Author Topic: ignition timing on a K2F  (Read 1287 times)

Online kiwipom

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Re: ignition timing on a K2F
« Reply #30 on: 04.11. 2017 22:13 »
hi guys, Trevor when you say (manual end caps) what part are you referring to? if it is the ali end bit with the advance/retard on, that part needs the corresponding body as it is not the same as the auto advance body, DAMHIK, cheers
A10.G.Flash(cafe racer)Honda 250 vtr. Yamaha Virago XV920.

War! what is it good for?Absolutely nothing, Edwin Star.
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Online groily

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Re: ignition timing on a K2F
« Reply #31 on: 04.11. 2017 22:18 »
Good question Hubse -
If you mean that you should find the best possible position of the camring at full advance, and then set the pin's position, then 'definitely yes'.

If you mean the pin should simply be set to let the camring go as far as it can go in the advanced direction, then the answer would be 'no'.

What you want is the points to open just after the point of maximum flux change, the 'flip' point, of the armature, in the fully advanced position. If you were to set the camring limit pin as far 'advanced' as it could be, then there is the risk of over-advancing and losing the sparks, especially at higher rpm. The magnetic lines of flux 'bend' with speed, so what seems fine at low speed becomes a problem at high speed.

There is also, sometimes, the need for a small compromise to make quite sure that the plunger that operates the camring can not disengage from its notch either at full advance or at full retard. Wear on the plunger, and sometimes on the notch in the camring, can cause this - and sometimes it can happen where a camring has been replaced and the notches cut just a tiny bit out of position.

It won't make a huge difference if the pin isn't in the absolutely perfect place, but the nearer the better!
Bill

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Re: ignition timing on a K2F
« Reply #32 on: 05.11. 2017 00:57 »
hi guys, Trevor when you say (manual end caps) what part are you referring to? if it is the ali end bit with the advance/retard on, that part needs the corresponding body as it is not the same as the auto advance body, DAMHIK, cheers

You sure on that.
I am fairly sure I put a manual advance on my original A10 and all that got changed was the end and from memory some shims
Bike Beesa
Trevor

Online groily

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Re: ignition timing on a K2F
« Reply #33 on: 05.11. 2017 05:27 »
Think the confusion arose if the end housing was square, using 1/4" screws, as opposed to rectangular with 2BA (or vice versa). 
Housings from K2FC and K2F won't interchange, but like-for-like should be fine.
New housings aren't cheap, but there are some good CNC-machined ones out there, for the C versions anyway (not sure about the standard version).
Bill

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Re: ignition timing on a K2F
« Reply #34 on: 05.11. 2017 07:04 »
hi guys, Trevor just took some pics and as you can see they are different. I suppose you could make each fit the other if you were to drill/tap as required but these are the ones i have, also a couple that are not k2f, cheers
A10.G.Flash(cafe racer)Honda 250 vtr. Yamaha Virago XV920.

War! what is it good for?Absolutely nothing, Edwin Star.
NewZealand

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Re: ignition timing on a K2F
« Reply #35 on: 06.01. 2019 08:48 »
Jools, these are the ones that I have do you have a corresponding mag body to take the same one as the manual one in the pic ,cheers
A10.G.Flash(cafe racer)Honda 250 vtr. Yamaha Virago XV920.

War! what is it good for?Absolutely nothing, Edwin Star.
NewZealand