MRC Forum- brought to you by www.morini-riders-club.com Member: g7AW3f

i keep having the same problem - the bike starts fine on the first couple of kicks but the after a short running time it goes on to one cylinder and refuses to play any more - any ideas - thanks -= duncan

This happened to my sport when the pickup was on its last legs. It only takes a second to pop the cover off and have a visual check- any cracks in the resin potting are likely to mean the pickup is (or is about to) go belly up.

George Lane fixed and repotted mine for relatively little cash.

If not the pickup then i think it's a case of either substituting ignition components until you find the problem (expensive unless you have a big parts stash) or going over everything with a multitester (there will be more knowledgeable people on the forum than me who can tell you what to look for)

best of luck finding the problem

a quick look without removing it and it looks ok no sign of cracking - thanks - duncan

Dunk

As Tom suggested swapping the ignition parts will help pinpoint the problem. Is it always the same cylinder failing?, if so swap the transducer boxes round that connect to the spark plugs. If the fault moves to the other cylinder it is more than likely the transducer, if it stays where it is then the pickup is suspect.

Regards

Robin

If it starts OK and then goes on to one cylinder after a short while (once the engine is hot?) then the pick up is a possible cause.

As Tom describes, a crack in the resin is a good indicator - bit it might not be visible, as I had this problem and we had to remove the pick-up to find it. However, this was many years ago when Stradas, etc., were still at dealers.

Good luck, and let us know what the problem is / was...

CC

took the pick up off completely and there still seems to be no problem - it was grooved slightly but no cracks - now for the silly admission i forgot to check which way around the rotor came off the end of the cam and it can go in two positions, there is a mark on the end of the cam - does this go toward the open part of the rotor? there is also a large mark on the rotor which doesn't seem to align with anything?
thanks - duncan - incidentally it sems that the bolt holding the pick up and the black wire was very loose -could this have an effect - anyway it's about time i stopped being scared of electrics and started to work my way through the system.

Magnet:
Set cylinder 1 onto compression - with flywheel cover off you will be able to see which cylinder is at TDC, and the cut outs in the magnet should point to the front of the engine.

Black wire not tight: This won't help with your misfire, as it is the earth wire for the pick up. The pick up only generates a small voltage - about 5V from memory, (happy to be corrected) so any resistance due to a loose connector isn't good. If your pick up is the red one and has gone bad, beware early and late types, as they had different magnets, one with bigger slots than the other.

Hope you fix it,
George.

Further info and pictures of transducers can be found at
http://www.motomoriniclub.nl/tech.html