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V-SIX DS#121
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« on: March 22, 2016, 10:00:01 AM » |
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I have a 1997 tourer and have a possible vacuum leak. What is the best way to check vac and also hose placement . By looking I have a hose on petcock, intake tube on 3,4.and 6, and a hose on rear of tank. Help please.  |
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pancho
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« Reply #1 on: March 22, 2016, 10:51:53 AM » |
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Pull those lines off and look at the condition V-SIX,, also the other three intake tubes have caps on them,, pull them to check their condition. If they are failing it will be obvious.
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The most expensive things you will purchase, are those things you would not have needed if you had listened and obeyed.
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hubcapsc
Member
Posts: 16781
upstate
South Carolina
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« Reply #2 on: March 22, 2016, 11:17:20 AM » |
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That's a vent hose out the back of the tank, it's supposed to have a vacuum leak  ... If you have a hard time finding good vacuum caps, I learned here about making your own from a half inch piece of vacuum line with a proper sized little bolt hose clamped into it - I used those crummy vinyl caps from the auto parts store for a while, and later replaced them all with new OEM caps. There's O-rings on the bottoms of all the chrome intake runners, if there's "chewing-tobacco" stains around the base of any of the runners, you might want to replace the O-rings too... it is real easy to reach in there where the caps and lines are if you have an intake runner out... -Mike |
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xman
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« Reply #3 on: March 22, 2016, 03:24:17 PM » |
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Mike, what exactly is the intake runner part? In this procedure do you remove the air box, or leave it connected to the 6 carbs? If the air box is still in place do you lift it up a bit?
Thanks, almost got it.
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V-SIX DS#121
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« Reply #4 on: March 22, 2016, 03:32:55 PM » |
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Pull those lines off and look at the condition V-SIX,, also the other three intake tubes have caps on them,, pull them to check their condition. If they are failing it will be obvious.
Thanks |
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hubcapsc
Member
Posts: 16781
upstate
South Carolina
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« Reply #5 on: March 22, 2016, 04:15:29 PM » |
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Mike, what exactly is the intake runner part? In this procedure do you remove the air box, or leave it connected to the 6 carbs? If the air box is still in place do you lift it up a bit?
Thanks, almost got it.
The six chrome tubes between the carbs and the top ends... -Mike |
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RonW
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« Reply #6 on: March 23, 2016, 10:31:17 PM » |
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These thingies ..... replete with telltale tobacco stains.  |
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2000 Valkyrie Tourer
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Tfrank59
Member
Posts: 1364
'98 Tourer
Western Washington
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« Reply #7 on: March 24, 2016, 08:37:30 AM » |
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I also have slight "tobacco stains" but I don't think I have any vacuum leaks. Wouldnt I see a performance drop and the engine running rough?
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-Tom
Keep the rubber side down. USMC '78-'84
'98 Valkyrie, ‘02 VTX 1800, '96 Royal Star, '06 Drifter, '09 Bonneville, '10 KTM 530, '04 XR 650, '76 Bultaco, '81 CR 450, '78 GS 750...
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hubcapsc
Member
Posts: 16781
upstate
South Carolina
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« Reply #8 on: March 24, 2016, 09:12:33 AM » |
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I also have slight "tobacco stains" but I don't think I have any vacuum leaks. Wouldnt I see a performance drop and the engine running rough?
It happens slow. A year or so ago, I went after a couple of tobacco stains. I changed the O-rings and the vacuum line to the petcock (it was stiff and old) and all the caps on the backs of the runners. My bike is de-smogged, so that covered most of the vacuum issues. I couldn't tell anything was wrong with the way it ran before, but I could tell it ran better after... EDIT: I remember now, I changed the spark plugs that day too... http://www.valkyrieforum.com/bbs/index.php/topic,63362.0.html-Mike |
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« Last Edit: March 24, 2016, 09:17:24 AM by hubcapsc »
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The emperor has no clothes
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« Reply #9 on: March 24, 2016, 09:55:16 AM » |
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I also have slight "tobacco stains" but I don't think I have any vacuum leaks. Wouldnt I see a performance drop and the engine running rough?
As Mike said, it's ever so slight. I didn't notice any rough running or anything on either bike. I just didn't like the looks of it and having to clean it. It's a very easy job.  |
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pancho
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« Reply #10 on: March 24, 2016, 10:52:27 AM » |
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"I couldn't tell anything was wrong with the way it ran before, but I could tell it
ran better after..."
+ 1
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The most expensive things you will purchase, are those things you would not have needed if you had listened and obeyed.
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Tfrank59
Member
Posts: 1364
'98 Tourer
Western Washington
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« Reply #11 on: March 24, 2016, 12:58:43 PM » |
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I also have slight "tobacco stains" but I don't think I have any vacuum leaks. Wouldnt I see a performance drop and the engine running rough?
As Mike said, it's ever so slight. I didn't notice any rough running or anything on either bike. I just didn't like the looks of it and having to clean it. It's a very easy job. OK, by "easy job" does that mean not removing the carbs and air box? |
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-Tom
Keep the rubber side down. USMC '78-'84
'98 Valkyrie, ‘02 VTX 1800, '96 Royal Star, '06 Drifter, '09 Bonneville, '10 KTM 530, '04 XR 650, '76 Bultaco, '81 CR 450, '78 GS 750...
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The emperor has no clothes
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« Reply #12 on: March 24, 2016, 01:46:36 PM » |
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I also have slight "tobacco stains" but I don't think I have any vacuum leaks. Wouldnt I see a performance drop and the engine running rough?
As Mike said, it's ever so slight. I didn't notice any rough running or anything on either bike. I just didn't like the looks of it and having to clean it. It's a very easy job. OK, by "easy job" does that mean not removing the carbs and air box? Yes. When do mine I do one at a time. Remove the 2 bolts holding intake runner, loosen clamp above runner and pull it out. Probably the hardest thing is keeping the the new o-ring in place when reinstalling it. I used just the slightest dab of RTV to keep it in place. |
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V-SIX DS#121
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« Reply #13 on: March 24, 2016, 04:21:23 PM » |
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Thanks for all,the help, guys  |
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Tfrank59
Member
Posts: 1364
'98 Tourer
Western Washington
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« Reply #14 on: March 24, 2016, 07:28:13 PM » |
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I also have slight "tobacco stains" but I don't think I have any vacuum leaks. Wouldnt I see a performance drop and the engine running rough?
As Mike said, it's ever so slight. I didn't notice any rough running or anything on either bike. I just didn't like the looks of it and having to clean it. It's a very easy job. OK, by "easy job" does that mean not removing the carbs and air box? Yes. When do mine I do one at a time. Remove the 2 bolts holding intake runner, loosen clamp above runner and pull it out. Probably the hardest thing is keeping the the new o-ring in place when reinstalling it. I used just the slightest dab of RTV to keep it in place. OK thanks good to know because I'm pretty chicken to get into those carburetors  |
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-Tom
Keep the rubber side down. USMC '78-'84
'98 Valkyrie, ‘02 VTX 1800, '96 Royal Star, '06 Drifter, '09 Bonneville, '10 KTM 530, '04 XR 650, '76 Bultaco, '81 CR 450, '78 GS 750...
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DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« Reply #15 on: March 25, 2016, 10:07:11 AM » |
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You all forgot that there are also 6 Bulk Hose Vacuum lines (Part #95005-35001-20M) one on the side of each Carb. When I first got my bike it was running poorly, I first checked all the typical vacuum lines mentioned above to find them okay. I found all 6 Bulk Hose Vacuum lines ends were rotted and cracked. I replaced them all and the bike ran good.
FYI - you don't have remove the carbs to inspect the bulk hose vacuum lines. Look on the right side of each carb. It's small tubing only 2.5" long.
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« Last Edit: March 25, 2016, 10:19:08 AM by DarkSider »
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263  |
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TW
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« Reply #16 on: March 25, 2016, 12:43:57 PM » |
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I always learn something when I read this forum. Just had my 97 valk tourer triked which means I am Committed to taking care of all the maintenance issues that come up long term. I do have tobacco stains on one cylinder. Didn't know what it was or why. Now I do. I appreciate this site.
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hubcapsc
Member
Posts: 16781
upstate
South Carolina
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« Reply #17 on: March 25, 2016, 01:08:48 PM » |
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You all forgot that there are also 6 Bulk Hose Vacuum lines (Part #95005-35001-20M) one on the side of each Carb. When I first got my bike it was running poorly, I first checked all the typical vacuum lines mentioned above to find them okay. I found all 6 Bulk Hose Vacuum lines ends were rotted and cracked. I replaced them all and the bike ran good.
FYI - you don't have remove the carbs to inspect the bulk hose vacuum lines. Look on the right side of each carb. It's small tubing only 2.5" long.
Good call... the little hoses that go to the cut valves... I've never messed with those... I remember reading about some folks replacing their cut valves... $50 each! -Mike |
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rosevalk
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« Reply #18 on: August 09, 2016, 02:38:38 PM » |
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Just got done putting intake o rings, 3 new vac hoses, 1 to the petcock, new spark plugs, WOW! I DIDNT NO WHAT I WAS MISSING, The valk will get with the program now. forgot to put a spark plug boot back on, and thought i really messed something up, put it back on and yeeeehaw. 60 dollar fix and a little time consuming for the first time, but i wouldnt hesitate to do it.. found 3 cracks in old hoses..
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