Which spark plug? - Kawasaki Ninja H2 Forum
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post #1 of 18 Old 06-29-2019, 02:29 AM Thread Starter
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Which spark plug?

Intend to check the plugs soon. They've done 3k. Assuming oe plugs for a tuned road use engine are plenty good enough?
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post #2 of 18 Old 06-29-2019, 02:31 AM Thread Starter
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I've read a few reports of plugs being toast after similar mileage is the reason checking mine.
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post #3 of 18 Old 06-29-2019, 03:12 AM
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Please post up what you find, I'd be interested to know.

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post #4 of 18 Old 06-29-2019, 06:17 AM
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Plugs are very specific , extra long thread , not a lot of options, and not cheap
If your running rich for cyl temp safety they will last less time, also may need to reduce the gap if your pushing higher psi numbers than stock or using E85
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post #5 of 18 Old 06-29-2019, 07:37 AM Thread Starter
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Great info. Thanks.
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post #6 of 18 Old 06-29-2019, 10:37 AM
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Only valid alternative to OEM spark plug I know. NGK R0452A-10. Pretty expensive though.

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post #7 of 18 Old 06-29-2019, 10:59 AM
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Quote:
Originally Posted by Simon0721 View Post
Only valid alternative to OEM spark plug I know. NGK R0452A-10. Pretty expensive though.

The R0452A-10 racing spark plugs are £80 to £90 each depending where you buy them. That's nuts.

The OE is NGK SILMAR9B-9 advertised at around £40. Still expensive though.

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Last edited by BobC; 06-29-2019 at 11:10 AM.
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post #8 of 18 Old 06-29-2019, 11:12 AM Thread Starter
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I did see the oem for £22 each, free shipping. Ebay I'm fairly sure. Motopartz or something similar. Definitely the right plug.
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post #9 of 18 Old 06-29-2019, 11:16 AM Thread Starter
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Excuse my ignorance, but what does the racing plug do that the oe doesn't?
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post #10 of 18 Old 06-29-2019, 12:07 PM
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Originally Posted by UKH2 View Post
I did see the oem for £22 each, free shipping. Ebay I'm fairly sure. Motopartz or something similar. Definitely the right plug.
Be aware that there's a lot of fake stuff on the Internet. Certain countries don't appear to have any control over this, China and others are you listening? If it's advertised at half the normal price I would be suspicious unless the seller can guarantee it's genuine - and you can trust them.

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Last edited by BobC; 06-29-2019 at 12:09 PM.
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