Hann
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Registration Date: 31-07-2018
Date of Birth: Not Specified
Local Time: 19-01-2021 at 03:31 AM
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Joined: 31-07-2018
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RE: 1988 DR750 Big rebuild 1
Thread Subject Forum Name
1988 DR750 Big rebuild DR750
Post Message
I`d somehow missed the fact that you`ve rebuilt the whole motor so if there was anything seriously amiss with the top end i`m pretty sure you would of spotted that at rebuild time..... Doh.

Do you think the spark is cutting out at these low engine speeds?
One of those plug caps with a light built in might be of use?
I was going to suggest a few quick electrical tests next but it seems you`ve already done them?
Coil primary is very low usually - about 1 or 2 Ohm.
Coil secondary 10 - 17KOhm. Thats quite a wide tolerance. I wonder whether that includes any plug cap resistor? I`d remove the plug cap to the check secondaries.
Pickup/pulser coil resistance 175 - 265 Ohms.
CDI power source coil - 230 - 355.

I recently had an NX650 Dominator which was a bitch to start but once running was fine - cause was a failing/tired CDI unit, luckily only 20 quid pattern part.