Head Bolt help

Jug now has 4 new 20mm long inserts.
I have 2 new head bolts for 1 side (chain side)
The other side needs slightly longer bolts. I tried awhile ago to track them down but couldn't find. The bolt is no longer stocked.
I ordered 2 from I think a raptor but they're slightly wider and need to be sent back.

Anyone know where I can source them?
If I run the new bolts down on the other side (not chain side) bolts look to be too short.

Any help would be great.
Thanks

well, the x2 helicoil will not help at all if you dont put in there a longer bolt that uses it's complete double length.... no wonder it stripped again



not sure at this point if you can reinstall a x2 heli.... if yes, measure what bolt length you need and search from a good hardware store the highest grade bolt they have.



if you cant, then consider this complete kit by airsal, much better than an unkown used cyl/pis from ebay imho


https://www.motoscoot.net/en/cilindr...00-airsal.html

I need head bolts

Even if i was to get a cylinder plus piston I still need head bolts

I don't know if putting longer inserts will solve problem with blowing head gasket as I've not put bike back together at this point and tested.

I previously had gasket blow from a combination of bad inserts and or stretched head bolts.