Spark plug adapters

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29 Jun 2011 14:08 #460144 by Archiddeon
Spark plug adapters was created by Archiddeon
I'm trying to connect my compression gauge to the engine of my 1983 GPz 550, the problem is that the smallest connector for the gauge is for 14mm spark plugs and the GPz 550 seems to take 12mm ones.

Soooo ... does anyone know a good place to buy a simple 14mm - 12mm spark plug adapter?

I've seen a few websites which cover making one out of an old spark plug, but they shouldn't be too pricey to simply buy, right? I mean a Snap-On one only runs ~$18 ( buy1.snapon.com/catalog/item.asp?item_ID=75283&group_ID=19865 ).

Thanks :)

1983 GPz 550
1985 Honda CH150 Scooter
1995 Suzuki GS500E

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  • Motor Head
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  • FIX UP YOUR BIKE RIGHT AND CHEAP
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29 Jun 2011 14:12 #460145 by Motor Head
Replied by Motor Head on topic Spark plug adapters
try your local NAPA store. They have a lot of tools still. Or maybe another larger Parts store such as PepBoys. Should be 12x1.25mm, for the head.

1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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  • Paroxyst
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  • KZ550 -82 B3. KZ550 A1. ZX550A1. CBR600F2
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24 Jul 2012 18:02 #538309 by Paroxyst
Replied by Paroxyst on topic Spark plug adapters
I found out the hard way about that too but I used a tire vavle from a car and removed the inner valve and just press down the sparkplug hole and press the compression tester against the hole.
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30 Jul 2012 01:06 #539503 by floivanus
Replied by floivanus on topic Spark plug adapters
old thread but I can bite, being poor I made my own, took a 14x 1.25 nut, welded it to a short piece of pipe, then welded that to the end of an old 12mm spart plug. vacuum tested for leaks, added a few o-rings and done, total cost. just wire and gas.

my bikes; 80kz1000(project), 77 gl1000, 74 h2 (project)
Past; 78 kz1000, 83 kz550
Andrew

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