The message to which you are about to reply is shown first. GO TO REPLY FORM



 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Cross-Adjusting Carbs? 120-130

Yup, that's the standard way of doing it. You MUST start with both jets in the same basic height setting, you can find that by counting the flats on the jet height adjustment nut. Visually check the height of the jet by looking underneath the piston. Check the two needles are in the piston properly, both the same, shoulder lined up with the bottom of the piston.

Then undo the clamp connecting the linkages on the two carbs, the carbs now operate independently. Set the idle screws so both carbs draw the same amount of air. You can use a carb balancing tool or a bit of hose and your ear, you'll hear the suction. Lock the carbs together, MAKE SURE you end up with them opening at the same time, you can get big throttle variations by badly adjusting the forks, the pin should be central in the fork.

Then screw the jets down until you get the maximum idle speed, and lean them off a couple of flats once you've found it. Then use the lift pins. what you are looking to achieve is that when you lift the piston the revs just lift, and the idle then drops a feew hundred rpm. If the idle goes up, its too rich, engine dies too lean. As I said earlier, lift rear piston, adjust front carb.If one carb needs drastically different jet height from its neighbour there is something wrong.

If at the end you re-set the idle just uncouple the carbs, having them operating perfectly in sync really helps throttle response.






USERNAME
Use "claim to be" below if you don't want to log in.
PASSWORD
I don't have an account. Sign me up.
CLAIM TO BE
Use only if you don't want to login (post anonymously).
ENTER CAPTCHA CODE
This is required for posting anonymously.
OPTIONS notify by email
Available only to user accounts.
SUBJECT
MODEL/YEAR
MESSAGE

DICTIONARY
LABEL(S) +
IMAGE URL *
[IMAGE LIBRARY (UPLOAD/SELECT)]

* = Field is optional.

+ = Enter space delimited labels for this post. An example entry: 240 muffler


©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.