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timing v50 with bosch unit

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bob.w View Drop Down
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    Posted: 30 Oct 2017 at 19:11
I read and read and have manual. The pictures suck. I'm restoring a 1980 v50 II and rebuilt rear diff and trans now I'm putting back together the motor. I put in the pick up's and set it at .30mm but also see the pick up move not just up and down but side to side for advance and retard.. did they have a tool from the factory to put it on the right way and setup. I cant see them setting up timing at the end of the production line with a guy with timing light trying to set up timing- he would jam up the line.. they must of have a tool that gets it somewhat perfect. I cant see it they are running the bike with the alt off and adjusting the pick up's coils????? I was reading way the went back to points after that set up.. When I took mine apart I found them very loose and bike only has 1300 miles on it.. thanks guys'
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Simmoto Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct 2017 at 06:29
There is a tool but I haven't see one and not sure how good it is. With feeler gauges and trial and error I got reasonable results. Absence of a full set of timing marks doesn't help, I tried a timing wheel and made my own to check max advance but it was a lot of trouble and same as static timing. I didn't like the Bosch pick ups most of all theignition curve that was supplied to several manufacturers and can't be right for them all! The later points bike curve is quite different, more linear. Aftermarket electronic ignition an option; silent Hektik or Sachse two possibilities
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Brian UK View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct 2017 at 08:13
A Silent Hektic system will double the value of the bike. Wink
 
I set up the same model with no special tools, then checked with a strobe and timing disc, worked fine. The important thing is to get both set accurately regarding rotational position and the air gap. The air gap to some extent, controls the point at which the advance happens, so if the pickups are different you get an odd flat spot where one pot is retarded, the other advanced.
Brian.

Better 5 minutes late in this world than years early in the next.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote cyclobutch Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct 2017 at 09:26
Yeah – the manual shows a tool. Never seen one in the metal. I remember someone out here in forumland somewhere talking about 3D printing some – can’t remember where or who though.

 

Without it you are stuck with having to adjust the pick-ups to get the timing right and at the same time keeping the air gap between them and the trigger just right. With no fine tuning it is a real hit and miss affair. You need to put by a couple of hours to get it done right. It can be done, and the bikes will then run nice – it is important that the air gap betwixt trigger and each pick-up is the same.

 

I’m investigating a missing spark on my mk II at the moment and dread the thought of having to disturb the pick-ups if the problem lies there. This dialogue has me thinking that I could at least turn up a sleeve to manage the air gap during adjustments. Maybe. 

Butch
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bob.w View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bob.w Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 19:12
thanks guys for the reply.. when you guy's got the motor running  real good- what did you guy's put the air gap too? I look in aftermarket one's- they look very good.  500.00 us.d shipped - I wish the us.d was worth something now a day's..  I might do it - because this will be my weekday runner and keep the big heavy Harley in garage for the weedend with the wife..
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 01 Nov 2017 at 22:09
Just stick to the book values. Provided both are exactly the same, it works as well as it can.
 
You could spend $500 on an aftermarket unit and probably not notice the difference (apart from in your bank balance). Remember this is not a high performance race engine.
Brian.

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