2k-2 to 2k-3

[siaknijustin]

What is involved in swapping from a 2k-2 to a 2k-3? Is it just the stator or are the flywheels different as well? I thought that I would like the 2k-2 but now having ridden both ignitions on an EC 300, I'm finding that I want more flywheel effect and some increased juice for the headlight would be welcome as well. Any insight from the enlightened would be appreciated. Thanks.

[GMP]

Its a flywheel/stator combination. 2K-3 is much larger in dia. The cases are drilled and tapped for both systems at the factory.

[siaknijustin]

Originally Posted by GMP

Its a flywheel/stator combination. 2K-3 is much larger in dia. The cases are drilled and tapped for both systems at the factory.

Ya, I've noticed that on 2K-3 equipped bikes that the wires come out
Of the cases near the slave cylinder and on the 2K-2 equipped bikes they
Exit the cases near the front of the cylinder. I guess that means I need to
See if someone wants to trade. Seems that I better get in line as there have
Been a few wanting to trade 2K-2s for 2K-3s.

[bowhunter007]

Is one really more desireable than the other? Is it just the output that is different, or does one generally outlive the other? This thread prompted me to check both of mine...I have one of each. Is it known if the 2k-2 or 2k-3 flywheel/stator combos are used in any other brands, or is it GG specific?

[siaknijustin]

My understanding is that the larger 2k-3 has a higher electrical output and a heavier flywheel. I'd be surprised if one was more durable than the other. My father-in-law's '03 has the 2K-3 and my '05 has the 2K-2. Where my father-in-law's bike doesn't have a headlight installed I couldn't verify how much brighter it might run a stock headlight like the one on my '05. I can verify that his has greater flywheel effect and is less prone to stalling despite that fact that he still has stock gearing and I'm currently running a 52 tooth rear sprocket. We ride lots of steep loose terrain and I could see the greater flywheel effect of the 2K-3 being beneficial to me. A little extra stator output would just be a bonus.

The 2k-2 being lighter does allow the motor to rev quicker. If I was a racer and not just a casual trail rider there's no way I'd prefer the 2k-3.

I think that the KTM's run similar Kokusan ignitions.

I have posted in the appropriate section that I would be willing to trade my 2k-2 ignition assembly for a 2k-3 if anyone is interested. Regardless of whatever ignition I end up with I'll probably add a flywheel weight (I'll just have to add a heavier one if I stick with my 2k-2).

Someone please correct me if I'm teaching false doctrine!

[siaknijustin]

Originally Posted by siaknijustin

I have posted in the appropriate section that I would be willing to trade my 2k-2 ignition assembly for a 2k-3 if anyone is interested. Regardless of whatever ignition I end up with I'll probably add a flywheel weight (I'll just have to add a heavier one if I stick with my 2k-2).

This brings up another question...are flywheel weights generally interchangeable between the two ignitions or are they ignition specific?

[bowhunter007]

Originally Posted by siaknijustin

My understanding is that the larger 2k-3 has a higher electrical output and a heavier flywheel.

My '03 250 has a 2k-3, my '01 XC has a 2k-2, my '01 300 has a 2k-2. My '03 has no trouble powering up my Trailtech light, on hi-beam.

[siaknijustin]

I may have a line on a 2k-3. Has anybody actually swapped ignitions? If so, are there any other parts required such as a CDI or do you just swap the ignition/flywheel combo, plug in the wires and enjoy the newfound flywheel effect?

[slocalspode]

Originally Posted by siaknijustin

I may have a line on a 2k-3. Has anybody actually swapped ignitions? If so, are there any other parts required such as a CDI or do you just swap the ignition/flywheel combo, plug in the wires and enjoy the newfound flywheel effect?

There is a oval washer / shim called "Ignition centerer"
Shown in the lower picture in this post:
http://www.gasgasrider.org/forum/sho...65&postcount=8

I can't figure out how to take a screen shot of the engine parts manual I have.
Or I'd show the exploded diagram.
It is part ME25934025
I needed to order one when I did the 2K-2 to 2K-3 swap on my XC300.
There are several posts about how to do the swap, and to do the floating
ground (or not) if you want to add a battery.
Good luck, Jeff

[siaknijustin]

Thanks, Jeff. I'll get one on order and do some more thread searching.