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Post by parthz8 on Jun 20, 2023 8:38:43 GMT -7
My MT 10 after few hundred kilometers is due for spark plug replacement. Questions: 1) OEM NGK spark plug LMAR9E-J is available. But what Iridium or Laser Iridium equivalent to LMAR9E-J can be used? Anyone tried? 2) How often (at what mileage) you all change your spark plugs? What type? 3) I found NGK Laser Iridium SILMAR9B9 similar to LMAR9E-J (same heat hez-thread, reach, thread pitch size and same Heat Range). But Gap is different. LMAR9E-J Gap is 0.7mm within motorcycle specs, while SILMAR9B9 is 0.9mm - 0.2mm bigger than specified range. Does this make any difference or damage? 4) Overall Iridium over OEM what are benefits other than longer longevity?  |
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Post by mt10orc on Jun 21, 2023 14:15:53 GMT -7
I’d like to know as well as my change is coming up soon. Being a cheapskate I’ll really need to be convinced about the iridium plugs.
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Post by RedAndBlack on Jun 22, 2023 11:43:51 GMT -7
I don't know if Yamaha has changed the intervals but for the 2017, it's 8000 miles. I changed the stock plugs and they looked fine. I felt another 2000-4000 miles would've been fine and more consistent with the change intervals on some other bikes.
I also ride the bike aggressively, I don't use the bike to commute. So seeing such fresh plugs at the recommended mileage to change was very surprising.
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Post by parthz8 on Jun 24, 2023 12:57:44 GMT -7
So after doing some research, sleepless nights thinking about iridium, platinum, diamond and what not.... decided to go with OEM normal NGK LMAR9E-J.
Two reasons:
1) Its difficult to find exact replacement of LMAR9E-j in Iridium for Yamaha CP4s. All it trial and error
2) From R1 Forum someone said: "Iridium is waste, platinum is a waste. Just get standard copper plugs in your favorite brand. any car forum always talks about plugs and what not.... i've tried both, as many many have, you'll never notice a difference. just make sure they're gapped right."
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Post by willl84 on Jun 24, 2023 16:35:12 GMT -7
So after doing some research, sleepless nights thinking about iridium, platinum, diamond and what not.... decided to go with OEM normal NGK LMAR9E-J. Two reasons: 1) Its difficult to find exact replacement of LMAR9E-j in Iridium for Yamaha CP4s. All it trial and error 2) From R1 Forum someone said: "Iridium is waste, platinum is a waste. Just get standard copper plugs in your favorite brand. any car forum always talks about plugs and what not.... i've tried both, as many many have, you'll never notice a difference. just make sure they're gapped right." I ran a dyno at a Ducati shop back in like 2007. Had some company with some special plug guaranteeing more HP. I ran them back to back on my TLR. I also ran like 5 different sets of plugs back to back - standard, iridium, etc. Every single run was within ~2 HP. That's within the margin of error. The iridium benefit is longevity. They tend to last longer and have a powerful spark longer into their lifetime than copper plugs. If you're changing them often anyways just get the regular ones. |
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Post by mt10orc on Jun 24, 2023 21:45:36 GMT -7
So after doing some research, sleepless nights thinking about iridium, platinum, diamond and what not.... decided to go with OEM normal NGK LMAR9E-J. Two reasons: 1) Its difficult to find exact replacement of LMAR9E-j in Iridium for Yamaha CP4s. All it trial and error 2) From R1 Forum someone said: "Iridium is waste, platinum is a waste. Just get standard copper plugs in your favorite brand. any car forum always talks about plugs and what not.... i've tried both, as many many have, you'll never notice a difference. just make sure they're gapped right." I ran a dyno at a Ducati shop back in like 2007. Had some company with some special plug guaranteeing more HP. I ran them back to back on my TLR. I also ran like 5 different sets of plugs back to back - standard, iridium, etc. Every single run was within ~2 HP. That's within the margin of error. The iridium benefit is longevity. They tend to last longer and have a powerful spark longer into their lifetime than copper plugs. If you're changing them often anyways just get the regular ones. Thanks for that bro. |
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Post by mt10orc on Jun 24, 2023 21:46:05 GMT -7
So after doing some research, sleepless nights thinking about iridium, platinum, diamond and what not.... decided to go with OEM normal NGK LMAR9E-J. Two reasons: 1) Its difficult to find exact replacement of LMAR9E-j in Iridium for Yamaha CP4s. All it trial and error 2) From R1 Forum someone said: "Iridium is waste, platinum is a waste. Just get standard copper plugs in your favorite brand. any car forum always talks about plugs and what not.... i've tried both, as many many have, you'll never notice a difference. just make sure they're gapped right." Will follow suit. |
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