peter
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« on: April 04, 2016, 02:00:30 PM » |
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ok, Valk carbs have 3 jets, but only the pilot jet is adjustable as the other 2 just screw all the way in.
I've read here that the proper adjustment for the stock pilot jets is somewhere from 1 1/2 to 2 1/2 turns back out from fully seated. So how come mine were all 4 turns out??? And it runs pretty good although not where I want it. Some minor popping just off idle, and a tired carb somewhere - I'm going to use a vacuum gauge to find out which one.
Thanks for your thoughts Peter
desmogged '98 Tourer
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'98 Valk '56 BSA '04 Ducati
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peter
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« Reply #1 on: April 04, 2016, 02:33:57 PM » |
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...and the better question would be, what's the best way to adjust these pilot jets? Back them in or out to where it runs best? I would think it might be hard to hear any difference since there are 6 carbs. Is there a bonifide "starting point"? ie, turn them all out 2 turns and take it from there?
Thanks again. Peter
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'98 Valk '56 BSA '04 Ducati
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Patrick
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Posts: 15433
VRCC 4474
Largo Florida
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« Reply #2 on: April 04, 2016, 04:16:28 PM » |
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It sounds as if you have 35 low jets and someone has ben playing with them. Usually the initial setting is 1.75 and setting them at 2.25 turns seems best. Set them and forget them.
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peter
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« Reply #3 on: April 04, 2016, 06:33:57 PM » |
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Thanks Patrick, are the 35 low jets the ones that came with the bike?? If not, why would someone switch them out?
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'98 Valk '56 BSA '04 Ducati
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John Schmidt
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Posts: 15223
a/k/a Stuffy. '99 I/S Valk Roadsmith Trike
De Pere, WI (Green Bay)
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« Reply #4 on: April 04, 2016, 06:44:58 PM » |
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Thanks Patrick, are the 35 low jets the ones that came with the bike?? If not, why would someone switch them out?
Yes, 35's are the OEM slow jets. Most, like myself, switched to 38's to help prevent clogging with the lousy gas being sold now. I installed mine some years back and set the pilot jets at 2 turns out, then did a carb sync and haven't touched them since. Runs fine for me, didn't affect my mileage and I've never had the first indication of them clogging up, can't say that for the 35's that came on the bike. Others may voice a different opinion which is fine, just relating my experience. The larger slow jets don't add any performance, just more confidence you're not going to plug them up if you can't ride for an extended period. Over the years I've had to let my bike sit for a few months at a time, keeping the battery peaked during that time. I'd finally be able to ride so I'd unhook the charger, hit the starter and away she goes. It would take a couple minuted for it to settle down but them ran smooth.
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peter
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« Reply #5 on: April 04, 2016, 07:05:02 PM » |
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Thanks John - is there a spec or guideline for stock slow 35's with respect to turns from seated? Is the conventional wisdom that they vary within Patrick's approximate range of 1.75 to 2.25? I'm wrestling with what to do with mine - leave them as I found them at 4 turns out, or set them at 2. It looks like a chore doing it with the carbs on the bike - I don;t have the special tool, just sawed slots...
Thanks man.
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'98 Valk '56 BSA '04 Ducati
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peter
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« Reply #6 on: April 04, 2016, 08:18:46 PM » |
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Read more about it - I'm going with 2 1/4 turns....
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'98 Valk '56 BSA '04 Ducati
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John Schmidt
Member
    
Posts: 15223
a/k/a Stuffy. '99 I/S Valk Roadsmith Trike
De Pere, WI (Green Bay)
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« Reply #7 on: April 04, 2016, 08:26:18 PM » |
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If you have sawed slots in the heads of the pilot jets you're lucky, you don't need the special tool which I found to be a pain to use. That makes it much easier to adjust them. It also makes me wonder if the jets may have been changed. As for adjusting the pilots, my hands are too big to get in there without some help. I'll usually loosen the six bolts for the intake runners on one side, don't remove them. Go to the other side and remove one or two of the intake runners, depending on how much room you need to get in there. I use a small screwdriver bit in a small 1/4" socket, using a light and a mirror, I'll get the bit in place and turn the pilots in until seated. Then back each one out to no more than two turns out. Set each one the same number of turns, then sync the carbs. Once done with one side, replace the intake runners you removed, install the bolts but leave them loose and move to the other side and do the same thing. With the bolts loose, it lets you lift the carb bank a little, giving more room. Some people remove the rubber runners as well, personal choice.
2 1/4 is pretty rich actually, even with stock 35's in there.
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Steel cowboy
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Moving ahead so life won’t pass me by.
Spring Hill, Fl.
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« Reply #8 on: April 04, 2016, 09:46:17 PM » |
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I set my stock (35) interstate pilots to 2.25 from a light sitting, after the carb rebuild and de-smog. I have had no need to read-a-just them since. I did buy the pilot adjustment tool and had to file the sides down a bit to get it to sit into the pilot jet adjusters. Ride Safe.
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2001 black interstate 2003 Jupiter Orange wing
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peter
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« Reply #9 on: April 05, 2016, 06:15:04 AM » |
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Thanks Boys, I think I'm on the right track and will adjust them to 2 1/4 turns out if I can and see how it runs.
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'98 Valk '56 BSA '04 Ducati
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97BLKVALK
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Posts: 637
VRCC#26021
Detroit Lakes, MN
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« Reply #10 on: April 05, 2016, 07:16:37 AM » |
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Peter,
I would also recommend a vacuum sync on the carbs too. Where are you located? That part of your profile is missing.
Michael
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All that is necessary for the triumph of evil is that good men do nothing.
1997 GL1500C - Black 1997 GL1500C - Purple 1997 GL1500C - Bumble Bee 1998 GL1500C - Blue and Cream
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Patrick
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Posts: 15433
VRCC 4474
Largo Florida
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« Reply #11 on: April 05, 2016, 08:13:59 AM » |
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Yes, 35s are the original size. 4 turns open is quite a bit, I wonder why it was done, aftermarket exhaust maybe. 4 turns would be quite rich, 2.25 is a bit rich, but, these monsters run rich.
I'd recommend running it a bit if it hasn't been run for awhile. Then a sync would be in order, the sync is the last to be done after any changes are made. A plain single vacuum gauge [ with vacuum hose, forceps, plastic T, golf T's ] works just fine for this.
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salty1
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"Flyka"
Spokane, WA or Tucson, AZ
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« Reply #12 on: April 05, 2016, 12:18:22 PM » |
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Peter,
I would also recommend a vacuum sync on the carbs too. Where are you located? That part of your profile is missing.
Michael
 The digi sync is absolutely a wonderful instrument to sync your carbs. A very good investment IMO.
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My rides: 1998 GL1500C, 2000 GL 1500CF,2006 GL 1800 3A  
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Blackduck
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« Reply #13 on: April 05, 2016, 04:44:46 PM » |
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Peter, There is a starting point and that is 2 1/4 turns. (2 3/8 in some parts of the world) As for hearing changes , Honda specs using an accurate tacho. All explained in the manual under Pilot screw adjustment, a long process and why most just pick a setting and leave it if running OK Cheers Steve
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2001 Standard, 78 Goldwing, VRCC 21411
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John Schmidt
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Posts: 15223
a/k/a Stuffy. '99 I/S Valk Roadsmith Trike
De Pere, WI (Green Bay)
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« Reply #14 on: April 05, 2016, 08:15:24 PM » |
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Peter, if you're bike is basically stock, I'd really recommend just two turns out to start with. Plus, setting it for two full turns is easier and much more accurate than trying to match all six at 21/4....that last 1/4 turn will vary quite a bit unless you're really careful...and talented. 
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