Starting Enrichment (aka Choke) Valves - Question
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Starting Enrichment (aka Choke) Valves - Question
I'm hoping to get some feedback from folks who have cleaned their carbs.
I have my carbs off and am in the process of cleaning them up. One of the problems I think I need to worry about is my choke. I seem to recall that the choke lever on the left handlebar used to go all the way down while now it barely moves. With the carbs off, I can see that this is due to the limited movement of the choke bracket. The choke bracket is limited by the little peg thingies on the side of each carburetor, which do not currently move. If they're supposed to move, is it possible to free these guys up?
Can you confirm...
1) does your choke lever have a long range of motion? (more than a half inch?)
2) with the carbs off, does the bracket actually cause the little valve pegs to move? (again, my bracket does not seem to cause any real parts to move
3) has anyone corrected this problem? How much effort is involved in getting the valves to move again?
I have my carbs off and am in the process of cleaning them up. One of the problems I think I need to worry about is my choke. I seem to recall that the choke lever on the left handlebar used to go all the way down while now it barely moves. With the carbs off, I can see that this is due to the limited movement of the choke bracket. The choke bracket is limited by the little peg thingies on the side of each carburetor, which do not currently move. If they're supposed to move, is it possible to free these guys up?
Can you confirm...
1) does your choke lever have a long range of motion? (more than a half inch?)
2) with the carbs off, does the bracket actually cause the little valve pegs to move? (again, my bracket does not seem to cause any real parts to move
3) has anyone corrected this problem? How much effort is involved in getting the valves to move again?
Thread Starter
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Junior Member
Joined: Sep 2009
Posts: 9
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Well good news to report on this task. I was able to restore full range of motion.
1. Carbs were already off the bike. they are NOT separated.
2. I do have the diaphragms off, but I'm not sure if this is necessary.
3. Remove the choke bracket (be careful of the little spring that's under one of the screws)
4. One carburetor at a time,
- remove the little black hex cap thing (small 10mm open end wrench). there's a spring under the cap, so be careful.
- once the cap and spring are out, use needle nose pliers to pull on the end of the Starting Enrichment valve (it has a little notch on the end where the bracket pulls on it).
- clean the valve and clean out the hole where the valve lives (q-tips with carb cleaner worked nicely)
- reassemble. VERY important. the service manual says the torque on the black cap is 1.4 ft-lbs. it's plastic... and not very thick plastic. and be careful not to cross thread it.
5. reassemble the bracket.
I think it took about 1.5 hours with the carbs and diaphragms already off (I cleaned some other parts too). so no sweat really on this one. man one of those buggers was stuck in there. Hopefully the piping is not clogged, but I'm thinking 50/50. Reason #3001 not to let your bike sit for a long time.
1. Carbs were already off the bike. they are NOT separated.
2. I do have the diaphragms off, but I'm not sure if this is necessary.
3. Remove the choke bracket (be careful of the little spring that's under one of the screws)
4. One carburetor at a time,
- remove the little black hex cap thing (small 10mm open end wrench). there's a spring under the cap, so be careful.
- once the cap and spring are out, use needle nose pliers to pull on the end of the Starting Enrichment valve (it has a little notch on the end where the bracket pulls on it).
- clean the valve and clean out the hole where the valve lives (q-tips with carb cleaner worked nicely)
- reassemble. VERY important. the service manual says the torque on the black cap is 1.4 ft-lbs. it's plastic... and not very thick plastic. and be careful not to cross thread it.
5. reassemble the bracket.
I think it took about 1.5 hours with the carbs and diaphragms already off (I cleaned some other parts too). so no sweat really on this one. man one of those buggers was stuck in there. Hopefully the piping is not clogged, but I'm thinking 50/50. Reason #3001 not to let your bike sit for a long time.
Last edited by d.r.; Nov 23, 2009 at 06:35 PM.
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