Author Topic: 650 head (Read 2587 times)

ger · « **on:** October 12, 2007, 09:33:22 AM »

Hi Folks,

Does anyone have a spare 650 head lying aound that they want to sell......

I was removing the exhaust elbows last night and managed to shear off the studs....

Thanks
Gerry

bis13 · « **Reply #1 on:** October 12, 2007, 09:41:06 AM »

oops... i did this and had to drill them out. you can do this if you have the right tools. but do not use a reverse thread stud remover as it will break for sure!! then you must drill that bugger as well!! go slowly and they will come out.

ger · « **Reply #2 on:** October 12, 2007, 10:15:22 AM »

I did drill them out and retapped to M8........But I'd still like to have a spare head ....just in case !

I had bolts in mine, studs would make so much more sense, thats what I'llbe replacing them with....

Cheers
Gerry

bis13 · « **Reply #3 on:** October 12, 2007, 10:19:03 AM »

i had studs and they still shear off when you try them . it must be the originals just get brittle with all the heat and age. so new ones should be fine.

have a look on german ebay "peter auteill" has got new heads normally and he is cheap.

meuton · « **Reply #4 on:** October 12, 2007, 10:25:34 AM »

Hi Gerry

fitting helicoils in the tapped holes is always a good alternative to just retapping the holes to a bigger size as it removes the oxidisation issue due to the threaded coils being usually stainless steel and once located into the alloy a much stronger fixing than the origonal alloy thread, also as i know you will have done a little copper ease on the bolt threads goes a long way to easing ht eproblem of ceased bolts shearing

cheers Doug

ger · « **Reply #5 on:** October 12, 2007, 11:00:42 AM »

Cheers Doug !

I have a big tub of copper ease, comes from a long time of working with old junk !

Cheers
Gerry

Tomasz · « **Reply #6 on:** October 17, 2007, 02:58:22 PM »

i also have a spare head but it has regular holes on one side and large studs on the other from having to retap it twice!

126dave · « **Reply #7 on:** October 17, 2007, 06:28:47 PM »

i have a complete head here,dunno if studs or bolts,but is in good nick,took it off to put panda head on...........pain to pack and send tho,but if you get really stuck give me a shout