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I think I've found the aswer. We know the AJS models 33 and 33 CSR were badge engineered versions of the corresonding Matchless G15P and G15CSR models.

For 1964-65, the G15P was sold in different markets. The UK version had the 3.25x18" tire and the narrow mudguard (030101). The export version (for USA presumably) received fatter 3.50x18 tires and the wider mudguard (030060). It seems this was a design exercise only to meet the american taste for fat tyres inspired by HD.

In the 1965-67 brochures for the AJS model 33 and the Matchless G15, standard fitment for the UK version still was a 3.25x18in front tyre. Likely the same WM3x18 rim was specified as on the export only G15 - NM23319 (**), and the narrow and chrome plated mudguard was fitted. For the export (US) version of the G15, a 3.50x18 front wheel and corresponding wide mudguard was specified as before. At this time the G15P was renamed G15.

For 1966-68, after the N-V take-over, the UK and US export versions continued much like before, except for a new paint scheme, Concentric carbs and points ignition. In the parts book (clearly destined for the US - there are no prices), only the US-spec'ed G15 Mk2 is listed. The absence of the UK specific version is clearly an omission. The G15 was dubbed G15Mk2 to set it apart the G15 Mk1, a bike sold in the US only and which was terminated in 1963.

As a result of changing policies, the AJS brand was deleted from the 1967-68 N-V line-up of heavy models. The M33 isn't represented in any of the the spare part books, but going by the sales leaflets it's clear the M33 was specified with a chrome-plated standard mudguard, p/n 030101 (the actual part number for the chrome-plated version, if there ever was one, is unknown). The reason for the omission may be that the AJS 33 wasn't exported to the US, and after the AMC collapse in the summer of 1966, it seems the 33CSR wasn't exported either.

** It shall be noted that Matchless 650 roadsters were equipped with WM2x18 rims at the front, NM24872, even though the tyre was 3.25x18.

-Knut

<blockquote data-quote="mdt-son" data-source="post: 441726" data-attributes="member: 3823">I think I&#039;ve found the aswer. We know the AJS models 33 and 33 CSR were badge engineered versions of the corresonding Matchless G15P and G15CSR models.For 1964-65, the G15P was sold in different markets. The UK version had the 3.25x18&quot; tire and the narrow mudguard (030101). The export version (for USA presumably) received fatter 3.50x18 tires and the wider mudguard (030060). It seems this was a design exercise only to meet the american taste for fat tyres inspired by HD.In the 1965-67 brochures for the AJS model 33 and the Matchless G15, standard fitment for the UK version still was a 3.25x18in front tyre. Likely the same&nbsp; WM3x18 rim was specified as on the export only G15 - NM23319 (**), and the narrow and chrome plated mudguard was fitted. For the export (US) version of the G15, a 3.50x18 front wheel and corresponding wide mudguard was specified as before. At this time the G15P was renamed G15.For 1966-68, after the N-V take-over, the UK and US export versions continued much like before, except for a new paint scheme, Concentric carbs and points ignition. In the parts book (clearly destined for the US - there are no prices), only the US-spec&#039;ed G15 Mk2 is listed. The absence of the UK specific version is clearly an omission. The G15 was dubbed G15Mk2 to set it apart the G15 Mk1, a bike sold in the US only and which was terminated in 1963. As a result of changing policies, the AJS brand was deleted from the 1967-68 N-V line-up of heavy models. The M33 isn&#039;t represented in any of the the spare part books, but going by the sales leaflets it&#039;s clear the M33 was specified with a chrome-plated standard mudguard, p/n 030101 (the actual part number for the chrome-plated version, if there ever was one, is unknown). The reason for the omission may be that the AJS 33 wasn&#039;t exported to the US, and after the AMC collapse in the summer of 1966, it seems the 33CSR wasn&#039;t exported either.** It shall be noted that Matchless 650 roadsters were equipped with WM2x18 rims at the front, NM24872, even though the tyre was 3.25x18.-Knut</blockquote>

[QUOTE="mdt-son, post: 441726, member: 3823"] I think I've found the aswer. We know the AJS models 33 and 33 CSR were badge engineered versions of the corresonding Matchless G15P and G15CSR models. For 1964-65, the G15P was sold in different markets. The UK version had the 3.25x18" tire and the narrow mudguard (030101). The export version (for USA presumably) received fatter 3.50x18 tires and the wider mudguard (030060). It seems this was a design exercise only to meet the american taste for fat tyres inspired by HD. In the 1965-67 brochures for the AJS model 33 and the Matchless G15, standard fitment for the UK version still was a 3.25x18in front tyre. Likely the same WM3x18 rim was specified as on the export only G15 - NM23319 (**), and the narrow and chrome plated mudguard was fitted. For the export (US) version of the G15, a 3.50x18 front wheel and corresponding wide mudguard was specified as before. At this time the G15P was renamed G15. For 1966-68, after the N-V take-over, the UK and US export versions continued much like before, except for a new paint scheme, Concentric carbs and points ignition. In the parts book (clearly destined for the US - there are no prices), only the US-spec'ed G15 Mk2 is listed. The absence of the UK specific version is clearly an omission. The G15 was dubbed G15Mk2 to set it apart the G15 Mk1, a bike sold in the US only and which was terminated in 1963. As a result of changing policies, the AJS brand was deleted from the 1967-68 N-V line-up of heavy models. The M33 isn't represented in any of the the spare part books, but going by the sales leaflets it's clear the M33 was specified with a chrome-plated standard mudguard, p/n 030101 (the actual part number for the chrome-plated version, if there ever was one, is unknown). The reason for the omission may be that the AJS 33 wasn't exported to the US, and after the AMC collapse in the summer of 1966, it seems the 33CSR wasn't exported either. ** It shall be noted that Matchless 650 roadsters were equipped with WM2x18 rims at the front, NM24872, even though the tyre was 3.25x18. -Knut [/QUOTE]