The YS637S is the M38 specific approved carb. It is very different from the YS950S which is the M38A1/M170 specific approved carb. The YS950S has a larger main venturi and a mount flange oriented 90 degrees different and bolt spacing wider then the YS637S.
Are there other carbs that fit the M38's L134 engine. Yes there are. The earlier WWII and CJ2A WO series carb can be adapted as can the YF series carbs. Other's have adapted Webber, Solex & Ford Motorcraft carbs. _________________ Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100
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