Team GPR

[Bert]

I like it. Very interested to see how this goes.
We just bought in a couple of these http://www.ebay.com/itm/Complete-Rac...a41dac&vxp=mtr to power the ignis, would (possibly) go nicely with your CDI. Only problem is its the Honda taper so needs to be sleeved for our two strokes

Nice, yip one of them sitting in the workshop. Actually brought it to sit on the dyno to charge the stare battery, never happened.

Actually we were thinking of something like this
http://newmanz.co.nz/shop/index.php?...roducts_id=205



One could easily recut the taper to suit. But it would need to get 12v out of it?? New coil windings??

[mr bucketracer]

If we could get a batch of taper sleeves made then between Berts ignition and these generators that would be a really good basic ignition option.

can you post a pic so i can see what you want?

[mr bucketracer]

team gpr camp site

[jasonu]

team gpr camp site

Looks almost professional...

[Bert]

hummmm might be worth a looksee:

http://www.yoshimura-jp.com/en/topic/yd-mjn/index.html



24-28mm

[richban]

hummmm might be worth a looksee:

http://www.yoshimura-jp.com/en/topic/yd-mjn/index.html



24-28mm

Perfect for my C90. Bit small for an FXR. Also looks a little to mikuni for my liking.

[F5 Dave]

Yoshi & monkey bike? it just seems wrong.

Could be the go for my T125 Stinger


Nah, nah.std Dave, std.

[TZ350]

For a while now, I've been playing around with CDI's (to the point of even trying to make one myself).
Back in 2010 I got myself an ignitech P2 and fell in love with it (amazing value for money and recommend them to nearly everyone).

But; with over 9 bucket bikes in the GPR fleet (including 50, sidecars and some other gems); its a little to expensive to have ignitech's on everything, so we are stuck with the age old problem "shit CDIs" or swapping CDI's....

So as part of the my original search (2010) I stumbled across a Chinese MC forum where a young man named Dragon was prototyping a CDI; which I followed with some interest (along with some correspondence; and a simple wish list).
Attachment 291011

Attachment 291012

Its not an Ignitech (if you want that level of performance/features get an Ignitech);
But hopefully its better than a clapped out 20 year old MX CDI, which would likely still cost more...

http://www.ebay.com/itm/130463015746...84.m1423.l2649



The copper colored coils are for 12V DC 25 Watt charging circuit. The three High Voltage coils could be stripped off and the four other polls re wound for a total of 75 Watts 12V DC.

If we could get a batch of taper sleeves made then between Berts ignition and these generators that would be a really good basic ignition option.

can you post a pic so i can see what you want?

For us Suzuki engine owners we need an adaptor sleeve to fit between the 19mm (Honda/Lifan) flywheel and 16mm Suzuki crank taper.

[F5 Dave]

Looks interesting, but I'm sceptical of the output given that a CR250 with the 8 pole alternator & strong tricky magnets is rated at 40W

[Bert]

Looks interesting, but I'm sceptical of the output given that a CR250 with the 8 pole alternator & strong tricky magnets is rated at 40W

Turning in a bit of a syninic cynical lately aren't you Mr devconDave, Not very proactive and supportive....


So TZ, I'm sure I recall you covered the re-winding of your coils (within the ESE thread). What size core did you end up using and # wraps to achieve +50 watts. Rough calcs in my head thinking 1.8mm with 3 passes (but a long time since I needed to do those calcs).. Assuming the same type of alternator and magnet strength...

[mr bucketracer]

Mr devconDave lmao ha ha dam strokers

[husaberg]

Turning in a bit of a syninic lately aren't you Mr devconDave, Not very proactive and supportive....

Cynic or being Cynical.....Maybe that was the word you were looking for oh got it right first time without spekllcheck lol
sorry Brent.....

I was thinking re the Cotswold and the other alternator...... why not just swap out the center?

[TZ350]

Looks interesting, but I'm skeptical of the output given that a CR250 with the 8 pole alternator & strong tricky magnets is rated at 40W

You might be right to be skeptical, I was basing the 25Watt output on what I had been told and have not been able to verify it for myself.

But whatever it is, by re winding the other poles it can be maximized and from memory my Ignitec setup needs about 1.5A or 18Watts to run at full power.

We don't have one of these stators fitted yet but the definitive test will be light bulbs of various wattage and a voltmeter in parallel with them to see what sort of load the alternator can sustain. 50 Watts wont be enough for the fuel injection system but would run an Ignitec easily.

TZ, I'm sure I recall you covered the re-winding of your coils (within the ESE thread). What size core did you end up using and # wraps to achieve +50 watts. Rough calcs in my head thinking 1.8mm with 3 passes (but a long time since I needed to do those calcs).. Assuming the same type of alternator and magnet strength...

The KX80 flywheel I currently use is a bit bigger than the new Honda/Lifan one but has only two pole pieces. We used 0.8 wire, 1mm would have been a lot better but was to thick to get enough windings on easily. From memory, we had about 420 turns in total. I will have to re visit this as I never really got it working properly as it only put out 12V DC. The final AC voltage was not enough to cover the losses in the regulator rectifier and finish up with 14V for charging the battery. Maybe 60-80 more windings are required. Its to hard to calculate as you never really know the flux density so the most practical way is to suck it and see.

Ok we have fallen into a few traps for beginners. The flywheel on the left is 71mm ID and the one on the right 68mm, which means the poles are different sizes. And as magnetic flux and therefore voltage generated is affected by how close the pole is to the magnets in the flywheel a small pole in a large flywheel would give poor results if they were mixed up. We also added a smoothing capacitor for better measuring accuracy of the DC output with the digital Volt meter.

We have tried several coils and found we could get 100 turns of 1.0mm wire, 200 turns of 0.8mm or 410 turns of 0.6mm wire on a bobbin.

We need 0.8 mm wire with an area of 0.50mm2 and 420 turns for 14Volts DC at 2.5 Amps. So the only way to get anywhere near that, we will have to wind two bobbins with 410 turns of 0.6mm wire each, and wire them in parallel. That would effectively give us an effective 0.85 mm diameter wire for 0.57mm2 area, and hopefully that will give us the Voltage we want and handle the current needed.

Next week we will get Bucket to make them and see how it goes.......

[Bert]

Cynic or being Cynical.....Maybe that was the word you were looking for oh got it right first time without spekllcheck lol
sorry Brent.....

I was thinking re the Cotswold and the other alternator...... why not just swap out the center?

Nothing wrong with being corrected Husa...

[husaberg]

Nothing wrong with being corrected Husa...

Unless its from the guy with the worst spelling and grammar on KB.
I was asked to interpret and read out some notes, (i had written) the other day by one of the office ladies, Problem was even i couldn't read it