tonyp Posted January 25, 2012 Report Share Posted January 25, 2012 Hi, I've recently got a Bultaco 198A. I believe the ignition timing is between 2.8mm and 3.0mm BTDC. I haven't yet got a TDC Tool, but I guess I'll need one. - are the standard tools OK, or do I really need a micrometer version ? But I was wondering... - what's this measurement in terms of degrees BTDC ? - I can't imagine being able to measure 2.8mm to 3mm with any great accuracy, so isn't it easier/better to measure in degrees ? Tony P Quote Link to comment Share on other sites More sharing options...
copemech Posted January 26, 2012 Report Share Posted January 26, 2012 Hi, I've recently got a Bultaco 198A. I believe the ignition timing is between 2.8mm and 3.0mm BTDC. I haven't yet got a TDC Tool, but I guess I'll need one. - are the standard tools OK, or do I really need a micrometer version ? But I was wondering... - what's this measurement in terms of degrees BTDC ? - I can't imagine being able to measure 2.8mm to 3mm with any great accuracy, so isn't it easier/better to measure in degrees ? Tony P No, if you do not have the good tool to begin with, you will never align a degree wheel. A vernier type works, dut a dial indicator is better! Quote Link to comment Share on other sites More sharing options...
monty_jon Posted January 26, 2012 Report Share Posted January 26, 2012 No, if you do not have the good tool to begin with, you will never align a degree wheel. A vernier type works, dut a dial indicator is better! As above, its worth investing in a good quality dial gauge Quote Link to comment Share on other sites More sharing options...
wayne_weedon Posted February 10, 2012 Report Share Posted February 10, 2012 2.8mm trigs out to 5.62 deg Quote Link to comment Share on other sites More sharing options...
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