bulto58 Posted January 10, 2015 Report Share Posted January 10, 2015 No wonder us old farts and our 70's bikes we own and ride , have got a hankering for the simple life . When I got my first Bultaco M 80 in 1976, I rode that bike to work every day on the road, trialed evenings and weekends, and when it needed fuel, go to my local esso station, gallon of fuel, 2 shots of oil from the big red oil dispenser gave about 30:1 from what i remember, Never had engine problems from that bike. 3 Quote Link to comment Share on other sites More sharing options...
burns1989 Posted January 10, 2015 Report Share Posted January 10, 2015 You have to check your plug it is the only indication to how you engine is running so if it's white I would jet it up one to two sizes at a time and check the plug it should be a biscuit brown colour. If your going from 50.1 to 100.1 it's a 50% cut I oil which will make it run rich but adding more oil can lean off the mixture . But its up to you what you do just don't kick some one down who is advising you. 1 Quote Link to comment Share on other sites More sharing options...
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