1959 650 rebuld help

Information relating to the Matchless G12 or AJS Model 31 650cc twin
TrevorCSR
Member
Posts: 80
Joined: Wed Oct 07, 2015 9:12 pm
Location: HERTFORDSHIRE UK

Re: 1959 650 rebuld help

Post by TrevorCSR »

Exactly. Someone who knows has seen your barrels. We only know what you have described. New ring set and it will probably last as long as you will need it to.
Now you have to sort the bottom end. Have you the opportunity of letting your new found mate cast his eyes over that?
SOHC
Posts: 36
Joined: Tue Mar 07, 2017 11:04 pm
Location: Newzealand

Re: 1959 650 rebuld help

Post by SOHC »

TrevorCSR wrote:Exactly. Someone who knows has seen your barrels. We only know what you have described. New ring set and it will probably last as long as you will need it to.
Now you have to sort the bottom end. Have you the opportunity of letting your new found mate cast his eyes over that?
He sed for whats worth see if they can regrind the crank and don't fuss about fancy billet cranks, just put ti together right and it will be fine
SOHC
Posts: 36
Joined: Tue Mar 07, 2017 11:04 pm
Location: Newzealand

Re: 1959 650 rebuld help

Post by SOHC »

Crank guy sed crank is at -40 but sed it would clean up at -50, he crack tested it and it passed, the rods were crack tested and passed,


Is it possible to get -50 ot 60 big end bearings?
User avatar
Stuoyb
Posts: 1229
Joined: Tue Jul 27, 2004 1:00 am
Location: BEDFORDSHIRE UK

Re: 1959 650 rebuld help

Post by Stuoyb »

SOHC
Posts: 36
Joined: Tue Mar 07, 2017 11:04 pm
Location: Newzealand

Re: 1959 650 rebuld help

Post by SOHC »


Cool thank you, I will get some of them
SOHC
Posts: 36
Joined: Tue Mar 07, 2017 11:04 pm
Location: Newzealand

Re: 1959 650 rebuld help

Post by SOHC »

Its nearly time to put the crank halves together, I was going to use that Yamabond three bond 1215 sealer,

should I still put a paper gasket round the oil filter hole between the case halves?
User avatar
dave16mct
Member
Posts: 3234
Joined: Mon Jan 01, 1990 12:00 am
Location: LANCASHIRE UK

Re: 1959 650 rebuld help

Post by dave16mct »

Yes, unless you're making a full gasket between the halves.
SOHC
Posts: 36
Joined: Tue Mar 07, 2017 11:04 pm
Location: Newzealand

Re: 1959 650 rebuld help

Post by SOHC »

Should I use very thin gasket paper?
User avatar
dave16mct
Member
Posts: 3234
Joined: Mon Jan 01, 1990 12:00 am
Location: LANCASHIRE UK

Re: 1959 650 rebuld help

Post by dave16mct »

Yes it's very thin. I think if you're using Yamabond, which I'm told is extremely good, I'd just use the little gasket around the oil filter gallery.
Dave.
SOHC
Posts: 36
Joined: Tue Mar 07, 2017 11:04 pm
Location: Newzealand

Re: 1959 650 rebuld help

Post by SOHC »

Cool thank you.

I don't think I have come across a bike with pressure oil ways between the cases like this
Locked