Re-tapping a spark plug hole
 

welp, po never screwed any sparkeys down with a wrench and never told me, just said its ready to go. w/e anyways saved one of the sparkys but number 3 decided t o blow out the head. the threads are still there so im going to try to retap it, but does anyone know the thread pitch of the tap i need? my buddy has a 3/4 or 5/8 tap he uses on cars and is bringin it over but i haz no clue if itll work. i got a spare head to try all sorts of things so im dong that first. also do i need to drop the motor? i currently have the gas tank air filter and radiator off so i can reach i just dun feel like dropping everything out again

Nothing? welp to the shop

update. found the right size tap after driving around for hours and after retapping the threads the spark plug still just spins at the bottom. looks like i need a heli coil

Yep, you're going to need a heli coil.

The only problem with this is finding the right heli coil set considering are spark plugs are m10 x 1.0 impossible to find in a store, might be online only

Check these out too.. I prefer them to helicoils..
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^^^ya unfortunately im not trying to spend 300 bucks to repair something when i can buy a new head for cheaper

Heli-coils are not always the best with sportbikes with the pressure they make around the spark plugs. Sometimes it causes oil leaks, for I have seen this only twice.

Yeh they are spendy.. nice though! The spark ones are more than the one i got, I got my M8 for $60 something off Ebay.

The spark ones are twice that... then you gotta buy the inserts..

TIME-SERT Metric Spark Plug Kit M10x1.0 Part # 4010 - Mechanics Tools and Bits

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I ended up calling my uncle who works at my grandfathers tool and dye company (I now know what that means and what a coincidence haha) anyways, he put me in contact with this place that sells the entire set i need for 55 bucks so im heading that way after work and i'll let you know whats up