can't run air filters?

yamahog · Posted: August 22, 2006, 9:21 pm Post subject: can't run air filters?

Hey bro"s

I changed engines,took 2 carbs and made 1. bike runs great until I put the carbs on. Any ideas?

xsjohn · Posted: August 22, 2006, 9:28 pm Post subject: Re: can't run air filters?

Spose you ment air clearners. Would have to be to rich. Floats
mainjets? Mismatched slides and needles? Just guessing.
I left some pilot jets out of some cargs last week, what a mess that was. What kind of aircleaners. Some just cause to much restriction.
Old Yamaha Mechanic John Underwood

jayel · Posted: August 23, 2006, 12:26 am Post subject: Re: can't run air filters?

you took two sets of carbs and used them to rebuild one set - what kind of jetting are you using? there is a difference between early/late model carb jets

jimdi · 650Rider Supporter Joined: Oct 27, 2005 Posts: 512

just out of curiosity - pull the breather hoses off the carb boxes and see how she runs.
If she runs ok - put on a breather filter on the breather hose - and plug the open connectors on the air boxes.

On my bike the breather was richening up my mixture.

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Yamaha xs650