Switching Head Nuts

[Truder78]

Has anyone ever used regular nuts on the invader heads to rule out the bottom out problem? I know you can add a washer to the acorn nut but what thread size and grade nut would you recommend if you wanted to switch them.
Thx

[rminier]

 It looks like the studs and nuts are metric 8 mm.
 I have never personally tried it, but I would think it would work fine.
 Use a flat, and a lock washer....or possibly you could also use a nylon insert nut, instead of a regular nut.
 With these nuts torqued to only 16 foot pounds, I wouldn't think you need to go to a grade 8 fastener.
 Perhaps someone on here can add more info.

[gixxer6]

I have added a flat under the stock washers.  In one instance I've needed to use 2 extra flats.  I like the look of the stock acorns, so I haven't swapped them out. 

FYI the added washers didn't solve my leaky head gasket issues... 

[Truder78]

Leaks seem to be hit or miss for me I will do the wd40 wet sand as listed here on the site is that for the cylinder tops also? or just the heads

[gixxer6]

The only thing that I could get to permanently seal the heads was NOS 4/6 gaskets.  I tried NOS Kawi gaskets, NOS Deere gaskets, Cometic, Winderosa, Kimpex, and Marshall.  I tried with sealant (several types), without sealant and different combinations of sealant and gasket brand.  I tried sanding the head and cylinder per the manual.  I finally found the NOS 4/6 gaskets and never looked back.  BONUS they are re-usable! 

[Lloyd (ljm)]

 I have used standard 8mm nuts. No problems