johnh Posted March 29, 2010 Report Share Posted March 29, 2010 (edited) Ok then I am rebuilding my 1980 Montesa 123 and i have replaced the points, condensor and all the wires from the stator. I replaced each wire as I took one off so I am pretty sure that it is wired correctly. I set the points and kicked the engine over - no spark. So i set about setting the timing using a dial gauge and ohmeter. Connecting one probe from the ohmeter to the single LT wire going to the coil and the other to an earth I get a constant beep. I tried all of the other 3 wires and got the same constant beep, I also tried different earth locations with the same result and still no spark. Any ideas what I could be doing wrong? Cheers Edited April 10, 2010 by JohnH Quote Link to comment Share on other sites More sharing options...
motovintage Posted March 31, 2010 Report Share Posted March 31, 2010 (edited) ohm reading on the source coil? try a known good ignition coil Edited March 31, 2010 by MotoVintage Quote Link to comment Share on other sites More sharing options...
stork955 Posted March 31, 2010 Report Share Posted March 31, 2010 Gday, did you give the points a clean before fitting? Often they have a film of protective oil/stuff on them when new, and you do need to give them a clean with some solvent first (Just on the contact area) Also, make sure you have a small dab of grease on the rubbing block too- not too much though! Cheers, Stork Quote Link to comment Share on other sites More sharing options...
ikb Posted April 1, 2010 Report Share Posted April 1, 2010 I think you need to disconect the source coil when setting the timing with a multi meter as the coils have a low resistance. Also there are 2 source coils you can use for the spark as I had no spark on my 200 and after specking to Bradford Ignitions he sugested I try the other coil and instant spark. Unfortunately I cant remember which coil was which,I think they both have similar size windings. You could give bradford Ignitions a ring or have a look at www.uk-motoplat.com. Ian Quote Link to comment Share on other sites More sharing options...
johnh Posted April 6, 2010 Author Report Share Posted April 6, 2010 Thanks for the advice fella's, I now have a spark. Ihad to take the engine out of the frame and clean up the mounting points so that there would be a decent earth. Found this out from Southwest Montesa. Cheers Quote Link to comment Share on other sites More sharing options...
johnh Posted April 10, 2010 Author Report Share Posted April 10, 2010 Put the bike back together yesterday and she fired up 2nd kick. Just need to finish sorting and painting tank/seat unit then I can take her for a spin. Quote Link to comment Share on other sites More sharing options...
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