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Throttle body vacuum tube

drswift

New member
I picked up an old 1150RT project bike. When I went to balance the throttle bodies I discovered no tube, just caps underneath both sides. I thought I remembered there being one on my last 1150? Where does it originate on the bike? Is there supposed to be one on both sides? (Schematics don't show much.)
 
The charcoal canister is either gone or disconnected. The tubes run to a T and then to the right rear canister...if it is there
 
It was only on US models and a large percentage of bikes are missing them. On occasion they got plugged and backwashed carbon the wrong way anyways
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