Topic: Sticking throttle valve (CB175)

[yourfirekiller]

Hi all,

I picked up a non-running CB175 and I've gotten it to fire up, and run, but it revs super high because the left carb is acting up.

When I close the throttle, the left side throttle valve sticks open about halfway. When I pull the top of the carb off, I can push the valve closed with a screwdriver, but it won't fully close on its own, it feels like it's sticking.

I've pulled the carbs off and cleaned them, and even did some light polishing with a dremel to remove any gunk that may be obstructing the throttle valve chamber, but maybe I didn't do a good enough job?

Any help would be appreciated!

[grcamna2]

I think you should look at your twist grip,throttle cables(especially the junction where they go from 2 into 1..),etc.

[Old Scrambler]

Its somewhat common for the slide to stick after a bike has been sitting.  Yes, check the cable. Also, the carb-body may be warped.......usually the result of over-tightening the manifold flanges.........or just old fuel deposits.  Look for marks on the slide and try to match the location with the inside of the body.......then emmory-cloth both for a smooth finish. On re-assembly, apply some misting-oil or graphite-spray.