Question about 2002 Yamaha Road Star

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Just bought bike i know 0 about its history when it runs its way to lean need choke on to run

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Sounds like time for a thorough carb cleaning. Also check the rubber for tears, pin holes and cracks in the diaphragm. While you are in there, clean the air filter and stick in a fresh set of spark plugs.

Posted on Mar 27, 2011


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1 Answer

Only runs with choke on

Hi, Jeff and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting ***** set too low.
8. Air/fuel mixture ***** set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
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.
What could be wrong if bike will only run on choke
Only Runs When Choke is On
Bike only runs with choke on Intake Jetting Fuel Injection
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Apr 05, 2016 | Red Motorcycles

1 Answer

Bike runs better with the choke on?

You have an enrichener not a choke on your intruder. Most bikes are set up very lean so when you enrichen or increase fuel they run better. Has your bike been stored for a long time? Your jets could be partially clogged.. pour a qualty fuel cleaner in your tank like Lucas, Berrymans, or Techroline by Chevron. Also if you have modified your air cleaners you will run lean and need to re-jet..

Apr 25, 2014 | 1995 Suzuki VS 800 Intruder

1 Answer

I have a 1999 Nomad when I am riding down the road and my temp light will comes on and the bike wants to stall out, I let up on th ethrottle and teh light goes off, also when I hit a bump the same thing...

Symptoms of a bike running VERY lean. You should never have to ride with the choke on AT ALL.And running a bike lean,causes iit to overheat,and overheat FAST! Has the exhaust or air filter/box been modified? This is classic symptoms of an extremely lean running bike,and my solution would be to buy a jet kit,take the carbs off and clean them,install the correct larger jets,and synch the carbs. You dont wanna ride this bike like that,or you risk burning a piston.

Sep 27, 2012 | kawasaki Motorcycles

1 Answer

2002 suzuki savage

I just bought the same bike. I had to choke it hard to even get it to start. Seemed as if it was running lean. It sputtered under acceleration and would die when I pushed the choke in. My first step I filled the tank the tank with 93 octane gas. This is a high compression motor. After gas swap my bike jumped out of it's skin. No more choking and very smooth through the power band and does not sputter no more. A totally different bike from then

Jul 26, 2012 | 2002 Suzuki LS 650 Savage

1 Answer

2001 Honda VT 1100 C2 Shadow Sabre Running Lean

I have a 2007 Honda Shadow Sabre VT1100 and I also put after market pipes on it from Vance and Hines. I also have to keep it choked when first starting and sometimes even hold the throttle a bit while it warms up. The bike has two carburetors and the best solution I have found by lots of asking around of mechanics and bike folk is to get it rejetted through Dyno Jet. It is meant for bikes with after market exhausts and much less back pressure from the lack of those stiffling baffles in the stock pipes. I have also noticed the power loss in the middle torque range and backfiring because of the bike running in a lean condition. The Dyno Jet website is a good place to find the correct set and corresponding part number, but then I suggest finding a cheap place online so you avoid retail price :) Hope this helps. Oh, and don't forget to buy two kits...we have two carburators in our bikes.

Mar 09, 2012 | 2001 Honda VT 1100 C2 Shadow Sabre

2 Answers

Runs good at idle wont rev after quater thottle bogs .revs good if choke is on

HI,,,you have blocked carbs,,they are running lean,thats why it runs better with the choke on,,carbs need to be removed from the bike disasembled and cleaned.

Apr 20, 2011 | 1977 Suzuki GS 750

2 Answers

1995 Kawasaki Ninja 250 will only run with the choke on

you have blocked jets in the carbs,,the carbs need to be removed and cleaned.

Mar 20, 2011 | 1995 kawasaki ZX-9R Ninja

2 Answers

Front cylinder running lean and rear almost as bad.light brown spot rest white on plug on rear and solid white on front cylinder Fuel injected 1997 electra glide classic. with Bassani true duals and...

1997 fuel injected FLHTC? Hmm. Did not know they had FI that year.

Anyway, the DynaJet sytem needs to be enrichened up a little. The open exhaust probably contributed to the lean running too.

May 13, 2010 | 2000 Harley Davidson FLHT Electra Glide...

1 Answer

Exaust change

colder plug for NGK. Should I stay with that plug or go with a hotter plug ? That's really ... weird. You have to use the choke ... which indicates you went lean The old exhaust needed no choke shich indicates rich... But you went back to stock which should, by normal standards, make the bike run RICHER if the jet sizes were increased,,,

Nov 10, 2008 | 2008 Benelli Tre-K 1130 Amazonas

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