Spark Plugs

Mike Rocket said:

Which spark plugs are now the correct ones to fit? World of Triumph list NGK DPR7EA-9 and the handbook says NGK DPR8EA-9. Does it matter and does anybody know the difference?
Thanks for any opinions and advice.

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Gerald said:

The DPR7EA-9 is one range hotter, have seen listings that spec. both heat ranges.

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Mike Rocket said:

Is the DPR7EA-9 the one they changed to later for some reason, do you know?

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Kevin frazier said:

Or E3 if youre pulling like nhra

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Gerald said:

Looks like the first was irodium, never tried the second type.

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Kevin frazier said:

Platinum out of my ford, 115000 miles, just switched to E3 in it. It likes the E3. theyre going in the lush racing engine also.

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Gerald said:

I believe they started with the 7, and changed later to the 8. Believe if you're regular every day riding normal use, the 7's would be fine. If pushing harder and upper rpm's the 8 would probably be better. Don't believe either range would hurt unless running lean. Run a set of either and pull them out after one or two hundred miles and check them. Usually takes a little while for plugs to color

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