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TOPIC: 1971 AT1 Air Filter

1971 AT1 Air Filter 09 Jan 2019 10:01 #1

  • sleezer
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Good afternoon fellow badge bros. I'm working on a 1971 AT1-C rebuild and had a question regarding air filtration.... Do you go with an aftermarket pod directly connected to the carb OR stick with the original OEM set up (boot to box)? I know there's the argument about keeping the bike OEM vs. aftermarket and personal preference there. We can stay away from that for the purpose of this conversation. I'm looking for the most cost effective solution for optimized performance. I appreciate the input!

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1971 AT1 Air Filter 09 Jan 2019 10:39 #2

  • MarkT
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If you're riding in wet/muddy conditions I'd stick with stock air box of some type.

Otherwise, Meis has found a KTM 50 Uni Filter that fits really well on the early CT/AT... oval shaped and clears the frame nicely vs. the common pod filters.
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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

1971 AT1 Air Filter 09 Jan 2019 13:39 #3

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KDI makes a paper replacement

Capt. Dave makes his own out of green foam and they are really the best I have seen.

a

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YAMA-LAND
818-521-2109
MINIBIKESERVICE@AOL.COM 1971 125cc AT1-C (DOROTHEA) 1971 175cc CT1-C (BRANDY) 1970 250cc DT1-C (MONICA) 1973 100cc Hodaka Combat Rat (ABBY NORMAL) 1975 DT400 (BONNIE BELL)

1971 AT1 Air Filter 09 Jan 2019 20:39 #4

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Here's one of the posts about the great fitting filter Meis found.

yamaha-enduros.com/index.php/forums/perf...stion?start=10#55892

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1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250

1971 AT1 Air Filter 10 Jan 2019 05:55 #5

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This is very helpful guys. I appreciate it. Question: do you need to remove the existing airbox in order for the Uni filter to fit to the carb? Thanks!

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1971 AT1 Air Filter 10 Jan 2019 09:13 #6

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Yes.

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