How often do you change spark plugs - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 15 (permalink) Old 09-21-2014, 08:43 PM Thread Starter
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How often do you change spark plugs

Curious how often most change their spark plugs.

-Robert
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post #2 of 15 (permalink) Old 09-22-2014, 07:05 AM
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If you installed iridiums as suggested here...about every 80,000 miles.

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post #3 of 15 (permalink) Old 09-22-2014, 08:34 AM
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If you installed iridiums as suggested here...about every 80,000 miles.
21,000 miles on my Iridiums and they look and fire great.

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2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
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post #4 of 15 (permalink) Old 09-22-2014, 10:20 AM Thread Starter
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What's the p/n on the iridium plugs?
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post #5 of 15 (permalink) Old 09-22-2014, 10:41 AM
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Quote:
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What's the p/n on the iridium plugs?
NGK DPR7EIX-9

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2007 Vulcan Mean Streak SE

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post #6 of 15 (permalink) Old 09-22-2014, 12:26 PM
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I changed mine every other day it seems like. Eventually I chucked the iridium because they didn't work as well as the plain NGK. The neck on the iridium's on the rear left plug kept breaking for some reason. Maybe I was hitting it with my leg. Very fragile though it that was the case.

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post #7 of 15 (permalink) Old 09-22-2014, 12:35 PM
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Quote:
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I changed mine every other day it seems like. Eventually I chucked the iridium because they didn't work as well as the plain NGK. The neck on the iridium's on the rear left plug kept breaking for some reason. Maybe I was hitting it with my leg. Very fragile though it that was the case.
Have to disagree with everything you said about the Iridiums. Been using NGK plugs for over 20 years in my bikes, boat motors, and lawn equipment with much success. Iridiums are much better than the stock plug. JMO

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2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
All LED lighting
Upgraded Mosfet rectifier
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post #8 of 15 (permalink) Old 09-22-2014, 01:00 PM
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Quote:
Originally Posted by JM2001 View Post
Have to disagree with everything you said about the Iridiums. Been using NGK plugs for over 20 years in my bikes, boat motors, and lawn equipment with much success. Iridiums are much better than the stock plug. JMO
Ditto that. Never had a problem and they did seem to actually work better. Use them in my car also.

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post #9 of 15 (permalink) Old 09-22-2014, 01:11 PM Thread Starter
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I've probably got 1,000 miles or so on my NGK coppers. Yesterday I noticed starting was a bit harder than normal and I got some backfire on starting. I pulled the plugs. Generally they look good (no evidence of incorrect mixture or oil). However, they do look well worn. It seems a bit early to wear so much. I sand basted them and was considering putting them back in.

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post #10 of 15 (permalink) Old 09-22-2014, 02:30 PM
..have a vulcan good day!
 
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Question: While on subject of Spark Plugs.... If spark plugs get gasoline wet/soaked do to a spark malfunction issue.... malfunction resolved, If cleaned, are they still 100% ?

(Iridiums)


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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