Locked2009 Grizzly 700 spark plug problem?

Mud Bogger
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2010/04/22 00:42:56 (permalink)

2009 Grizzly 700 spark plug problem?

I only have 216 miles on my 09 700 and it would not start the other day. I checked everything and found the plug was not sparking, i swaped plugs and it works fine now. My question is what should I be looking for as far as a reason why i would foul a plug at only 216 miles? Thanks

'09 Yamaha Grizzly eps 700 Special Edition(Red Midnight Armor) with 28" Mudzillas on ITP Black ss212's, 2" HL lift, Warn 2.5 winch, H.I.D. headlights
'07 Yamaha Wolverine 450 Special Edition(Black Metallic) with K&N, Jet Kit, GYTR pipe, H.I.D. headlights
'04 Yamaha Grizzly 660 red with 28 Bugs, lift and flipped hubs, Warn2.5 winch w/amstell rope, HL HMF Hi Performance kit, custom warning plates.
'04 Yamaha Wolverine 350 4x4, K&N Filter, Jet Kit, 25" ITP Mud Lights 
'99 Honda 450ES  SOLD!!  
'86 Honda ATC250ES Big Red- 25" Cheapie's all around, And ELECTRICAL PROBLEM

2 Replies Related Threads

    Trail Rider
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    Re:2009 Grizzly 700 spark plug problem? 2010/04/22 07:27:37 (permalink)
    to the best of my knowledge, you're either getting too much air or too much fuel and it appears  that you don't have any mods done to affect either.  If I were you, I ask one of the factory techs.

    2007 Yamaha Grizzly 700 EPS
    EPI Clutch
    29.5 Outlaws
    Uni Filter
    HMF Optimizer
    HMF Exhaust
    3k Warn
    SonyMarine w/ Bazookas

    Grass Hog
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    Re:2009 Grizzly 700 spark plug problem? 2010/04/22 07:46:17 (permalink)
    Short trips on any EFI will foul the sparkplug.  They really need to be riden for aleast 3 to 5 miles (or 20 to 30 mins).  This will ensure that the motor is up to operating temp and put back a charge in the battery from starting. 
    Also make sure that you get the correct sparkplug, the 07 an 08 have a short plug 09 10 have a long spark plug.
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