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Title: CDI on XL250
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routeinfo
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(Date Posted:04/09/2004 7:26 AM)

Hi all, has anyone ever tried puting a cdi from an early 80's atc185-200 on a sideport xl? It looks like if the advance fits the end of my cam I can make the rest work. Any thoughts?
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Oldrice
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(Date Posted:04/09/2004 7:34 AM)

Reply to : routeinfo
Hi all, has anyone ever tried puting a cdi from an early 80's atc185-200 on a sideport xl? It looks like if the advance fits the end of my cam I can make the rest work. Any thoughts?

I don't see why you couldn't if you really can adapt it to your cam. Am I missing something too? Seems like it would work. Bob?

Geoff-

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Oldrice
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bob__
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(Date Posted:04/09/2004 8:10 AM)

way over my head here---seems like the kind of thing I've heard Swiss, overbore chris or oregon trail talk about--
and I think they were always talking about XR200s, early 80's type--also names like motoplat---

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deltas69
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(Date Posted:04/10/2004 2:58 AM)

Reply to : bob__
way over my head here---seems like the kind of thing I've heard Swiss, overbore chris or oregon trail talk about--and I think they were always talking about XR200s, early 80's type--also names like motoplat---

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deltas69
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(Date Posted:04/10/2004 3:01 AM)

somewhere on the old board, there was mention of a simple electronictrigger thingy called a "MAGNA  SOMETHING".can't remember the last part, or what i had for lunch either,.but i digress..seems like you find it at lawnmower shops and it adapyts easily to the xl's...i read about this somewhere else also i think.or am i nuts and dreaming?? anybody else remember this????

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Swiss
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(Date Posted:04/11/2004 6:29 AM)

Ignitions for the XL engines are varied and many.  Some are a lot easier to find than others.  First of all, we have the stock points.  Then we have the ARD magneto wihch was commonly sold for the XR75 but evidently was also marketed for the XL250-350s.  I recently saw one on an  Ebay auction.  It was basically a small diameter, internal rotor 2-stroke style magneto without an adjustable advance.  Then there was the BCI CDI ignition that Powroll sold for a couple of years.  It was a plug-in unit that completely replaced the points and had about a 15 degree electronic advance (the result of circuitry variation with changing rpms and resistance/capacitance in the circuits, common in many of the electronic ignitions).  Then there were the Martek/Mototek CDI units, these were offered in 3 different versions for the Honda XLs.  One was a plug in like the BCI that would work with the stock type magneto, another was a similar unit that included a built in coil, and the third was a non-coil unit that had an electronic trigger unit that replaced the points.  This third unit allowed you to use the stock advancer unit to control the timing.  That was in the old days of the '70s.  In the early '80s Honda came out with various versions of a factory CDI system.  The one that is most adaptable to the XL engines are the units off of the XR185/200 engines and the small 110s and such of the different 3 and 4 wheelers.  The early XR500/250 unit would also be adaptable, but it uses a crank driven advance unit/trigger and so would be easiest to set up with a fixed advance.  One of the guys in Australia was the first one that I know of that did a successful ignition swap from an XR200.  It is a little tricky, I haven't done mine yet but I do have the parts.  You need to cut a new notch in the trigger rotor 180 degrees from the XR200 notch in order to mount the sensor at the correct position. 

Swiss
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(Date Posted:04/11/2004 6:31 AM)

Forgot to mention that the small ignition that was said to be a Magna was a Briggs and Stratton ignition trigger unit.  It was discussed and I probably have the info printed out somewhere in my files, but it is well buried.  Don't know if one was successfully used or not.

Swiss
routeinfo
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(Date Posted:04/12/2004 2:41 AM)

Wow thanks Swiss, that's great info.

I had more or less decided on the atc185/200 stuff because it is so readily available. I'll look closer into it this week and see what happens. I did have a look at an atc185 wiring diagram and it looks very straight forward. There are 6 wires on the cdi box, 2 for the pulsor, 1 ground, 1 to the ignition coil, 1 to the kill switch and ignition switch and 1 to the black wire from my alternator. As I recall it is important to use the kill switch wire from the cdi box connected to the bk/w in the harness and connect the bk wire from the alternator directly to the bk on the cdi box.

Thanks again

Pat

 
fletchtim
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