How do i set points and spark plug gap for a 1975 XS650B yamaha motorcycle?
Answers:
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check your owners manual ,if you don't have one. the internet is a great place for information. otherwize your local dealer will have the needed info. as a rule plugs are .020 an points are .012-.016 thousands of an inch. good luckTo set the points you need to take off the magneto on the side of the bike(small round piece that your able to turn with your hand)when you take the magneto off there will be two marks,one on the circular cylinder and one on the bike itself,match the two arrows up and it is set.
To gap the spark plugs you will need to go to your local auto parts store and buy a spark plug gapper which is only a few dollars,and also ask them what the gap is on you plugs,or you can cheat by just going to the auto parts store and buy pre-gapped spark plugs.GOOD LUCK!!!
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throw those points and condenser away,for about 100 dollars you can upgrade to electronic ignition!! Go to your local bike shop they can help you out.Much more reliable with the electronic.More Questions & Answers...