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there is supposed to be an air gap between the sensor and the rotor so if it is wearing out then the gap is not there. This will also be a problem for the running
If it is just one plug that is fowling (oil or fuel) the go to a spares shop and get a hotter plug to burn off the fowling
Plugs come in heat ranges from cold to hot and are used specifically when problems occur.
also replace that HT lead as they break down in the centre and don't fire properly
does it backfire when revving down? are your spark plugs coming out black? if yes, you need to lean out your system a little by adjusting the mixture screw on the carb.
Take the carb back off and adjust the float in bowl to spec.If you don't have spec just adjust till fuel stops overfowing an go with that.Yeah, it might take a few times.
You need to change the spark plug here say if it is a BR 8ES (NGK) then move on to BR 6ES and if that fail then move to BR 10ES..I use to do racing and its to do with playing with that until it is sorted..Now you may also have a faulty coil, faulty spark plug cap or something else here.It may not necessarily mean it is the spark plug.
the mixture may be too much one of two things you can do
1) switch to synthetic oil mix or
2) go to a hotter plug it will last a little longer but will still foul
You need to ensure that your fuel/oil mixture is correct. Roughly between 40:1 and 32:1. Usually if you mix is off, it will foul plugs quickly. You can also get a compression test and if it fails look into getting a top end done. Any motorbike shop will be willing to do it and is generally inexpensive. It would be cheaper to do it yourself, assuming you are somewhat mechanically inclined and have the service manual. Good luck.22
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