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Correct spark plug...?


Guest rwalker

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Guest rwalker

I have a '92 VR. I removed a plug just to check wear and condition and discovered the plug does not match the number listed in the shop manual for the bike: The spark plug was an NGK DPR7EA-9. According to the manual, it should be an NGK DPR8EA-9. I'm assuming this means the plugs in the bike are a lower heat range...? Would this make a difference in performance, especially start/cold performance. The bike runs like it is firing on two cylinders until it gets warm, sometimes. Should I change to the DPR8EA-9 part number plugs?

 

Thanks,

 

Randy

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Just changed mine with stock NGK's today. It's been at least 4 years & 40,000 miles; don't know when the PO changed them last. They looked ready to run another 4 years; gap was correct, light tan color. Only issue I spotted was one of the boots looked funky; wires & boots next?

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