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Bike won’t start.

Idontknowcrap

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I bought a bike recently and only got 1 decent ride
And then i started having problems. I put brand new battery. But the lights are extremely dim to almost nonexistent. Engine turns but it won’t fire up.
 
So, I'm guessing it's a CB750K(F)2? Sometimes new batteries aren't fully charged, but the lights being dim and now it won't start indicate perhaps a wiring issue. On an older bike, it is good practice to go through all the ground and positive connections (switches too) - clean them and check for tightness. Bad connections - both positive and ground - create resistance and prevent the proper flow of current.

After that exercise, remove one of the spark plugs, ground the threads to the head, crank the starter and see if you're producing spark.
 
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