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dbleon

FCR carb problem

6 posts in this topic

Hey all, ive been fine tuning my FCR carb and everything was ok, but today i went to change the clip position on the needle, and i rotated the throttle as i always do to bring the needle up, but this time i rotated the throttle a little too much and the little box (sorry dont know the name) fell off the two arms that lift it. So i put the box back on the lifters and now when i turn the throttle it gets stuck at the top, and is limited to only a small turn. It is also very rough. Has anyone had a similar problem??? Im sorry if the description is a little wierd. Any help would be greatly appreciated. Thanks

:thumbsup::devil::smirk: :smirk:

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Sounds like its in backwards or perhaps not all 4 of the black rollers are intact. I would unscrew the one screw that holds the slide roller arms and take the slide out completely to make sure all rollers are right. Look at the carb picture in your manual or on-line for reference.

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The rollers are all intact, but i'm starting to think somthings wrong with the roller arms...what could go wrong here??? Bent???

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Same thing happened to mine and it was due to the shop I bought it from cut the throttle stop screw way to short. If you take the cover off the side of the throttle pulley/cam, I could see it would rotate to far and go past where the accelerator pump spring arm (probally not the right term) would hold it open and not let it come back. I pressed the spring forward and the throttle returned., installed a yz throttle stop and have not had a problem since.

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Same thing happened to mine and it was due to the shop I bought it from cut the throttle stop screw way to short. If you take the cover off the side of the throttle pulley/cam, I could see it would rotate to far and go past where the accelerator pump spring arm (probally not the right term) would hold it open and not let it come back. I pressed the spring forward and the throttle returned., installed a yz throttle stop and have not had a problem since.

Good thing you didn't stick that throttle wide open in a bad spot. Some shops can get away with anything!

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