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

[ChrisACT]

Hey there,

I'm building up a DT2 engined road bike and I was wondering if anyone has ever converted a DT2 engine to 12V electrics?

If so, what did you have to do to it?

Regards,
Chris

[vandy010]

i'd imagine Chris, that you'd just source a later model DT/cdi/stator/flywheel set-up and the rest would kind of fall into place. although my advice/experience ain't worth too much when it comes to lights/indicators and rego~legal stuff as i usually rip all the lights off my bikes and keep em simple.
 

[ChrisACT]

Fair enough.  Didn't realise the later ones were 12V.  I thought they were all 6V.  That makes it easier.  I was hoping to put something a little more grunty on it though.  Would be nice to have lights that actually help when it gets dark.

Anyone know if an RZ350 flywheel would fit on the crank?  It's the same style of flywheel.

The ignition is going to be a programmable unit anyway so the CDI is not an issue.

[LWC82PE]

have a look here,

http://www.powerdynamo.biz/deu/systems/lists/yamaha.php
http://www.roadandraceignitions.co.uk/
http://www.rexcauntracing.com/pages/ig_bsa.html

I would recommend the Power dynamo/MZB systems as I have fitted them to bikes before and they are very high quality. Although there isn’t one listed for your exact model the later DT kit may fit or if you can have a good read of their site, they say they can make a system for you if you provide them with some information.

How much power do you need?

If you just want a 12 volt light then quite simply stick a 12 volt AC regulator on and that’s usually all you need to do.

If you need 12 volt DC to run a DC ignition, then that’s an entire different kettle of fish. You DT would most likely not have enough power to efficiently run a DC system and a 12 volt regulator/rectifier so you would need coils rewound for more out put, or a different stator or even a better flywheel.

I would highly recommend www.bettabikes.com they will have answers for you and can even build you a system from scratch or modify your existing one.

having mucked around with suzuki electics for a while, i have found most of the crank tapers are the same, so the yamaha DT crank shaft ends could also be the same for most of the range.

[ChrisACT]

Thankyou.  That's very helpful.

I'm looking at running a 12V ignition and twin headlights from an FZR250.  I would also like to be able to run high wattage bulbs than stock so I'm looking for something with substantially more output than stock.  I'll run LED indicators so that will reduce the load when they are operating but the headlights and ignition are the big ticket items for current draw.

[Tim754]

Cannot find a listing with 12v electrics for any Australian DT250. The early AT2 125s had 12v due to their electric starter.

[mx250]

Cannot find a listing with 12v electrics for any Australian DT250. The early AT2 125s had 12v due to their electric starter.

A big heavy starter/generator .

[Lozza]

DC to DC is the way to go, maybe a YZ 125/250 with the electrex stator, rec/reg and battery. Just what are these programable ignitions you speak of.............................

[ChrisACT]

The Powerdynamo system that LWC3077 linked to cranks out 180Watts (which would be plenty) and fits the DT250A.  The DT2 runs the same crankshaft (according to the microfiche it's the same part number anyway) so it should fit the DT2 crank.

The programmable ignition system I'm planning to use is the Ignitech system.  This guy I know reckons they're tops but I'm still waiting for him to organise a group buy on them.   

I'm also looking at using the 2000-2001 YZ250 38mm carb.  It has a TPS and electric powerjet which the Ignitech system can interface with.

[LWC82PE]

which was the powerdynamo kit you were looking at?

[mx250]

The programmable ignition system I'm planning to use is the Ignitech system. 
I'm also looking at using the 2000-2001 YZ250 38mm carb.  It has a TPS and electric powerjet which the Ignitech system can interface with.

All on a poor old humble DT

Let us know how it all goes.

[ChrisACT]

http://www.powerdynamo.biz/eng/systems/7238/7238dcmain.htm.  The original listing says 100W but then it reckons it's 180W.  I dunno.  Maybe it's only 100W.

It's listed as a DT400 kit but then says "should equally fit DT250A, DT360A, DT250B, DT250C, DT400C and possibly MX360A, MX360B, MX400B, MX400C (but this remains to be confirmed). "

[ChrisACT]

The programmable ignition system I'm planning to use is the Ignitech system. 
I'm also looking at using the 2000-2001 YZ250 38mm carb.  It has a TPS and electric powerjet which the Ignitech system can interface with.

All on a poor old humble DT

Let us know how it all goes.

It's sort of a DT.  A bit of a road project.  I think it's fair to say that the only DT parts on this bike will be the engine, frame and maybe the swingarm.  The wheels, front end, brakes and headlights will be from the FZR250.  So, it'll be a bit of a Frankenstein bike.

[LWC82PE]

ok gotcha. yeah with the 70AC vs 100 watt system they reckon the stator is the same but just the regualtor is different? it doesnt make sense unless the regulators are regulating what is comming out of the stator. its sounds like the 100wDC/70w Ac are just quoting what regulator they come with and what they are regulated to. Normally the AC out put would be more than the DC. rectification to DC typically equates to power loss of 1/3,so if they have a stator that produces 100 watt DC therotically it could produce 150 watts AC. this is what i want to ask them as i prefer a AC light system and i want ask if i buy any of their 70 or 100 watt systems, what is the raw AC output, so then i can fit my own higher rated AC regulator.

do you have a website for the Ignitech system?

ahh found it easy

http://www.ignitech.cz/english/aindex.htm

[LWC82PE]

im wondering how your going to combine the ignitech programable CDI with the power dynamo system? the power dynamo system from what i can tell uses a all in one CDI unit and ignition coil? its a bit hard to tell, i would like to see detailed wiring from the each coil on the stator. Maybe you can get them to build a system with out ignition side of things and to use the ignitech ignition system?