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Hi guys I got a question my CX500 swings very slow but momment I connect my car battery aswell then swings fast but my bikes battery is brand new what could be the problem?
 

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It's new, but is it the correct size, and have you fully charged it before using it?

FWIW, a friend of mine recently bought a new battery for his VFR750 - it would start the bike OK, but switch off after a bit and try again and it seemed like the battery was almost completely flat. A short while on charge and it showed fully charged, and would start the bike again...once. Cutting a long story short, the new battery was faulty...
 

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1981 CX500C
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Another thought.....

Is the starter gummed up with ancient debris? You know the basic gunk consisting of dirt, grease, brush dust, metal particles........ the mechanical equivalent of Fomunda Cheese. A car battery is capable of delivering much more current to overcome starter drag than a motorcycle battery.

The battery in my truck is capable of 800 CCA
 

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Fomunda Cheese is related to Toe Jam, but with more solids.

Button Lint is the lightest item in the category. Caution, Button Lint is flammable.
 
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