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87 XL250R Tach issue

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Installed a Vapor Trailtech the day before, everthing seems to work fine, but when I set the "Pulse per Revolution" to .5, the tach seems WAY off, which should be correct for a single cylinder. WHen I set to 1 ppr, that seems normal. I was careful to route the sense line away from anything it might pick up inductance from. So this leads me to believe it uses a wasted spark ignition system? Is this so or do I have issues eleswhere?

vapor.jpg

Just for grins, can anybody guess what bar I took this picture in?

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The ppr should be 1. That's what worked for me on my FT500 (XL500) single cylinder.

Thanks! After thinking about it I came to the conclusion that since its not a points bike it probabky has 1 pulse per revolution. Cheers!

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