Petcock Vacuum Line Location on bike, NOT THE TANK
08-12-2012 | 08:40 AM
#1
Thread Starter
Junior Member
Squid
Joined: Jul 2012
Posts: 2
Petcock Vacuum Line Location on bike, NOT THE TANK
Newb with a question on where the vacuum line is attached to the airbox/cylinder head (?) not the tank. The forum has been very helpful with the PVLIR regarding the inadvertent re-install on the tank, but I just have no clue where that vacuum line leads!
I'm rebuilding a bike that was disassembled by someone who never thought of labeling anything
thanks for your help!
I'm rebuilding a bike that was disassembled by someone who never thought of labeling anything
thanks for your help!
08-12-2012 | 09:07 AM
#2
Out of my mind, back in 5
MotoGP
Joined: Nov 2006
Posts: 6,109
From: Skurup, Sweden
Well, if you are talking about the vacuum line for the petcock, it connects to the front cylinder, down in the V... Throttle hand side of the bike, roughly by the overflow bottle for the coolant...
But really, the best way for you to figure it out, is to download the service manual that is linked on this site... It has decent images to go by...
But really, the best way for you to figure it out, is to download the service manual that is linked on this site... It has decent images to go by...
08-12-2012 | 10:00 AM
#3
Senior Member
Superstock
Superstock
Joined: Apr 2007
Posts: 293
Hmmm. Not attempting to be contradictory, but on mine, it attaches to the rear cylinder. Also, in my US manual, is shows having the machine screw in the front port, where you need to attach a nipple to sync the carbs. Been thinking about buying a little extra vacuum hose and just t-ing them together, so I dont have to deal with that tight space each time I go to sync them.
08-12-2012 | 03:41 PM
#5
Senior Member
SuperBike
Joined: Sep 2008
Posts: 1,707
From: Essex, UK
There are two places - front is blanked off by default with a small allen bolt* - rear is tucked away as described earlier
*While you're in there install an adapter & some hose (blanked off) for easy carb balancing.
*While you're in there install an adapter & some hose (blanked off) for easy carb balancing.
08-13-2012 | 04:54 AM
#6
Senior Member
Back Marker
Back Marker
Joined: Sep 2011
Posts: 144
From: Sofia, Bulgaria
will use the thread to share something weird
when was remoing my front cylinder head due to cct failure i noticed that the vacuum hose from the rear cylinder was not connected to the petcock...it was connected to the rear cylinder, but the other end was not connected anywhere, it was left free
My bike uses a fuel pump, so the vacuum is not needed but would this "free" vacuum hose mess my engine performance?The bike was runing good before the cct failure, but it was new for me so i cannot say if it was best it can do,
when was remoing my front cylinder head due to cct failure i noticed that the vacuum hose from the rear cylinder was not connected to the petcock...it was connected to the rear cylinder, but the other end was not connected anywhere, it was left free
My bike uses a fuel pump, so the vacuum is not needed but would this "free" vacuum hose mess my engine performance?The bike was runing good before the cct failure, but it was new for me so i cannot say if it was best it can do,
08-13-2012 | 12:54 PM
#7
Banned
MotoGP
Joined: Aug 2007
Posts: 5,942
From: Lake View Terrace, CA
will use the thread to share something weird
when was remoing my front cylinder head due to cct failure i noticed that the vacuum hose from the rear cylinder was not connected to the petcock...it was connected to the rear cylinder, but the other end was not connected anywhere, it was left free
My bike uses a fuel pump, so the vacuum is not needed but would this "free" vacuum hose mess my engine performance?The bike was runing good before the cct failure, but it was new for me so i cannot say if it was best it can do,
when was remoing my front cylinder head due to cct failure i noticed that the vacuum hose from the rear cylinder was not connected to the petcock...it was connected to the rear cylinder, but the other end was not connected anywhere, it was left free
My bike uses a fuel pump, so the vacuum is not needed but would this "free" vacuum hose mess my engine performance?The bike was runing good before the cct failure, but it was new for me so i cannot say if it was best it can do,
You still need the fitting for sync'ing so a fitting, if it doesn't have one, and a rubber cap and you will be set.
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