speeedee Posted May 16, 2010 Share Posted May 16, 2010 I am restoring a 1982 DT80 (5J2 engine) which is mounted in a later (2FN) DT50MX frame. My problem seems to be that, once engine warms up after 5 or 10 mins riding (field bike) it begins to splutter, idle becomes eratic and dies on me. I had a non standard carb on, when this first happened and found that the spark plug had given up after only an afternoons riding. The carb I now have on is from a later model (12X), it runs much better, but again after 10 mins the old symptoms came back. (The plug chop showed good results both times) I have so far replaced plug, HT lead, coil, condenser and points with original (5J2 parts). Could it be ignition source coil breaking down when warm? Is replacing points ignition to electronic ignition (from DT50MX) straight forward, as I have it from donor bike? Any one have experience of conversion or recognise symptoms? It's driving me mad.... Link to comment Share on other sites More sharing options...
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