Spark Plug Change at 7500 miles - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 25 Old 05-07-2014, 09:50 PM Thread Starter
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Spark Plug Change at 7500 miles

Seems like 7500 miles is not very many miles on a set of plugs. My Ford F-150 sez inspect at 100000 miles. Think I'm going to ignore that service interval. Also it looks like the antifreeze is blue which means suzuki is using it's "super long life antifreeze" so won't have to worry about changing that for 4 yrs....
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post #2 of 25 Old 05-07-2014, 09:59 PM
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Hell no the plugs do not need changed.

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post #3 of 25 Old 05-07-2014, 10:36 PM
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It's nuts. Regular plugs are good for at least 20,000 miles and Iridium plugs are good for 50,000-100,000 miles

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
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post #4 of 25 Old 05-07-2014, 10:54 PM
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They recommend changing the oil every 7500 and plugs to?
Imagine that

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post #5 of 25 Old 05-08-2014, 04:13 AM
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Quote:
Originally Posted by Jake Mountain View Post
They recommend changing the oil every 7500 and plugs to?
Imagine that
They need to give the dealers something back for the 7500 miles service intervals.
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post #6 of 25 Old 05-08-2014, 10:46 AM
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Originally Posted by Oop North John View Post
They need to give the dealers something back for the 7500 miles service intervals.
That's about it! The improvements in oil and metals in the past thirty or so years more than compensates for the increased power outputs. To suggest that synthetic or blended oil need changing that often is nought more than marketing blurb.

Saying that, I'd probably change it around then for the minimal cost it is, but NFW I'd be changing iridium plugs that often - especially if I was stupid enough to pay dealer prices for them.
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post #7 of 25 Old 09-05-2014, 08:32 AM
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Originally Posted by greywolf View Post
It's nuts. Regular plugs are good for at least 20,000 miles and Iridium plugs are good for 50,000-100,000 miles
Before reading that thread I was looking of the internet site of NGK to find the replacement spark plugs (LMAR8BI-9) for my new V-Strom...Have been surprise that we can not find those yet on the NGK internet site : NGK Spark Plugs USA

After reading the quote thread and others, I change my mind and I will not change my spark plugs at 24000 KM. I will probably wait at least at 48 000K before thinking replacing them... by that time the replacement spark plugs would probably be updated on the NGK internet site.
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post #8 of 25 Old 09-05-2014, 02:11 PM
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The construction of the LMAR8BI-9 looks very similar to the IX series; looks like the LMAR8BI-9 has a 0.6 mm center electrode. NGK states the expected life of the IX plug to be the same as standard nickel-plated, copper core plugs. I suspect the reduced change interval came from California. Plus, if you figure a motorcycle plug fires four times as much as a auto engine, you arrive at 7,500 miles. The point is that after 7,500 miles, the performance benefit of the smaller electrode is gone because the sharp edge is ablated. You are left with the equivalent of a standard electrode configuration for the balance of time that you use it, and are more likely to misfire especially at a lean idle or high BMEPs. In any event, it appears that the DL's ignition system is robust and can tolerate extended plug change intervals. I will probably use an IX plug instead of the factory spec'd one when it's time to change- they are a bit cheaper.



From NGK:


"Iridium IX


Since IX plugs are designed to improve ignition performance and fuel economy they use ultra-fine electrodes, but you can drive the same distance using them as you can with Nickel type plugs.
Note: These distance between changes figures are a rough guide and the actual distance may be shorter depending on how your vehicle is used, and the ignition system."

PLUG STUDIO / NGK

Last edited by Kelly2012; 09-05-2014 at 02:24 PM.
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post #9 of 25 Old 09-06-2014, 07:42 AM
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I did ride my Yamaha R1 12 years without to change any sparkplug (the old fashion one) and everything was find..

So i am nor worry about that issue.
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post #10 of 25 Old 09-06-2014, 07:57 AM
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I have stated I change plugs at extended intervals in other threads, 20,000 for standard variety and 50,000 miles or more for iridiums.

However, I failed to add, I typically pull the first set from a new bike on time. I do this to gauge the fueling efficiency of the bike by inspecting the plug insulator color. Once I am confident they look like they are burning well, I either put the original plugs back in if they are easy to change or the bike comes from the factory with iridium to begin with. If the plugs are hard to replace, I swap to iridiums at the first check and go to longer intervals.

Modern efi will fire anything these days. Iridium just lasts longer. However, I have pulled plugs from very lean running machines to find small pieces of insulator missing. This can happen with an engine that is getting coolant in the cylinder also.

So, be certain your bike is healthy before running such long intervals.

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