Spark plug reading

harleeblue
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19 May 2015 18:54 #672787 by harleeblue

Spark plug reading was created by harleeblue

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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turboguzzi
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28 May 2015 07:28 #674167 by turboguzzi

Replied by turboguzzi on topic Spark plug reading

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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jakedude
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28 May 2015 13:11 #674210 by jakedude

Replied by jakedude on topic Spark plug reading

Looks good to me. Like fresh baked bread.

Nothing lasts, nothing is finished, and nothing is perfect.

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SWest
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10 22 2014

28 May 2015 13:54 #674220 by SWest

Replied by SWest on topic Spark plug reading

Be better off with a HD motor for a tractor.
Steve

Z1b1000 1975 Z1b
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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650ed
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28 May 2015 14:06 #674223 by 650ed

Replied by 650ed on topic Spark plug reading

swest wrote: Be better off with a HD motor for a tractor.
Steve

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

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:laugh: :laugh:

1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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zukdave
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28 May 2015 15:47 #674245 by zukdave

Replied by zukdave on topic Spark plug reading

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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