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Thread: WR, WLD, WL cylinders

  1. #1
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    WR, WLD, WL cylinders

    Just for fun some pics of a WR cylinder next to an NOS WLD cylinder and a STD bore solo WL cylinder.

    Note the intake size, WL smallest, WLD midsize (Same as VL UL and '36-'39EL) and largest WR (Same as OHV '40 up twins). Also note the fin configuration, with WLD actually being the largest. And then the casting number, all WR, WLDR, and WLD are -39, WL is -36. All the large fin cylinders are notched for rod clearance. The WR base flange is the thickest.





    Last edited by Rubone; 01-19-2019 at 04:42 PM.
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  2. #2
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    Re: WR, WLD, WL cylinders

    The WLD and WL are the same valve size, WLDR and WR are larger. Only the WLDR and WR are relieved, WLD and WL are not. The WR has the lowest top deck height, that corresponds to the thick base so the overall height is the same.



    Last edited by Rubone; 01-19-2019 at 04:44 PM.
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  3. #3

    Re: WR, WLD, WL cylinders

    KR/KHK compared to the UL. Seadub

  4. #4

    Re: WR, WLD, WL cylinders

    So with the cylinders on the bike and the heads on, is there any way to tell between WLD and WLDR?
    1938 WLDR
    1940 WL (Race Bike)
    1944 WL
    1948WR
    1993 FLHT

    http://1944WL.webs.com

  5. Re: WR, WLD, WL cylinders

    Thanks for the education
    1946 WL Solo
    1970 FLH
    1991 Sportster XLH
    1997 Wide Glide FXDWG
    2005 Road Glide FLTRI

  6. #6
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    Re: WR, WLD, WL cylinders

    Dave,
    The 1939 WLDR cylinders and late '39-'46 WLD cylinders are identical. But the '41 & '42 WLDR would have a 2 1/8" manifold nut and all WLDs would have a 2" nut.
    Also Robbie, in your photos, it's hard to tell for sure, but it looks like the exhaust valves in the WLD cylinder and the WR have been enlarged.
    The WLD should be a 1 5/8", same as WL, and the WR actually uses a smaller 1 9/16" dia. valve if I'm not mistaken.

  7. #7
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    Re: WR, WLD, WL cylinders

    All '40 and '41 WLDR use 4 bolt carbs, all WLD from '40-'46 (And '39 WLDD) use three bolt carbs. All have the same basic cylinder casting, the 120-39. '40 WLDR "Special" also has angled valves like a WR and used WR valve covers.
    Last edited by Rubone; 01-20-2019 at 09:26 AM.
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  8. #8
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    Re: WR, WLD, WL cylinders

    Glad to see you are enjoying yourself Panic.
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  9. #9
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    Re: WR, WLD, WL cylinders

    Ralph, those WLD cylinders are factory new and have never had guides in them, much less valves. The seats are factory cut. WLD valves are same as stock WL and that is what those are. Here is another WLD cylinder with valves in it.

    Last edited by Rubone; 01-20-2019 at 04:15 PM.
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  10. #10
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    Re: WR, WLD, WL cylinders

    Bushing shaft flat tappet cams as used in the "WR Kit".



    Last edited by Rubone; 01-20-2019 at 04:27 PM.
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