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Spark plug reading 19 May 2015 18:54 #672787

  • harleeblue
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Trying to tune top end my kz 1000j in a tractor pull this is a picture of my plug wide open top end.well about 7000 rpm with a small flutter.what do you think. I need some advise if anybody could help me out. Stock motor with open pipe stock main jets, with bigger pilots!!!
bradley frantz
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Spark plug reading 28 May 2015 07:28 #674167

  • turboguzzi
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would say it's fine, even if it's a bit on the edge of lean....

maybe go +2 to +5 on the mains and see if you get more of a grey ring on the bottom of the insulator?

not a tractor pull expert by any means, just a road racer....

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Spark plug reading 28 May 2015 13:11 #674210

  • jakedude
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Looks good to me. Like fresh baked bread.
Nothing lasts, nothing is finished, and nothing is perfect.

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Spark plug reading 28 May 2015 13:54 #674220

  • SWest
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Be better off with a HD motor for a tractor.
Steve
Z1b1000 1975 Z1b
Opinions expressed by me do not reflect those of the the staff or members
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229

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Spark plug reading 28 May 2015 14:06 #674223

  • 650ed
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Be better off with a HD motor for a tractor.
Steve


Or even for a tractor trailer......

Attachment 00003a-41.jpg not found


:laugh: :laugh:
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)
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Spark plug reading 28 May 2015 15:47 #674245

  • zukdave
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To me it's lean go up two size on the main jet's.

Also with this ethanol blended fuel it does not color plugs like gas did back
when these old KZ's were built.
1980 KZ650 F1
ZX750A1 motor.
Wiseco 810cc kit.
Zukiworks racing ported head.
VM 29 smooth bore's.
Dyna 2000 Ign. w/Dyna mini coil's
APE cylinder stud's and nut's.
APE valve spring's.
APE Track King clutch.
V/H KZ1000 sidewinder.
3.5x18 laced to a KZ1000 disk hub.
150/60/18 Shinko 006 Podium.
63" wheel base.

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