XS650 - igntion coils

[Tony oily bike]

Had a problem with the ignition on an old XS650 which me a my mate Dslam were working on.

The bike would run/ride all OK,  then the engine would stop an refuse to start. Take the plugs out and no spark.
The bike runs Lucas Rita electronic and these can be voltage dependant, so check voltage, connections etc, all appears AOK.

After a period of time the bike would start (without us doing anything to fix the issue). mmmmm???

It turned out (as best we could tell) that the coils were failing when they got warm, so a twin-ouput  (wasted spark) Dyna-coil was fitted, which gave the juiciest spark you could wish for, however mounting it to the bike needed a bracket of some kind.

The answer was quite simple. Piece of Al/Dural (about 8 - 9mm thick) as shown. The bracket not only securely mounts the coil, but also acts as a heat sink, as they can get warm.

A point to note with these dyna coils is that they should only be 'used' with plugs connected/grounded as serious damage to the coil can result otherwise.

So if any of you find a similar problem with your 30/40 year old coils, this could be a way out.

http://www.dynatekuk.com/


Piccie shows original coils

[Tony oily bike]

Original coils

[Tony oily bike]

New dyna coil and bracket

[Tony oily bike]

New dyna coil and bracket (other side)

[Manky Monkey]

Hoping mine will be O.K, when I eventually start my XS project, but just out of interest Tony, how much?

[Tony oily bike]

Hoping mine will be O.K, when I eventually start my XS project, but just out of interest Tony, how much?

According to the website it looks like about £74  (but I'm not 100% sure off the model ref, just going by the fact that's it a 3 ohm 'green'. They colour-code them).
Here's the price list.
http://www.dynatekuk.com/accessories_dyna_coils.html

The one in the piccie was bought new & unused from a Brit bike shop owner who, when he bought a Norton Commando, also got it in a box of bits for an ignition upgrade from the owner that included the coil (new but never fitted).
Think that one cost about £25  , which is ball-park price for a normal second-hand coil at a jumble.

ebay has them every now and then, but often in pairs. The high performance brigade use 'em lots. Price for new on ebay often is the same as the price in the above price list.

[madkitten]

i fitted 2 twin output dynacoils to my old gixxer as an upgrade and yer they give a great spark. but they have caused me a different problem now . i got a mapped ignition module and now when changing gear at high revvs i get ignition drop out and have to dethrottle wait a second and it will then revv up again. its the voltage surge, buggin it . and now starting to melt my loom and reg rec. there big and put out big spark but need big power in

[voodoo]

Try these if you need any ignition parts... http://www.boyerbransden.com/index.html
Heres a link to the XS 650 set up..
http://www.boyerbransden.com/micro_power_digital_ignitions.html
Ive had Electronic Ignitions and Dyna coils off of them for several bikes/Trikes over the years....Voodoo.....

[triker_Chewie]

i fitted 2 twin output dynacoils to my old gixxer as an upgrade and yer they give a great spark. but they have caused me a different problem now . i got a mapped ignition module and now when changing gear at high revvs i get ignition drop out and have to dethrottle wait a second and it will then revv up again. its the voltage surge, buggin it . and now starting to melt my loom and reg rec. there big and put out big spark but need big power in

Up the gauge of the input cable

[madkitten]

wish it was that simple the wires are everywhere in the loom . did think of that that decided too hard and that i would get a new main wiring loom