Spark plug change. How often? - Yamaha Grizzly ATV Forum
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post #1 of 18 Old 01-11-2011, 02:12 PM Thread Starter
 
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Spark plug change. How often?

For the 700 guys. How often are you needing to change spark plugs?

For me it seems to be every 400 miles or so. I know to change it when idle isn't as smooth or doesn't start up right away or will do the stall thing more often than usual.
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post #2 of 18 Old 01-11-2011, 02:28 PM
 
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Change spark-plug every year or about 800 miles with OEM plug. Works just fine for me and have about 1600 miles and have an 08 Grizzly 700.
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post #3 of 18 Old 01-11-2011, 02:38 PM
 
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These 09s and up have different plugs than the earlier models and they EAT them fast. I'm not the kind of guy who waits around for poor performance to happen. 250 miles and the plug gets thrown away and a new one put in. I change the oil-oil filter-plug and clean the airfilter OFTEN- that's the way I like to roll. If I wanted to putt putt around not changing anything I would own a honda.

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post #4 of 18 Old 01-11-2011, 02:55 PM
 
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WUN why couldn't you just run a hotter plug

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post #5 of 18 Old 01-11-2011, 03:01 PM
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08 700 3300 mi. Have changed the plug one time after fouling on a cold start up in 30* temps at about 1500 mi. Other than that one time it has always started and run great.

09 550 2400 mi. Have never changed the plug. Starts and runs great.

IMO, the key to long plug life is to warm up the engine before giving any heavy throttle and to make sure and have some run time at high RPMS to keep the plug cleaned off. In other words, don't just "putt" around and then shut the motor off especially on a cold engine!!!

Those that have fuel controllers make sure you don't run too rich!!!!!

I do carry spare plugs on the bikes because you never know!!

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post #6 of 18 Old 01-11-2011, 03:32 PM
 
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Quote:
Originally Posted by Aarons grizznizz View Post
WUN why couldn't you just run a hotter plug
Because people don't post up saying a hotter plug fixes the plug problem on these 09s and up. I always warm my engine up good when I get ready to ride. I never putt around much either, I work that engine alot. Sticking a new plug in there frequently doesn't bother me at all. I could care less. The plug isn't on my list of things to worry about. I know what to do, take them out frequently and throw them away. This isn't what everybody should do, do what ya want with yours

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post #7 of 18 Old 01-11-2011, 03:39 PM
 
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No I'm not saying you I'm just saying in general. I put a hotter plug in mine when I did all my mods and I've never had to change mine and it still looks good. Now,before I was running rich that's why I tried a hotter plug.

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post #8 of 18 Old 01-11-2011, 04:07 PM
 
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I agree with most of whats been said, it all adds up to your riding style, mods, conditions of your quad and the terrain you ride in and what works for you. Like mentioned carry spares because nobody knows when ones gonna go south on you and you know your riding partners most of the time don't have a spare plug!
Hell it aint rocket science it's common sense!

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post #9 of 18 Old 01-13-2011, 03:52 PM
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1500 miles but it still looked nice. Good mocha tan color.

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post #10 of 18 Old 01-13-2011, 06:03 PM
 
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Amen. The 09's Eat them. Every 10 - 20 hours, I'll pull it out and check it. I went through 2 in 09, and just changed mine while doing fluid change last week. Start's like crap, idles like crap, time to change plug. I always keep a spare.

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post #11 of 18 Old 01-13-2011, 07:42 PM
 
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I also change my plug, oil, filter, diffs and clean the air filter alot.

Considering it is so cheap to keep it all fresh, the question is why not do it a few times a year/season. Whats cheaper, a little maintenance here and there or a new engine?

Piece of mind for me and hopefully I can extend the grizz's lifespan due to all the abuse I inflict on it.

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post #12 of 18 Old 01-14-2011, 09:07 AM
 
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I have 8500 miles on my Grizz now and am on the second plug. The first plug was changed at around 3500 miles and looked good and no issues. Runs and idles fine and gets excellent fuel mileage. I will be changing it at the next service, but just for peace of mind, not because it is worn out.

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post #13 of 18 Old 01-14-2011, 10:39 AM
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It seems the more engine mods, the more you monkey with it. Its makes sense, your getting more out of the motor, so maybe it burns plug faster.

I'm at 1000 miles on mine, 70 hours, and always let it warm up while I gear up. Runs like a top. I don't plan on changing it until it runs bad. Even on the trail if it took a crap, I'd hope to be able to clean it enough to get me to my truck. Plugs, in my experience are not on / off, they run like crap and enough to get you home.

I follow my manual for all service. I'm not a mudder, and lucky to get water over the wheels every 100 miles I've gone.

Now if I lived were a real griz could tear me apart while walking back ( i've had to walk back in CO), I'd carry an extra and sidearm.
 
post #14 of 18 Old 01-14-2011, 07:12 PM
 
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Mine usually gets changed ever couple hundred miles but thats cause keep changing stuff and always throw in a new plug.

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post #15 of 18 Old 01-14-2011, 08:33 PM
 
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Quote:
Originally Posted by ColoGrizguy View Post
It seems the more engine mods, the more you monkey with it.
I agree with that, also seems the bikes with the pods jacked up to 40-100 have the most problems.

When I did the exhaust tip (before the two bros) and set my pod to 30 I noticed the plug got really bad.

My understanding is that is why Yamaha removed access to the fuel settings from the later quads cause guys were jacking them up fouling plugs causing poor performance and bringing them back to the dealers for warranty repairs. That's just what I have been told by dealers.

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