I pulled the air box out of my 'new' 1975 MK III and replaced it with standard slip-on filters. But when I put it all back together, it won't start. It will fire a couple times, but not run. Using the tickler buttons does cause fuel to flow, and I installed new spark plugs just to make sure. I'm guessing that somehow a carb jet got plugged, or something like that, while I had it apart, and I'm going to take it back apart to look for issues. But I admit that I'm not sure what to do with the manifold balance tube that previously attached to the oil-tank breather apparatus. Should I plug it, or let it breath, or what? It started OK and ran pretty well before my doctoring, and the only change I made was the filter (I also tried starting it with no air filter at all), so I can't imagine what the problem would be other than some Amal 932 carb issue.
Intake manifold balance tube?
- Thread starter oediehl
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- Jan 27, 2008
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Deets55 said:
Exactly right.
On earlier bikes the nipples are just joined to each other by a short hose (my '67, '69 and '73 are hooked up this way). Without those nipples connected, you've got a massive vacuum leak.
You could also leave the original tubes in place and put a rubber nipple plug on the 'tee', but a piece of rubber hose is simpler
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