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Discussion Starter #21
Sorry, found it in the manual. It connects to a small nipple on the back side of the petcock which I never noticed before. I hooked it up but didn't expect any change which I confirmed. I think I'm going to break the rack of carbs down and go through them all. When I put them back together, I will swap #3 with another and see what comes of it. Thanks
 

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Discussion Starter #23 (Edited)
It was not hooked up, but since I kept removing/replacing the carbs, I was just using PRI on the petcock to fill them and quickly run the bike.

You're question made me think of something. I just went out to the garage and switched the petcock selector to ON. The bike started right up on choke and ran for a few minutes, but then started running rough and stalled. It would start up again, but rolling the throttle on would stall it. So, it looks like there is not enough vacuum being pulled on #3? Would this change the diagnosis of carb at all?
 

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Interesting. It would have been interesting also to see if you moved the petcock tube to one of the other carbs if you had the same result. That would definitely have pointed to a carb/vacuum issue. While the carbs are off maybe a check on the valves to verify clearances/health there as well.

Check the carb sticky in this forum for a good source for all the seals/bushings/o-rings for the carbs.
 

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Discussion Starter #26
On my bike, only #3 carb intake holder has a nipple, so not sure I could have done that extra test.

While I wait for the carb parts to arrive, I might as well check the valve clearances. Thanks, that's a good suggestion.
 

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Split the rack and broke all the carbs down. Next step - order rebuild kits and bath in the sonic cleaner.
That picture brings back memories... I only have one carbed bike ATM, which hasn't run in at least two years; but I'm extra careful to drain everything when I park it to avoid that. I know where you're coming from, its very time consuming and frustrating to go through all of that just to reinstall them and have the same issue.
 

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Discussion Starter #28
I measured tappet clearance. They were all over the place. Looks like I have to pull the cams which I never like doing. Shim under bucket style sucks.
 

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Discussion Starter #29
I should have all the shims today and will install the cams and re-check tappet clearance. The carbs are clean and I'm waiting for gaskets and o-rings from Thailand. Hopefully they'll land here next week.
 
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