Idle Mixture Screw

bigfour · 12-20-2006, 06:43 PM

So, I've turned my carb so I can see underneath it and I'm looking for a brass plug but I see two brass things...

The lowermost one looks like a flathead brass screw kind of inset in the carb.

The other one is a slightly larger brass cap with a small circular indent in the middle of the cap.

Which one is the idle mixture screw/cap? I'm thinking the second one is the cap I need to remove but I just want to be sure so I don't drill through something that's actually important. Thanks.

Dupo · 12-20-2006, 11:33 PM

The mixture screw is behind the brass plug that is smooth. Its not the one that would have a flathead inset. They plugged it so you dont F with it, so that would be the harder one to get out

I dremeled mine off ... didnt want to drill into the screw.

bigfour · 12-21-2006, 08:40 AM

Thanks, I think the previous owner may have already removed the cap and the brass flathead screw was the actual idle mixture screw. Now onto the needle shim mod...

Badbob · 12-22-2006, 03:07 PM

There are instructions in the service manual about how to remove plug. Just though I'd toss that in for future reference.

trykemike · 12-27-2007, 11:58 AM

Here is a link to a discussion about carburetor tuning.

http://www.factorypro.com/tech_tuning_p ... gines.html

12-20-2006, 06:43 PM	#1
bigfour Member Join Date: Oct 2006 Location: CT, Norwalk Posts: 51	Idle Mixture Screw So, I've turned my carb so I can see underneath it and I'm looking for a brass plug but I see two brass things... The lowermost one looks like a flathead brass screw kind of inset in the carb. The other one is a slightly larger brass cap with a small circular indent in the middle of the cap. Which one is the idle mixture screw/cap? I'm thinking the second one is the cap I need to remove but I just want to be sure so I don't drill through something that's actually important. Thanks. __________________ Login or Register to Remove Ads
	0

12-20-2006, 11:33 PM	#2
Dupo Senior Member Join Date: Aug 2006 Location: Allentown, Pa Posts: 1,255	The mixture screw is behind the brass plug that is smooth. Its not the one that would have a flathead inset. They plugged it so you dont F with it, so that would be the harder one to get out I dremeled mine off ... didnt want to drill into the screw. __________________ Photography Gallery *updated url - new site! Motorcycle Blog Facebook
	0

12-21-2006, 08:40 AM	#3
bigfour Member Join Date: Oct 2006 Location: CT, Norwalk Posts: 51	Thanks, I think the previous owner may have already removed the cap and the brass flathead screw was the actual idle mixture screw. Now onto the needle shim mod... __________________ Login or Register to Remove Ads
	0

12-22-2006, 03:07 PM	#4
Badbob Senior Member Join Date: Aug 2006 Location: Tallahassee FL Posts: 945	There are instructions in the service manual about how to remove plug. Just though I'd toss that in for future reference. __________________ My GZ250 Blog Facebook Pinterest Google+ Tumblr YouTube Lumber Jocks
	0

12-27-2007, 11:58 AM	#5
trykemike Senior Member Join Date: May 2007 Location: toronto ont canada Posts: 177	Here is a link to a discussion about carburetor tuning. http://www.factorypro.com/tech_tuning_p ... gines.html __________________ sds4 Login or Register to Remove Ads
	0