M20 ended up as part M30

Information relating to the Matchless G9 or AJS Model 20 500cc twin
Member
Posts: 4
Joined: Thu Dec 10, 2015 10:34 am
Location: KARNATAKA INDIA

M20 ended up as part M30

Postby rajeshnair » Thu May 17, 2018 3:22 am

Hi all from india ,What started as a 1952 M20 with a 59 cases and modified 52 barrels I have managed to finish up as a M30 as I bought G11 barrels and heads from the USA.I live in india and as AMC twins are so rare in india.I was wondering if somebody could help me with a picture of the 59 crankcase filter with the dimension of the filter .Thanks in advance

Member
User avatar
Posts: 1721
Joined: Mon Jan 01, 1990 12:00 am
Location: LANCASHIRE UK

Re: M20 ended up as part M30

Postby dave16mct » Thu May 17, 2018 9:01 am

Page 18 in the '59 manual:

http://archives.jampot.dk/book/Owners_m ... Models.pdf

Cheers Dave.

Member
Posts: 4
Joined: Thu Dec 10, 2015 10:34 am
Location: KARNATAKA INDIA

Re: M20 ended up as part M30

Postby rajeshnair » Fri May 18, 2018 3:30 am

Thank you Dave,my crank case has a release valve on the opposite side of the filter chamber opening into the timing chest,am I correct in guessing my cases are 1959 ? cheers Rajesh

Member
User avatar
Posts: 1721
Joined: Mon Jan 01, 1990 12:00 am
Location: LANCASHIRE UK

Re: M20 ended up as part M30

Postby dave16mct » Fri May 18, 2018 9:02 am

No, the 56-59 twins didn't have any pressure relief valve. If it's a plunger with a loose spring, it will be pre 56. If it's retained by a circlip it will be after 59.
Cheers Dave.

Member
User avatar
Posts: 1721
Joined: Mon Jan 01, 1990 12:00 am
Location: LANCASHIRE UK

Re: M20 ended up as part M30

Postby dave16mct » Fri May 18, 2018 9:05 am

The year should be on the front of the drive side crankcases.

Member
Posts: 4
Joined: Thu Dec 10, 2015 10:34 am
Location: KARNATAKA INDIA

Re: M20 ended up as part M30

Postby rajeshnair » Sat May 19, 2018 1:36 pm

its retained by a circlip. it says 49 s 59 in the timing chest

Member
User avatar
Posts: 1721
Joined: Mon Jan 01, 1990 12:00 am
Location: LANCASHIRE UK

Re: M20 ended up as part M30

Postby dave16mct » Sat May 19, 2018 6:57 pm

If it's retained by a circlip you need the one piece filter assembly. Page 18 in the 1960 manual:

http://archives.jampot.dk/book/Owners_m ... models.pdf

Cheers Dave.

Member
Posts: 4
Joined: Thu Dec 10, 2015 10:34 am
Location: KARNATAKA INDIA

Re: M20 ended up as part M30

Postby rajeshnair » Sun May 20, 2018 3:04 am

Thanks a ton Dave,that really helps.cheers,Rajesh Nair

Return to G9 / AJS Model 20

Who is online

Users browsing this forum: No registered users and 1 guest