Need to fix a spark plug hole thread. Need correct specs

If it's broken or just needs tweaked

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juntjoo
Posts: 299
Joined: Fri Nov 10, 2017 6:19 pm

Need to fix a spark plug hole thread. Need correct specs

Postby juntjoo » Thu Mar 07, 2019 2:28 pm

I don't know if there is a standard for motorcycles or something but I've gathered they're smaller than for car/truck plugs so I'm just trying to find the right general thread repair kit. I'm going for a heli-coil kit cuz their particular tool allows for lateral clearance for deep narrow circumstances where the other brand(s) have these fat handles. And I found a used one on Amazon for a good price but I wanna make sure.

I'm measuring close to m12 but as you can see it's not quite exact at least with this little "pocket caliper"
20190307_133708.jpg
20190307_133708.jpg (2.05 MiB) Viewed 407 times
but it measures perfect for other taps I tested with it. The thread measurement is exact at 1.25 though.

Anyone know the exact measurements? Thanks
82" cb650 Nighthawk

kerryb
Posts: 43
Joined: Fri Oct 19, 2018 3:18 pm
Location: Buffalo, N.Y.

Re: Need to fix a spark plug hole thread. Need correct specs

Postby kerryb » Thu Mar 07, 2019 9:48 pm

Spark plug size for cb650 is 12mm.

juntjoo
Posts: 299
Joined: Fri Nov 10, 2017 6:19 pm

Re: Need to fix a spark plug hole thread. Need correct specs

Postby juntjoo » Thu Mar 07, 2019 9:55 pm

kerryb wrote:Spark plug size for cb650 is 12mm.


Thanks!
82" cb650 Nighthawk


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