Question about Yamaha Motorcycles

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Sea foam for a motorcycle. My Yamaha runs at about 16 hundred rpms. But at idle It runs's down to about 9 then 8 then 7 then stalls out. Will sea foam help

I'm SAL. 2005 Yamaha 650 vstar custom Just started happening

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  • Yamaha Master
  • 30,375 Answers

It will clean up your carbs somewhat. i use it in every engine driven device i own except my cars...maybe you need to set your idle speed a bit higher???

Posted on Sep 14, 2019


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Posted on Jan 02, 2017

  • 162 Answers

SOURCE: my truck idles rough but when im on the gas runs

That is a random misfire code that could be because of low compression in 2 cylinders. Check compression in each.

Posted on Oct 14, 2009

  • 376 Answers

SOURCE: '96 Vulcan, valve tapping at low rpm. Oil level

You need to have the valves adjusted. If they are not done soon you will have to replace more parts. Also do a oil change and filter change.

Posted on Nov 29, 2009

  • 30 Answers

SOURCE: Ford Taurus 2005 model. Too high rpms in idle.

check tps senser

Posted on Feb 11, 2010

  • 151 Answers

SOURCE: 96 f150 4.9l miss or skip at idle new plugs wires

This sounds like a vacuum leak or a timing issue.

Posted on Apr 05, 2010

  • 1508 Answers

SOURCE: i have an 05 v star 1100 custom that backfires

back fire,bogs down and choke required means it is lean.
Check fuel filter, fuel tap
intake air leaks, loose clamps, cracked rubber
vacumn hose off
valve clearance
loose jets in carb \dirt in carbs
part of a carb coming loose , like the top cap

The back fire can be because of carbon fouled plugs, caused by the choke on.
air intake leaks can sometimes be found by spraying WD around intake rubbers,while running and listening for engine change.
The rest is mainly visual inspection and adjusmnet

Posted on May 07, 2010

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1 Answer

How to fix my Daewoo leganza from idleing roughly

Change air filter,clean injectors with sea foam/,also look for vacuum leaks.Here's a link to Seafoam. Walmart Sea Foam Motor Treatment 16 oz

May 17, 2015 | Daewoo Leganza Cars & Trucks

1 Answer


.... Robert Grove
johnallen496, when you say it stalls at low speeds and stops, do you mean when slowing down and coming to a stop? does it stall at low speeds while the car is moving with your foot on the pedal just a little like when driving through a parking lot?...

I used the wrong box above, oh well ....

The most common cause of stalling at low speeds, especially idling and decelerating to a stop is carbon buildup. The throttle plates get coated with carbon closing down the opening slightly, this affects the idle speed, causing the engine to stall at idle and coming to a stop.

also carbon builds up in the cylinders and absorbs fuel intended to be burnt, leaning out the mixture and causing rough/low idle and stalling - especially when the engine is cold. Dirty injectors can cause the same symptoms/results

As a maintenance routine It's good to have the throttle plates cleaned and perform a top engine de-carbon treatment, and fuel injection service in more severe cases

Sea Foam makes a spray that works great for minor de-carbon service, just spay it into the throttle plates while it is running, one to two cans will do, add a can of Sea Foam or Techron to the gas tank each time you fill up for the next few tank full's.

If you still have problems sek out a qualified professional

Good luck!

Robert Grove, WEGO2U Mobile Mechanics
Orange County Mobile Mechanic Orange County Mobile Mechanics 714 709 4594

Feb 17, 2014 | 2006 Dodge Charger

1 Answer

Mikuni bds28

Hi, Anonymous go through your carburetors and keep doing the Sea Foam thing for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Cleaning Star 650 Carburetors
How to clean yamaha star 650 carburetor 1 of 6
98 00 Yamaha XV650 Star Service Manual XVS650 Moto Data Project
OEM parts for Yamaha

Btw, I’m available to help over the phone in case u need at

Aug 22, 2013 | 2007 Yamaha V Star Classic

1 Answer

My 2007 1100 wont stay running at low speed or idle without full choke

Idle jets are pluged up take off carbs and clean jets there are two jets in each carb put back together put some sea foam in gas tank It is a cleaner Get it at auto parts store Good luck MOPAR KENNY

May 21, 2011 | Yamaha V Star Classic Motorcycles

1 Answer

Engine will run ok from cold but once warm particularly in traffic the engine will misfire and stall. on the open road when the trottle is open at speed there is no evidence of any problem until travelling...


There could be several things that would cause your problem;

Wrong spark plug gap - too wide
CDI - The capacitive-discharge ignition uses capacitor discharge current output to fire the spark plug.
Bad gas

I would start by stabilizing your fuel to see if this is the issue. Buy a can of Sea Foam and a bottle of Sta-bil fuel stabilizer. Follow the directions on both of these items when filling your tank (use both together). Use premium fuel when filling up for this time. Run a full take through your system. When filling up again, you may use a lower grade of fuel if you want, but use the Sea Foam again. The Ethanol added to fuel these days can cause valve deposits that will lead to engine issues. You don't have to use the Sea Foam in every tank of fuel you buy - just use it once or twice a month.

Hope this helps. If you find this information helpful, please vote on this post.



Jan 14, 2011 | Yamaha YZF 750 R Motorcycles

1 Answer

Bike will run ,but will not idle old gas was in but was drained new gas was added with a some sea foam treatment and was run for about 30 miles but it still will not idle down

Sounds like you have a clogged jet. remove carbs and jets and clean. and DO NOT I REPEAT DO NOT use sea foam. It really doesnt clean anything.

Oct 12, 2010 | 2004 Yamaha V Star Classic

1 Answer

05 1100 shadow, does not idle right. runs great on road.

Try putting some Sea Foam additive in the gas . Let it idle for a few minuets, then go for a nice long ride.
Sea Foam can be found at your NAPA dealer or Wal-Mart. Be careful not to add to much. Follow the directions.

Nov 18, 2009 | 2005 Honda VT 1100 C2 Shadow Sabre

1 Answer


there might be a problem in your fuel line. try buying a can of sea foam [Red and white bottle.Available at any auto place. Around $9]. pouring about half in the tank and the other half thru a line in your brake booster or another vacuum line. the line will be under the hood to the very top right. it should be black, round, and two lines coming out of it. do this with the car running so maybe have someone else hold the gas to about 1500 RPM. Slowly drip the sea foam in until it almost dies then put your thumb on the line to keep it running. keep doing that until the can is almost or fully empty. Let the car sit for about 5 mionutes then start the car and keep the RPMs to about 2 grand. There will be smoke fromt the exhaust SO DONT WORRY! Just keep on the gas until the smokes clears. If that doesnt help let me know!

Oct 18, 2009 | 1991 Nissan Maxima

1 Answer

How to clean a carburetor on a 2006 kawasaki vulcan 800.

If the bike is still running your in luck. Just go to your local auto parts store and get a can of Sea Foam and dump about half the can in with a couple gallons of gas. fire it up and let it idle for awhile until it get a good carb full. Then procede to ride it Hard and you should start to feel the results very quickly. I recently revived an old honda that had been setting for 16 years that same way. I just let the Sea Foam set in the carb over night and went riding the next day. ( Old time mechanics secret carb rebuild.0 Its been around for 60 years or so. Have fun.

Oct 05, 2009 | 2005 kawasaki VN 800 Vulcan Classic

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