Vacuum take offs, curvy carbs

[garynortheast]

In addition to fitting a Scottoiler I'm going to balance the carbs. I'm assuming that the vacuum pipe I will use for the Scottoiler is the same one (on the rear carb) as the one I'd use in conjunction with the front vacuum take off for balancing (if that makes sense :confused: ).

I seem to recall someone posting a thread and pictures of the balancing process and the location of the vacuum pipes but I can't find it now despite searching. If anyone can point me in the right direction of the thread I'd be most grateful.

Also, can anyone tell me what the i/d of the vacuum pipe should be please.

Thanks....

[johnnyrod]

I guess you've tee'd into the rear vacuum pipe? As this is the one that works the fuel tap. I'd tee in a second time (so the gauge, fuel tap, Scottoiler and carb are all connected) but try to use short extra bits of pipe. Can't remember the ID, 5-6mm? Rear carb is easy to find of course, front one is a pig to get at, once you've got the airbox off then look downwards at the front of it on the right-ish side, I think around the 1 or 2 o'clock position, the stub has a black rubber cap on it. You'll need the airbox off to access the balancing adjuster, whicih is part of the linkage between the two carbs on the left side of them, at the back near where the rear vacuum pipe goes onto the carb. It's got springs on it.

[_Stretchie_]

I measured the pipe on Squirrels bike and am pretty sure it was 5mm ID and 9mm OD

[yorkie_chris]

When balancing just take the tap/scottoiler pipe off the carb spigot to connect your gauge and suck on it every 20 seconds or so to give it a bit more juice.

Multiple Ts and such is a bit complicated for my liking and you don't really need to

[garynortheast]

Thanks very much guys, all good useful information. I'm hoping to get out there this w/e and get the jobs done (and clean the bike - it looks luck a muck spreader at the moment!).

[johnnyrod]

Know what you mean YC, I try to keep everything as close as possible to what it's like without the gauges attached, maybe I'm worrying too much.