mechanic123 Posted February 17 Report Share Posted February 17 Looking for some help. 1971 Bultaco Matador SD 250 wouldn't start. I got 130 psi compression with new crank seals, piston rings and cylinder honed. Got fuel and spark as well. Been messing with timing trying to get it to start but it shows no signs of life. Any ideas are much appreciated. Quote Link to comment Share on other sites More sharing options...
stevem75 Posted February 19 Report Share Posted February 19 If the bike has not run for many years it could be really loaded with cruddy old fuel and undesirable sludge in the bottom end. I recently mildly refurbished an Alpina that was a tough go. It had a freshly cleaned carb, new seals and gaskets, new plug and proper timing and it still took probably 100 kicks to get it going. In between I was cleaning the plug and trying to use compressed air to clear things out. Eventually I got it going and now all is fine. You may have the same problem. Youve covered your basics so I’m sure it’s just perseverance from here Quote Link to comment Share on other sites More sharing options...
mechanic123 Posted February 19 Author Report Share Posted February 19 Seems that way I've been kicking my guts out forever. Quote Link to comment Share on other sites More sharing options...
sherpa325 Posted February 20 Report Share Posted February 20 Try a new condenser, notorious for giving a spark when turned over by hand but break down under load 2 1 Quote Link to comment Share on other sites More sharing options...
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