facebook1 youtube1 twitter1 instagram google plus linkedin1 pinterest1

logosmallNOTICE:  If you are not a free registered member of the site, you will not see the photos in the forum, and you won't be able to access our premium member content. Please consider joining our community!

Welcome, Guest
Username: Password: Remember me
  • Page:
  • 1

TOPIC: 1968 YG5T stripped air screw

1968 YG5T stripped air screw 12 Jan 2019 09:37 #1

  • yamahahaha
  • yamahahaha's Avatar Topic Author
  • Offline
  • Site Contributor
  • Site Contributor
  • Posts: 521
  • Likes received: 139
Finally got to the carb. Idiot me :EEEK instead of waiting to soak the carb I tried to muscle the air screw out. Air screw WON. What is the best way to remove it ??? Tap/Drill ??? Easy out ????Any recommendations on what size also
Attachments:

Please Log in or Create an account to join the conversation.

Last Edit: by yamahahaha.

1968 YG5T stripped air screw 12 Jan 2019 20:18 #2

  • mdscott
  • mdscott's Avatar
  • Offline
  • Site Contributor
  • Site Contributor
  • Posts: 1801
  • Likes received: 930
Try a propane torch, the slides on my CB500 carbs were completely stuck, heat did the trick.

Please Log in or Create an account to join the conversation.

Thanks Mark
Roseville, Ca.

'76 Bultaco 143 Frontera
'06 GL1800
07 DL650
74 DT360
75 Norton
73 CB500K
63 C200
87 PW50
64 McClane Edger

1968 YG5T stripped air screw 14 Jan 2019 04:49 #3

  • yamahahaha
  • yamahahaha's Avatar Topic Author
  • Offline
  • Site Contributor
  • Site Contributor
  • Posts: 521
  • Likes received: 139
problem is even if I loosen it up there's nothing to grab onto to get it out ?????

Please Log in or Create an account to join the conversation.

1968 YG5T stripped air screw 14 Jan 2019 06:32 #4

  • MarkT
  • MarkT's Avatar
  • Offline
  • Site Contributor
  • Site Contributor
  • Posts: 5519
  • Likes received: 2740
I would try to use a dremel to make enough of a slot to get a little bite... that screw shouldn't be tight.

I'd try to boil the carb in water and see if you can get the screw to turn while it's hot. Maybe penetrating oil. Propane torch if careful... you can melt the carb body.

Last resort would be drilling... and if you do I'd get a new screw first... I think the head is big but the threads are tiny. I'd be afraid of ruining the carb completely.

Please Log in or Create an account to join the conversation.

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

1968 YG5T stripped air screw 15 Jan 2019 04:13 #5

  • RT325
  • RT325's Avatar
  • Offline
  • Collector
  • Collector
  • Posts: 3915
  • Likes received: 1262
Doesn't look like it applies in this case--but--i've seen air screws in carbs from rotary valve motors--can't remember if yamaha but--they had a drilling through the center of the screw to draw air in that way, still adjusted the same way. Have you had your motor running?, if it idles ok it might be best to leave it alone & just clean the jets etc--everything else that will come out.

Please Log in or Create an account to join the conversation.

1968 YG5T stripped air screw 15 Jan 2019 04:40 #6

  • yamahahaha
  • yamahahaha's Avatar Topic Author
  • Offline
  • Site Contributor
  • Site Contributor
  • Posts: 521
  • Likes received: 139
I've only had it running for about 2-3 seconds. I had put some fuel into the cylinder to see if it was going to fire. Like you said, I'm hoping it idles fine and I don't even have to mess with it.

Please Log in or Create an account to join the conversation.

  • Page:
  • 1
Moderators: VinnieDEETyamadminDmanEnduronutMakotosunDevinJames Hart