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08-06-2016, 12:54 AM,
#1
High revving at stop except in neutral (intermittent)
Hey, I have a 2007 v star 1100.

I adjusted the fuel thumb-screw and the idle seemed great within the city. After hitting the highway, at a stop, the bike started revving really high while I was grabbing the clutch until I put it in neutral then it sounded great.

It's happening on and off. After one ride I was going to adjust the thumb-screw on the carb but it started sounding good again.

I heard it could be one of a couple things:

1) Choke is sticking and I should lube the cable
2) Carb might be dirty

Second question: is it advisable to get some sort of solution/additive to clean out the carbs? If so, what?

Thoughts?
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08-07-2016, 11:16 AM,
#2
RE: High revving at stop except in neutral (intermittent)
Hey @Goatzilla welcome to the forum!

I had a similar problem with my 07 1100 when I first bought it used. Changed the oil and filter. She would start fine, but after she warmed up she would idle really high when pulling in the clutch to stop. After doing some digging on the subject I decided to sync the carbs. I wasn't sure when it had been done last. I started by tuning my idle while the bike was cold. Then after warming her up I synced the carbs and re-tuned the idle. I took off the AIS while I was at it, but I don't think that had anything to do with it. After that she ran smooth as silk. I did run some seafoam through the intake (there's a process to do that), then some through a tank of gas for good measure. Not a problem since.

I hope this helps.
'07 1100 Custom; Cobra Pipes, Kuryakyn Hypercharger
Reply
08-07-2016, 02:49 PM,
#3
RE: High revving at stop except in neutral (intermittent)
(08-07-2016, 11:16 AM)Kimura Wrote: Hey @Goatzilla welcome to the forum!

I had a similar problem with my 07 1100 when I first bought it used. Changed the oil and filter. She would start fine, but after she warmed up she would idle really high when pulling in the clutch to stop. After doing some digging on the subject I decided to sync the carbs. I wasn't sure when it had been done last. I started by tuning my idle while the bike was cold. Then after warming her up I synced the carbs and re-tuned the idle. I took off the AIS while I was at it, but I don't think that had anything to do with it. After that she ran smooth as silk. I did run some seafoam through the intake (there's a process to do that), then some through a tank of gas for good measure. Not a problem since.

I hope this helps.
Thanks. Yeah, I was thinking of using Seafoam or a similar product. You mean the fuel intake? How complicated is syncing the carbs? I'm at beginner level for moto repairs/maintenance but am learning.
Reply
08-07-2016, 04:52 PM,
#4
RE: High revving at stop except in neutral (intermittent)
when an engine is revving it's getting air from someplace, it can't race up on fuel alone it needs air, that's why when choked it will only race until it warms up and then it starts stumbling because there isn't enough air to mix with the extra fuel
Lightbulb dumb bikers don't get to be old bikers
Reply
08-08-2016, 10:32 AM, (This post was last modified: 08-08-2016, 10:43 AM by Kimura.)
#5
RE: High revving at stop except in neutral (intermittent)
(08-07-2016, 02:49 PM)Goatzilla Wrote:
(08-07-2016, 11:16 AM)Kimura Wrote: Thanks. Yeah, I was thinking of using Seafoam or a similar product. You mean the fuel intake? How complicated is syncing the carbs? I'm at beginner level for moto repairs/maintenance but am learning.
I used this video as a reference for the seafoam treatment.
https://youtu.be/qcBslr8ri8Q
However, I didn't put as much in the tank. I only put about 8-10 cap fulls. I would also recommend letting it sit for at least an hour if not over night.

Synching the carbs is often overlooked as a remedy to a lot of pretty common problems. It should be done anytime the bike starts to run... funky. It can seem intimidating to do at first, but it's really pretty easy. Here's another link that can help you out with it.
http://www.vstarforum.com/Carb-Sync-Easi...100-Thread

Here's a great article that talks about the when, why, and how of carb synching. http://www.motorcyclecruiser.com/how-to-...ut-balance
@Goatzilla @pauli466
'07 1100 Custom; Cobra Pipes, Kuryakyn Hypercharger
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08-08-2016, 12:30 PM, (This post was last modified: 08-08-2016, 12:46 PM by Goatzilla.)
#6
RE: High revving at stop except in neutral (intermittent)
(08-07-2016, 04:52 PM)pauli466 Wrote: when an engine is revving it's getting air from someplace, it can't race up on fuel alone it needs air, that's why when choked it will only race until it warms up and then it starts stumbling because there isn't enough air to mix with the extra fuel
True enough.

(08-08-2016, 10:32 AM)Kimura Wrote:
(08-07-2016, 02:49 PM)Goatzilla Wrote:
(08-07-2016, 11:16 AM)Kimura Wrote: Thanks. Yeah, I was thinking of using Seafoam or a similar product. You mean the fuel intake? How complicated is syncing the carbs? I'm at beginner level for moto repairs/maintenance but am learning.
I used this video as a reference for the seafoam treatment.
https://youtu.be/qcBslr8ri8Q
However, I didn't put as much in the tank. I only put about 8-10 cap fulls. I would also recommend letting it sit for at least an hour if not over night.

Synching the carbs is often overlooked as a remedy to a lot of pretty common problems. It should be done anytime the bike starts to run... funky. It can seem intimidating to do at first, but it's really pretty easy. Here's another link that can help you out with it.
http://www.vstarforum.com/Carb-Sync-Easi...100-Thread

Here's a great article that talks about the when, why, and how of carb synching. http://www.motorcyclecruiser.com/how-to-...ut-balance
@Goatzilla @pauli466
This is really helpful, appreciated. I'm adding this to the list of things to check lol. Will try one more time adjusting the idle screw (easiest option) + seafoam, then will also check air filter, cables, and eventually carb sync.
Reply
08-08-2016, 05:17 PM,
#7
RE: High revving at stop except in neutral (intermittent)
(08-08-2016, 12:30 PM)Goatzilla Wrote:
(08-07-2016, 04:52 PM)pauli466 Wrote: when an engine is revving it's getting air from someplace, it can't race up on fuel alone it needs air, that's why when choked it will only race until it warms up and then it starts stumbling because there isn't enough air to mix with the extra fuel
True enough.

(08-08-2016, 10:32 AM)Kimura Wrote:
(08-07-2016, 02:49 PM)Goatzilla Wrote:
(08-07-2016, 11:16 AM)Kimura Wrote: Thanks. Yeah, I was thinking of using Seafoam or a similar product. You mean the fuel intake? How complicated is syncing the carbs? I'm at beginner level for moto repairs/maintenance but am learning.
I used this video as a reference for the seafoam treatment.
https://youtu.be/qcBslr8ri8Q
However, I didn't put as much in the tank. I only put about 8-10 cap fulls. I would also recommend letting it sit for at least an hour if not over night.

Synching the carbs is often overlooked as a remedy to a lot of pretty common problems. It should be done anytime the bike starts to run... funky. It can seem intimidating to do at first, but it's really pretty easy. Here's another link that can help you out with it.
http://www.vstarforum.com/Carb-Sync-Easi...100-Thread

Here's a great article that talks about the when, why, and how of carb synching. http://www.motorcyclecruiser.com/how-to-...ut-balance
@Goatzilla @pauli466
This is really helpful, appreciated. I'm adding this to the list of things to check lol. Will try one more time adjusting the idle screw (easiest option) + seafoam, then will also check air filter, cables, and eventually carb sync.
some one was saying berrymans was better than seafoam for cleaning carbs cheaper too. berrymans is more tailored for the job.
2007 1100 custom,cobra longs and pods,doubled clutch spring.
Reply
08-08-2016, 05:58 PM,
#8
RE: High revving at stop except in neutral (intermittent)
(08-08-2016, 05:17 PM)nick59 Wrote:
(08-08-2016, 12:30 PM)Goatzilla Wrote:
(08-07-2016, 04:52 PM)pauli466 Wrote: when an engine is revving it's getting air from someplace, it can't race up on fuel alone it needs air, that's why when choked it will only race until it warms up and then it starts stumbling because there isn't enough air to mix with the extra fuel
True enough.

(08-08-2016, 10:32 AM)Kimura Wrote:
(08-07-2016, 02:49 PM)Goatzilla Wrote:
(08-07-2016, 11:16 AM)Kimura Wrote: Thanks. Yeah, I was thinking of using Seafoam or a similar product. You mean the fuel intake? How complicated is syncing the carbs? I'm at beginner level for moto repairs/maintenance but am learning.
I used this video as a reference for the seafoam treatment.
https://youtu.be/qcBslr8ri8Q
However, I didn't put as much in the tank. I only put about 8-10 cap fulls. I would also recommend letting it sit for at least an hour if not over night.

Synching the carbs is often overlooked as a remedy to a lot of pretty common problems. It should be done anytime the bike starts to run... funky. It can seem intimidating to do at first, but it's really pretty easy. Here's another link that can help you out with it.
http://www.vstarforum.com/Carb-Sync-Easi...100-Thread

Here's a great article that talks about the when, why, and how of carb synching. http://www.motorcyclecruiser.com/how-to-...ut-balance
@Goatzilla @pauli466
This is really helpful, appreciated. I'm adding this to the list of things to check lol. Will try one more time adjusting the idle screw (easiest option) + seafoam, then will also check air filter, cables, and eventually carb sync.
some one was saying berrymans was better than seafoam for cleaning carbs cheaper too. berrymans is more tailored for the job.
Yeah, I heard Berryman's is great. All just speculation on my part right now, have to try and see how it works. There is a product Honda makes which you spray into the air intake; was recommended that (by Honda). Anyone have experience with spray carb cleaners? Also added to fuel.
Reply
08-11-2016, 11:58 AM,
#9
RE: High revving at stop except in neutral (intermittent)
I recently heard from someone that maybe it's the timing. Anybody have experience with this? That would make sense since the idle goes down in neutral.
Reply
08-11-2016, 04:48 PM,
#10
RE: High revving at stop except in neutral (intermittent)
https://sites.google.com/site/vstar1100k...carburetor sinc the carbs,i used the yardstick method
2007 1100 custom,cobra longs and pods,doubled clutch spring.
Reply
08-24-2016, 06:42 PM, (This post was last modified: 08-24-2016, 06:48 PM by pauli466.)
#11
RE: High revving at stop except in neutral (intermittent)
(08-08-2016, 05:58 PM)Goatzilla Wrote:
(08-08-2016, 05:17 PM)nick59 Wrote:
(08-08-2016, 12:30 PM)Goatzilla Wrote:
(08-07-2016, 04:52 PM)pauli466 Wrote: when an engine is revving it's getting air from someplace, it can't race up on fuel alone it needs air, that's why when choked it will only race until it warms up and then it starts stumbling because there isn't enough air to mix with the extra fuel
True enough.

(08-08-2016, 10:32 AM)Kimura Wrote:
(08-07-2016, 02:49 PM)Goatzilla Wrote:
I used this video as a reference for the seafoam treatment.
https://youtu.be/qcBslr8ri8Q
However, I didn't put as much in the tank. I only put about 8-10 cap fulls. I would also recommend letting it sit for at least an hour if not over night.

Synching the carbs is often overlooked as a remedy to a lot of pretty common problems. It should be done anytime the bike starts to run... funky. It can seem intimidating to do at first, but it's really pretty easy. Here's another link that can help you out with it.
http://www.vstarforum.com/Carb-Sync-Easi...100-Thread

Here's a great article that talks about the when, why, and how of carb synching. http://www.motorcyclecruiser.com/how-to-...ut-balance
@Goatzilla @pauli466
This is really helpful, appreciated. I'm adding this to the list of things to check lol. Will try one more time adjusting the idle screw (easiest option) + seafoam, then will also check air filter, cables, and eventually carb sync.
some one was saying berrymans was better than seafoam for cleaning carbs cheaper too. berrymans is more tailored for the job.
Yeah, I heard Berryman's is great. All just speculation on my part right now, have to try and see how it works. There is a product Honda makes which you spray into the air intake; was recommended that (by Honda). Anyone have experience with spray carb cleaners? Also added to fuel.
if you look at what's in carb cleaner not the spray cleaner just the stuff you pour in the tank you'll see the main ingredient is naphtha which is just white gas colman fuel was naptha until 1950 but today its a different formulation no naphtha. behlen naphtha solvent is still available, mixing seafoam or the like with fuel doesn't do a whole lot, because the cleaner needs to soak into the carbon or crud to soften it. if take seafoam or the like and pour some at full strength onto the carbon on top of a piston or combustion chamber it take quite some time to soften it enough to wipe it off. so in my opinion the quickest way to clean the carb orifices is to remove the bowls and blast some carb cleaner through everything reachable, hold the slides up while blasting the cleaner through the main jets, the pilots are tough to clean you may need to remove em to get em and poke a wire through the holes to rally clean them, in my experiences with carbs running a cleaner mixed with fuel through the carbs may help but not for very long, the carb usually start messing up again and can strand the rider, so if you don't want that to happen clean them the right way and install a new filter, i know on my 650 i can remove the tank and carb bowls in under a 1/2 hour so it's not that tough to do, the most important thing when working on carbs is using a bit on the brass screws that fits right, i'v never had a problem getting the screws out with the right bit and a hand impact driver. a lot of people can't find the right bit and keep going anyway, and then complain when the screw head stripps, if the screw heads are already banged up you may need to cut a slot in the head, and like i said with a tightly fitting bit those will come right out too. keep in mind when you come off the highway the engine is very hot and hot engines can get overly lean and a overly lean engine can take a while for the idle to stabilize i'll bet your when your engine is racing after exiting the highway it the idle begins to settle down as the engine gets cooler, to correct this you can open the pilot mixture screws another 1/4 to 1/2 a turn
Lightbulb dumb bikers don't get to be old bikers
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