davey64 Posted March 1, 2014 Report Share Posted March 1, 2014 I'm just finishing of the 199a engine rebuild, put new points in & gapped them to 0.4mm. I've gone to set the timing & found that I can't get it set any closer than 4mm before top. The ignition is fully retarded, that is the backplate is fully turned anticlockwise up against the screws in the slots. I'm a bit stumped, has anyone come across this before? Dave. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted March 1, 2014 Report Share Posted March 1, 2014 adjust the timing on the points a little see if you can get to 2.5btdc with a smaller gap, its not critical as long as they have a gap. alternatively move the back plate. I always adjust my timing on the points btw. Quote Link to comment Share on other sites More sharing options...
davey64 Posted March 2, 2014 Author Report Share Posted March 2, 2014 Thanks Nigel, I'll give it a try in the morning. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted March 2, 2014 Report Share Posted March 2, 2014 I assume you marked the backplate before dismantling? Quote Link to comment Share on other sites More sharing options...
stevem75 Posted March 3, 2014 Report Share Posted March 3, 2014 Sounds like you've done it right. Point gap first then timing. I'd check how thick the points rubbing block is and compare it to what came out of the bike. It might be part of the issue. I'm always hesitant to make timing adjustments with gap only. The reason the gap is specified .4 mm is to maximize the life of the points and condenser. In any case I'd check the new points very carefully Steve Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted March 3, 2014 Report Share Posted March 3, 2014 changing points on a bulto is part of regular fettling, i wouldnt worry about life of them they will need changing pretty often. Quote Link to comment Share on other sites More sharing options...
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