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Close ratio transmission ct3

08 Apr 2020 01:24
Youngdrakeo
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Close ratio transmission ct3 #1
Hi guys.

I am looking for a ct3 transmission to fit into my AG175.
I read there was a selected few ct3s that came out close ratio.

Can you mix and match from anther bike to make your own? YZ125?

73 CT3 modified, 74 AG175 MX, 79 YB100 x2 , 79 GT 80 ,2015 ducati scrambler ,honda CT70

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08 Apr 2020 04:10
MarkT
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Close ratio transmission ct3 #2
Regarding Enduros, there was only a 1971 close ratio CT1 as far as I know. That trans would fit a CT3 and probably your AG.

There are other options... can be hard to find and a little expensive... popular for road racing as far as I can tell. What kind of racing are you doing? Projected engine mods? A CT trans might be fine. Someplace I have all the ratios for the options. Let me look for them and get back to you.

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

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08 Apr 2020 13:04
Youngdrakeo
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Close ratio transmission ct3 #3

MarkT wrote: Regarding Enduros, there was only a 1971 close ratio CT1 as far as I know. That trans would fit a CT3 and probably your AG.

There are other options... can be hard to find and a little expensive... popular for road racing as far as I can tell. What kind of racing are you doing? Projected engine mods? A CT trans might be fine. Someplace I have all the ratios for the options. Let me look for them and get back to you.


Thanks mart I appreciate it!
Plan to use it for vintage motorcross racing/trail riding from what I can tell the AG shares the same 1~2~3 gears. 4/5 is different and also the AG Clutch basket and crank gear is 77-17 where the ct is 74-19

73 CT3 modified, 74 AG175 MX, 79 YB100 x2 , 79 GT 80 ,2015 ducati scrambler ,honda CT70

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08 Apr 2020 13:12
Youngdrakeo
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Close ratio transmission ct3 #4
As for engine mods.
74 Dt top end. May or May not port this cylinder. Will reduce the squish to about 1mm from 1.5.
28mm carb and will use my sleeper pipe.

73 CT3 modified, 74 AG175 MX, 79 YB100 x2 , 79 GT 80 ,2015 ducati scrambler ,honda CT70

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08 Apr 2020 21:39
DaveR
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Close ratio transmission ct3 #5
I have a complete set I might part with ?

I also attached some information that should help. A few part numbers have been updated from original parts list on the 7/8/1969 Parts News !

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08 Apr 2020 21:54
Youngdrakeo
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Close ratio transmission ct3 #6

DaveR wrote: I have a complete set I might part with ?

I also attached some information that should help. A few part numbers have been updated from original parts list on the 7/8/1969 Parts News !


Hi dave How much are you after? Will private message you.

73 CT3 modified, 74 AG175 MX, 79 YB100 x2 , 79 GT 80 ,2015 ducati scrambler ,honda CT70

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08 Apr 2020 22:33
MarkT
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Close ratio transmission ct3 #7
Youngdrakeo... sent you an email with the comparison spreadsheet on the ratios... I have more details if you need them.

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
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09 Apr 2020 14:09
Mothersbaugh
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Close ratio transmission ct3 #8
Pics sent via PM shortly...

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09 Apr 2020 14:15
Mothersbaugh
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Close ratio transmission ct3 #9
Not sure the PM sent....

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09 Apr 2020 16:22
Youngdrakeo
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Close ratio transmission ct3 #10

Mothersbaugh wrote: Not sure the PM sent....



Following the close ratio bulletin up above from dave.
Couple of the numbers don't match up. Do you think it might be for a different bike?

73 CT3 modified, 74 AG175 MX, 79 YB100 x2 , 79 GT 80 ,2015 ducati scrambler ,honda CT70

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