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Makotosun

CT3 carb issue

  • Dave G
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CT3 carb issue was created by Dave G

Hi not sure if anyone can help.
I've got a 73 CT3 175 and seem to have a continuing problem with the throttle sticking. Although it isn't the throttle cable because I have been through this numerous times and have put new cables on and the slide shuts down perfectly.
It now won't rev of the bottom and the throttle is sticking intermittently.
I've had the carb apart numerous times too but all looks ok.
Any thoughts please - it's doing my head in!
Thanks guys.
13 Jun 2020 10:00 #1

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Replied by MarkT on topic CT3 carb issue

Wrong (too thick) of a mounting o-ring or an overtightened or warped flange causes slide to stick.
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
The following user(s) Liked this Post: 2fishkev, Swoop56, Pete-RT1
13 Jun 2020 10:40 #2

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Replied by Pete-RT1 on topic CT3 carb issue

The carb on my RT1 1 was sticking when I put it back on the bike, but off the bike it was fine.
It turned out to be the slide sticking when I tightened the nuts holding it to the cylinder.
I didn't think they were that tight but it was enough to flex the carb and cause the slide to stick.
I backed them off and tightened them to the minimum I was happy it would seal and it's been fine since.
Yamaha CT1 007
Yamaha CT1-B The Greenie
Yamaha CT1-B The Doppelgänger
Yamaha CT1-C
Yamaha AT1-C
2020 Honda CB500X
13 Jun 2020 10:42 #3

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