The Mut

**kel** · 8th March 2012, 14:10

Originally Posted by koba

I've started on adapting the KX125 Ignition I brought.

It's handy that the taper is the same. (I must double check that though, I have only had a quick look.)

There is only one way the pulse-coil/signal generator thingy will fit in the cases so I will put it there and move the position of the rotor on the crankshaft.
It looks like it will sit in the right place, or close to it, if I un-rivet the centre of the rotor, move it around 2 holes and rivet it on again.

I should probably take some photos to jazz this thread up a bit.

I have the complete 1988 version (stator/rotor/cdi) which has the in built pulse coil i.e. pulse coil mounted to the inside of the rotor rather than outside. We could do a swap, save you butchering the other one. Will bring it down to Tepuke for you to have a look at.

**koba** · 8th March 2012, 21:27

Originally Posted by kel

I have the complete 1988 version (stator/rotor/cdi) which has the in built pulse coil i.e. pulse coil mounted to the inside of the rotor rather than outside. We could do a swap, save you butchering the other one. Will bring it down to Tepuke for you to have a look at.

Would be interesting to have a gander at it. I've got the rotor-puller packed up so we could actually see how it looks in the cases too.

I don't think the one I have already will need too much butchering, just clocking the centre around so the key-ways line up. The key-ways are different (narrower on rotor) but I understand keys can be made to suit.

**koba** · 12th March 2012, 14:48

Originally Posted by kel

Will bring it down to Tepuke for you to have a look at.

Too much going on, as frequently happens I didn't remember half the shit I was meant to do, including actually talking to you properly about that.
I don't seem to recover from distractions well.

Should be sweet working with the one I've got now anyway.

**husaberg** · 10th June 2012, 22:43

Update on Mut Kobas....

**koba** · 11th June 2012, 07:20

Originally Posted by husaberg

Update on Mut Kobas....

I've had it running on a new ignition.
It's hard to judge the changes from a quick blat up the street so I'll know more after Sunday...

**F5 Dave** · 11th June 2012, 09:27

This is going to make it harder to keep up with, the progress has been certain

**koba** · 11th June 2012, 20:11

Originally Posted by F5 Dave

This is going to make it harder to keep up with

I hope it does. Still, the goalposts are moving a lot faster than my forward progress...

I am glad for the marked improvements.

**koba** · 21st June 2012, 22:36

Righto, finally.

Sunday.
I started with the ignition at a real rough approximation of that standard firing point.

It was really hard to gauge changes in the icy conditions but in practice and race one it felt heaps more responsive over the lower half of the rev range but then it seemed to hit a wall higher up.

I retarded it rough as all hell to about 1mm retard on the OD of the stator plate.
It revved better but lost some crispness in the low-mid range.

Retarded about the same amount again later on and it got a bit harder to start.
Power started to get quite smooth but I'm sure it lost a bit in responsiveness.

I crashed 3 times and the conditions were a bit shit so I'm going to have to do some more testing before I decide on the best timing setting to use.
Still, the improvement was really noticeable with a MUCH lighter rotor than the standard MB100 one.
I suspected it may have made it harder to ride in tricky conditions but really it's increased responsiveness made things easier than before.

**kel** · 21st June 2012, 22:51

Good news. If you do a google search on "kx125 ignition timing Eric Gorr" you should find some handy info on setup, your ignition is from a 1990 if memory serves me correct.
or try this link if it works http://books.google.co.nz/books?id=k...page&q&f=false

**koba** · 21st June 2012, 22:56

Originally Posted by kel

Good news. If you do a google search on "kx125 ignition timing Eric Gorr" you should find some handy info on setup, your ignition is from a 1990 if memory serves me correct.
or try this link if it works http://books.google.co.nz/books?id=k...page&q&f=false

I could read that. I've actually had a read of that book too (cheers Dave). It makes sense; it relates very closely to what I felt.

I know an Ignitec or similar would be just the go to get the optimum all the way through the range but the budget is tight and falling to zero as I'm soon to be unemployed.

**husaberg** · 21st June 2012, 23:12

Originally Posted by koba

I could read that. I've actually had a read of that book too (cheers Dave). It makes sense; it relates very closely to what I felt.

I know an Ignitec or similar would be just the go to get the optimum all the way through the range but the budget is tight and falling to zero as I'm soon to be unemployed.

Have you rung about the top secret job

**koba** · 21st June 2012, 23:18

Originally Posted by husaberg

Have you rung about the top secret job

I could tell you but then I'd have to...

No, not yet, I've been juggling a lot of stuff at the moment, and just to make it easier I've contracted a lungful of coughs.