12-08-2018, 07:27 PM | #89 |
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The stock gap I measured would be just fine for normal applications but if you're tuned I would reduce it to a similar length as discussed here. Worst case it's not a bad idea to simply measure them and ensure they're at least all the same
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12-13-2018, 02:55 PM | #90 |
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I can't believe you guys were buying these for $4 a pop just a few months ago and now they're $20+!!!
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12-13-2018, 02:56 PM | #91 |
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Lol ya got lucky. They'll probably go down.
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'07 Yamaha R1 (sold)
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12-15-2018, 08:12 AM | #93 |
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12-15-2018, 09:13 AM | #94 |
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Modbarg is $100 shipped but rmeuropean is $71.20 so I can work with that.
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12-15-2018, 12:13 PM | #95 |
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03-06-2019, 05:00 PM | #96 |
Mmmmm…
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Finally got home to my car late last night. I ordered the NGK spark plugs from Amazon arrived yesterday. I gapped the plus to 0.23", but since it was -10°C this morning with wind, I decided to have my fave indy do the deed. Took about an hour to get completed.
Results are excellent. No more stutter at WOT in high gears. I can feel better response immediately. As for the factory maintenance plan plugs? Despite only 5k miles or so on them half of them were black and caked with carbon deposits. They looked like plugs had 50k on them not 5k... The gap on them were horrendous. One of them had a crooked ceramic insulator on electrodes. No wonder I was having problems.
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03-06-2019, 05:09 PM | #97 | |
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Quote:
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03-07-2019, 08:28 AM | #98 | ||
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Quote:
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'07 Yamaha R1 (sold)
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03-07-2019, 09:42 AM | #99 | |
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Quote:
These are the factory ones that were pulled out. My paperwork actually says they were changed around 6500 miles ago, but again these don't look that great. I kind of suspect that only the left bank was changed because plugs were very loose in the cylinder head and there is a lot less carbon build up on them. Left bank Right bank
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03-07-2019, 03:14 PM | #100 |
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Yeah going to go with the Ngk’s and those right bank definitely look worse then your right!
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09-08-2019, 08:18 PM | #101 |
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Thank you all
Many thanks for the great info and general moral support on this forum and particularly this thread. I just did a complete plug change on my n63tu yesterday. I used the X5M plugs, gapped to 0.60mm. No problems at all. I used anti-sieze on the threads and a dab of dielectric grease up the snout of all the coils. I swapped in the X5M air filters too, as the old (original equipment) were pretty dirty. Car runs great at sustained WOT and idles perfectly smooth.
I hadn't experienced any issues so I probably could have gotten another 10-20K miles out of the plugs. They looked uniformly great, just like the one in the image. I think I needed to "bond" with the car by doing some wrenching; it feels good to be able to do something besides write checks. Not to cast aspersions on folks who turn all the wrenching over to qualified techs - there's plenty of things I handle that way too. I'm contemplating a BM3 tune, so the plugs were also a preparatory step for that. I'll keep you posted; I think everything is in place to make that go smoothly. Thanks again, everyone. Cheers!
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Last edited by pennsiveguy; 03-11-2020 at 05:12 PM.. Reason: Incorrect gap dimension |
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12-06-2019, 05:48 PM | #102 |
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12-06-2019, 05:50 PM | #103 |
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12-06-2019, 07:04 PM | #105 |
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I paid $13 Aud each at an auto part store. Thanks for write up!
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12-06-2019, 07:41 PM | #106 |
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Just got them from RM European for $8.40 each!
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01-02-2020, 12:17 AM | #107 |
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Just ordered OEM for 215.00!
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06-27-2020, 01:53 AM | #108 |
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07-21-2020, 09:14 AM | #109 | |
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07-21-2020, 03:11 PM | #110 | |
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When you finally decide to change the plugs (normal maintenance schedule or if a problem arises) that's when I'd move to a colder plug.
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