co.uk

also dont forget to see what PVL do

[ChrisACT]

My last bike had one 35W halogen in it.  It was truly pathetic in terms of light output.  But we'll see.  With any luck, I'll be able to find a way of having enough grunt.

[LWC82PE]

yeah i know what you mean but there are some new type 35 watt globes that arent too bad. thats the advantage of AC, you have more power.

[ChrisACT]

I suppose the obvious thing to try would be to see what kind of stator and flywheel are on the FZR250.  After all, it would be able to power it's own headlights.  Maybe there is a way of adapting it to run on the DT2 crankshaft.
I have a complete FZR250 as a donor bike.  The engine is shagged.  Only 90psi in each cylinder after supposedly 34,000kms.  More like 134,000kms.  But not my problem.  Was a cheap donor bike.  Everything else on it is in great nick apart from a crack on one side of the fairing.  S'pose I should yank the ignition cover off it and see what's in there.  I doubt it would work but ya never know unless ya look.

[LWC82PE]

modifying/changing things to suit different crank tapers or changing crank tapers is possible. i know Betta Bikes has experience with that sort of thing.

[ChrisACT]

http://www.cmsnl.com/img/partslist/generator-fzr400a-1990_bigYAU1136C-1.gif

That's the generator from the FZR400.  I assume it would be very similar if not the same as the one on the FZR250.

It's the same style of flywheel as the DT2.  Just a matter of whether or not it fits.  Although, the FZR does rev to 18,500RPM.  The DT2 will be lucky to see anything north of 9,000RPM even with the fairly serious port job and pipe I plan to run on it.  Mind you, being a smoker, it won't often rev under 4,500RPM unless I'm stopped.

[Lozza]

Someglowing endorsements of "betta" bikes service CLICK HERE.Crank tapers are normaly a 12deg included angle just the diameter varies, so if you can count to six and set the compound slide on the lathe your half way there.
Ignitech's run DC/DC those German ones are HV types, beside you don't want to messing around with all that hi-tech stuff Leith,it will do your head in Might know where one of those TPS/Solenoid equiped carbs are Chris.

[ChrisACT]

Interesting, Lozza.  So, about this carb ..........   

[ChrisACT]

OK, really old thread here but progress is being made, albeit slowly.

I've been in touch with the lads at PowerDynamo (http://www.powerdynamo.biz/eng/systems/7238/7238dcmain.htm) over in Germany as to whether or not their DT250A kit will fit a DT3.

It's starting to look like it will.  Certainly the stator base plate will fit.  It's now just a matter of determining whether or not the rotor fits the crank.

But earlier in this thread the question was asked how much current will the new system crank out.  The website was a bit vague and had two different figures quoted.

Well, I have it from the horses mouth now.

They have two different rotors available.  They can provide an internal trigger or an external trigger.

So with the small rotor (103mm) and an internal trigger you get 100W
With the small rotor and an external trigger you get 150W
The large rotor (112mm) and an internal trigger you get 180W
The large rotor with an external trigger you get 220W.

The difference is mainly strength of magnets and that one magnet is missing for the internal trigger.

Oh and the exchange rate is slightly more favourable now than it was when I started this thread.  252 euros for the whole system is about $340 plus shipping.

[ChrisACT]

Problem solved.

My DT3 already has a DT250 ignition on it proving that they are interchangable, provided you swap both the stator and rotor over.  You can't mix and match.  The DT3 rotor has 6 small magnets.  The DT250 rotor has 4 larger magnets.  They are also slightly different diameters although they weigh the same.

Therefore, the Powerdynamo DT250/DT400 system will fit a DT1/DT2/DT3/RT1/RT2/RT3.

I'll be going for the 220W external trigger system.  I'll see if they can bung an extra dynamo coil in it seeing as I'm not going to use their magneto CDI and would prefer more 12V power to run the Ignitech system.

Worst case scenario, I'll have 220W to play with.

[Nathan S]

I'm two days too late (in the two year old thread...) to offer anything useful on the original questions, but I will say "what about fitting HID lights"?
Compared to halogens, they'll drop the elecrical power requirement to about one-third.

[ChrisACT]

I'm two days too late (in the two year old thread...) to offer anything useful on the original questions, but I will say "what about fitting HID lights"?
Compared to halogens, they'll drop the elecrical power requirement to about one-third.

Hey Nathan,

Yeah HID's could be an option except that the stock DT250 lighting coil only cranks out 30W at 6V.

I've got to do a 12V conversion anyway to run the ignition.  May as well have plenty of grunt while I'm at it.

Also, HID's are slow to react when switching from low beam to high beam.  And then there's the extra weight of the ballasts.  Not very heavy I know but I'm trying to make this bike as light as possible.  Plus I'd have to find somewhere to hide the ballasts too.