Road Star Forum
Welcome, Guest
Please Login or Register.    Lost Password?
Re:Choke/carb doesn't work properly
Go to bottom Post Reply Favoured: 0
TOPIC: Re:Choke/carb doesn't work properly
#1022048
BobStar32 (User)
Fresh Boarder
Posts: 6
graphgraph
User Offline Click here to see the profile of this user
Choke/carb doesn't work properly 1 Week, 2 Days ago  
Hi Guys,

I have a 01 RS, purchased in May. Always started well, since a week I have a problem with choke and carb. The bike is hard to start if I pull choke knob as I always made it won't start at all. The only way to make the motor run is to start with throttle WOT w/o any choke. I have to hold the gas to let it warm if I try with the choke it stall even when the engine is hot.
I have a stock air filter, v&h long shot installed, not sure if jetting has been changed by the last owner.

Someone had that problem before or know what could make this to happen suddenly? I'm not very familiar with carbed engine
 
Logged Logged  
  The administrator has disabled public write access.
#1022050
SKWEARpeg (User)
Platinum Boarder
Posts: 12732
graphgraph
User Offline Click here to see the profile of this user
Gender: Male Location: Milton, Florida Birthdate: 1958-00-00
Re:Choke/carb doesn't work properly 1 Week, 2 Days ago  
Since it's an 01, and it was working fine before but now is starting to show rich symptoms at the start, and a need to roll the throttle wide open, I'll say you should replace the needle and seat(float valve). It sounds like either there is a leak where the needle contacts the seat, or more then likely, the oring that seals the seat is leaking.
A new needle and seat will come as a set, with the new oring on the new seat.
 
Logged Logged  
  The administrator has disabled public write access.
#1022051
G_Conway (User)
ScrewBird
Platinum Boarder
Posts: 1009
graphgraph
User Offline Click here to see the profile of this user
Gender: Male Location: San Diego, CA. Birthdate: 1955-05-12
Re:Choke/carb doesn't work properly 1 Week, 2 Days ago  
I would also check your fuel filter to see if it's clogged.

You didn't say if you have a fuel pump, or have gone pumpless.

You could also have a blockage (crap in the tank)

I would disconnect the fuel line at the carb and see what flows out as a start.
 
Logged Logged  
 

Gerry
  The administrator has disabled public write access.
#1022054
BobStar32 (User)
Fresh Boarder
Posts: 6
graphgraph
User Offline Click here to see the profile of this user
Re:Choke/carb doesn't work properly 1 Week, 2 Days ago  
G_Conway wrote:
I would also check your fuel filter to see if it's clogged.

You didn't say if you have a fuel pump, or have gone pumpless.

You could also have a blockage (crap in the tank)

I would disconnect the fuel line at the carb and see what flows out as a start.



I still have the fuel pump.
I will take a look, but I don't see why a bad fuel filter or crap in the tank can have an effect on that. Bike still pull as always been and throttle response is good. In my mind, the bike will starve with a clogged filter... But I'm not an expert, this is why I asked.

SKWEARpeg wrote:
Since it's an 01, and it was working fine before but now is starting to show rich symptoms at the start, and a need to roll the throttle wide open, I'll say you should replace the needle and seat(float valve). It sounds like either there is a leak where the needle contacts the seat, or more then likely, the oring that seals the seat is leaking.
A new needle and seat will come as a set, with the new oring on the new seat.


It makes sense I'll check for it tonight after work.
 
Logged Logged  
  The administrator has disabled public write access.
#1022058
davej (User)
Platinum Boarder
Posts: 17913
graphgraph
User Offline Click here to see the profile of this user
Gender: Male Location: Toledo Ohio Birthdate: 1957-00-00
Re:Choke/carb doesn't work properly 1 Week, 2 Days ago  
Do you turn your fuel valve "Off" when you turn the bike off? If not try shutting it off and that will help verify what SP said above. If it starts back up normally the next time you start it then you know the fuel is leaking by the float needle/seat when parked. Everything you said points in that direction.
 
Logged Logged  
 
dave
  The administrator has disabled public write access.
#1022062
G_Conway (User)
ScrewBird
Platinum Boarder
Posts: 1009
graphgraph
User Offline Click here to see the profile of this user
Gender: Male Location: San Diego, CA. Birthdate: 1955-05-12
Re:Choke/carb doesn't work properly 1 Week, 2 Days ago  
Sorry, I was reading your post as no fuel until WOT. I see you thing it's flooding and WOT is just for more air.
 
Logged Logged  
 

Gerry
  The administrator has disabled public write access.
#1022084
BobStar32 (User)
Fresh Boarder
Posts: 6
graphgraph
User Offline Click here to see the profile of this user
Re:Choke/carb doesn't work properly 1 Week, 2 Days ago  
Tonight, I had time to search for the problem. When I took off the air filter, there was fuel drop continuously leaking from the bigger bottom hole in line of the needle. I guest this is the needle problem described by SKWEARpeg.

I will check to order all the parts involved in the needle.

By the way, I think Im gonna go pumpless. Any pro and con???
 
Logged Logged  
  The administrator has disabled public write access.
#1022085
Pankster (User)
the joy of the journey is in the ride
Senior Boarder
Posts: 307
graphgraph
User Offline Click here to see the profile of this user
Gender: Male Location: Imperial,Ne Birthdate: 1953-04-15
Re:Choke/carb doesn't work properly 1 Week, 2 Days ago  
Had the same problem a few years back and it was the o-ring on the seat. Took it in not knowing that but also knew it was over jetted. Yamaha shop (a good one) rejetted, replaced needle valve and seat, cleaned accelerator pump, dynoed and it runs fantastic ever sense. I shy away from ethanol whenever possible and never premium.
 
Logged Logged  
 
  The administrator has disabled public write access.
#1022142
BobStar32 (User)
Fresh Boarder
Posts: 6
graphgraph
User Offline Click here to see the profile of this user
Re:Choke/carb doesn't work properly 1 Week, 1 Day ago  
I ordered my Grizzly needle valve assy to go pumpless.

I checked the tech article, as I understand he used another hose to re-route from fuel filter to carb. Is there any problem to still use the original metal piping ?
 
Logged Logged  
  The administrator has disabled public write access.
#1022148
SKWEARpeg (User)
Platinum Boarder
Posts: 12732
graphgraph
User Offline Click here to see the profile of this user
Gender: Male Location: Milton, Florida Birthdate: 1958-00-00
Re:Choke/carb doesn't work properly 1 Week, 1 Day ago  
Get a piece of 5/16 fuel injection rated fuel line. 2 foot is more then enough. Use the wire wrap on the old set up, to protect the new fuel line. There will be enough.
Keep the hose as short as possible. Run it from the petcock to the carb inlet.
I like to put a simple screen filter like the ff1203 from Autozone, about 3 inches from the petcock.
Be careful when removing the bowl and changing the needle and seat, not to mangle the float setting.
 
Logged Logged  
  The administrator has disabled public write access.
Go to top Post Reply
Powered by FireBoardget the latest posts directly to your desktop
...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... ...................................................................... -->
New Forum Posts




The Road Star Clinic is a collaborative community of riders who archive and publish user contributed technical data about Yamaha Road Star motorcycles.

We also sponsor the creation and support of other community websites similar to our own. Inquiries about availability of a website for your community can be submitted to us via any "Contact Us" option on the Clinic.

Copyright 2003-2007 Road Star Clinic and its respective authors. Road Star Clinic is sponsored by the folks at MLSHomeQuest.com.