Question about 1981 Yamaha XJ 650

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Linkage to choke and excelerator dont operate, when linkages are pulled nothing in carbs move is this right. engine as been stood for 5 years i beleave.

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  • Yamaha Master
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It will have CV carbs, called constant velocity.
The cable and linkages open the butterflies on the intake side, the slides wont move until the air flow through the oval looking hole at the top causes the diaphrams to lift the slides.
you should be able to lift the slides individually with your finger , and they will drop down again.
I think the chokes lift a plunger in each carb, and is called an enrichening device, as it opens another jet to richen it for cold starts,the choke does not work the same way as a car ar a standard slide carb.

Posted on Apr 05, 2011

Testimonial: "hi thanks for the info its took a load off my mind. Ive never heard it run i bout it as a trike project with a xj 650 front end the wiring is mess as "

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