Spark plugs - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
DL650A - 2012-2016 DL650A 2012-2016 (L2-L6)

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 21 Old 09-16-2013, 10:33 PM Thread Starter
Stromthusiast!
 
Join Date: Nov 2012
Location: Toronto, Ontario, Canada
Posts: 219
Spark plugs

So today I pulled off my tank thanks to the great sticky here - I changed out my air filter and pulled my rear spark plugs to change. Then I got the wires off and pulled the plugs the little cap stayed inside the rubber wire cover. I just took the one off the new plug before seating it and it seems to fire fine.

Is this a problem though?

I was surprised to see the plugs were iridium, so I can't figure out for the life of me why they have a 12000km service interval! They had some corrosion and carbon build up but gapped okay so I'm not too worried about replacing the front plugs which seems more of a hassle.
Ploughjockey is offline  
Sponsored Links
Advertisement
 
post #2 of 21 Old 09-16-2013, 10:53 PM
Super Moderator
 
Big B's Avatar
 
Join Date: May 2005
Location: Central OHIO "Go Buckeyes"
Posts: 16,603
Garage
The interval is a recommendation, does not necessarily mean it needs to be done.

BRIAN "GO Buckeyes, GO Wildcats"!

2015 DL650 XT "Hector"

1997 Honda Valkyrie 1500 custom “Dolores”




Big B is offline  
post #3 of 21 Old 09-16-2013, 11:47 PM
Stromthusiast!
 
Dark Angel's Avatar
 
Join Date: Jun 2013
Location: Central West NSW, Australia
Posts: 1,366
Garage
Unless the engine is REALLY hard on plugs, and I really doubt it, iridium plugs are usually good for seventy five thousand Ks or thereabouts. They might wear out sooner if you flog the engine, use crap fuel and generally abuse the bike ... but I can't see them going south in 12,000KMs.

"I've recently come to the realization that true happiness can often be found at the bottom of an empty gas tank" - Prime
Dark Angel is offline  
 
post #4 of 21 Old 09-17-2013, 10:28 AM
Stromthusiast!
 
Join Date: Sep 2013
Location: Alberta Canada
Posts: 172
I wouldn't think 12000 kms would be enough to affect any plug let alone an Iridium. I still think in miles so that equates to about 7500 miles. I'll have to check my manual to confirm what you said as I find that much too soon.

I think a more realistic time to change them would be when the valve adjust check/adjustment is done around the 24000 Km mark.
cycleman is offline  
post #5 of 21 Old 09-17-2013, 05:46 PM
Stromthusiast!
 
fortp's Avatar
 
Join Date: Apr 2012
Location: Qc, Canada
Posts: 833
I have 42000 km and i consider it half of their life.
fortp is offline  
post #6 of 21 Old 09-18-2013, 12:48 AM
Stromthusiast!
 
Kelly2012's Avatar
 
Join Date: Feb 2013
Location: So Cal.
Posts: 872
Iridium is better than platinum, but a lot less of it is used. The smaller center electrode is less durable than platinum- the sharp edge around the periphery is rounded off faster. It's the sharp edge that is the magic, and you're not likely to notice much of a gap change, depending on the construction of the outer electrode.

The recommended change interval does seem overly conservative for even 0.4mm electrodes, but I don't think expecting 75,000 miles is a reasonable expectation. The recommended interval may have to do with emissions regs requiring optimum lean starts and a lean idle. I'll inspect my plugs at the first valve check and change them at 30,000 regardless of how they look, unless I notice harder starts or missing at high throttle and lower RPMs.


Sent from Motorcycle.com Free App
Kelly2012 is offline  
post #7 of 21 Old 09-18-2013, 04:01 AM
Stromthusiast!
 
Dark Angel's Avatar
 
Join Date: Jun 2013
Location: Central West NSW, Australia
Posts: 1,366
Garage
Quote:
Originally Posted by Kelly2012 View Post
I don't think expecting 75,000 miles is a reasonable expectation. The recommended interval may have to do with emissions regs requiring optimum lean starts and a lean idle. I'll inspect my plugs at the first valve check and change them at 30,000 regardless of how they look, unless I notice harder starts or missing at high throttle and lower RPMs.


Sent from Motorcycle.com Free App
I said 75,000 Kilometres, not miles. That's a bit under 47,000 miles. I also said it would depend on the exact conditions the engine was running under.

"I've recently come to the realization that true happiness can often be found at the bottom of an empty gas tank" - Prime
Dark Angel is offline  
post #8 of 21 Old 09-18-2013, 11:39 AM
Stromthusiast!
 
Kelly2012's Avatar
 
Join Date: Feb 2013
Location: So Cal.
Posts: 872
Sorry Dark Angel, I just picked 75,000 miles at random not referring to your post.


Sent from Motorcycle.com Free App
Kelly2012 is offline  
post #9 of 21 Old 09-18-2013, 07:16 PM
Stromthusiast!
 
Join Date: Sep 2013
Location: Alberta Canada
Posts: 172
I checked the manual and the Suzuki recommended maintenance service sheet and yes they recommend them to be changed at 12000 KM or every 24 months. Seems a little short to me but will watch the performance aspect and see what issues start to develop.

I'll probably just look at this one as a yearly maintenance item, like bleeding brakes, lubing cables etc and do it myself during the winter months.
cycleman is offline  
post #10 of 21 Old 09-18-2013, 07:35 PM
Stromthusiast!
 
Dark Angel's Avatar
 
Join Date: Jun 2013
Location: Central West NSW, Australia
Posts: 1,366
Garage
Quote:
Originally Posted by Kelly2012 View Post
Sorry Dark Angel, I just picked 75,000 miles at random not referring to your post.


Sent from Motorcycle.com Free App
No problem.

12,000KM is a ridiculously short interval for iridium plugs imho. For regular plugs, fine, for iridium, no. My old GT550 used regular plugs and only needed refreshing at about 20,000KM intervals IF I'd been giving it a hard time ... which I usually did but even then it didn't make much difference if any (phantom butt-dyno effect). The plugs always looked fine and the gaps would check just fine as well. The also only cost about $3.50AUD each so it was no big thing.

I wouldn't be surprised if the change interval was set with regular plugs and then iridium was substituted to help pass emissions testing.

"I've recently come to the realization that true happiness can often be found at the bottom of an empty gas tank" - Prime
Dark Angel is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome