Yamaha roadstar 1600

SOURCE: vaccum line routing on the carburetors of a 1985 yamaha xj700

There's only two , on the Ca. model , sitting on the bike second cylinder from left, the synching port goes to the petcock -on the carb joint nearest the block- It would be the only boot without a black cap n a spring clamp .And (it'll be a long hose) goes to the emissions can behind the air box on the right from the carb itself.(it has a plastic cover over it) Anything behind the carbs (between 1n2 then 3n4 ) is over flow tubes to the bottom of the frame.

SOURCE: 1985 Yamaha xj700 Maxim- Carb. fuel lines

yes, the breather line hooks to the petcock on the line facing the back, the fuel line hooks to the larger one. the line from the breather is actually a vacume line that turns on the fuel, without it you will not get fuel out of the petcock unless it is in the prime position.

SOURCE: How do you check the oil in a 2003 yamaha roadstar

all bike are to be checked in the upright position! then find out how much the bike takes from your manual if you dont have a manual ...do the following ..when you just change oil and not filter you will be adding less oil,"almost" all bikes take @ 3 quarts oil minimum, so what i do to be safe!! is always after draining is put in two quarts no problem, but with the third bottle i only pour in half.. drop oil cap back on and start the bike and let it run for a minute, the turn it back off, then check oil level, if it doesn't register anything on the stick or sight glass then your o.k. to add the rest. now take a reading, and only fill to almost full, i always under fill my bikes, because over filling will cause damage to internal bearing by the air bubbles from the splashing of the crank in the oil pan. Same as cars.
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Thanks

David Belcher

• 1978 Answers
• Posted on Jan 28, 2011

SOURCE: My 2001 yamaha roadstar makes a clicking noise

When you push the starter button you hear a click , so you know the button is working. Follow the positive battery cable to the starter solenoid. Take a wire and jump the two posts on the solenoid or touch the two cables together. If your starter works, then you need a new solenoid. If you hold the starter button and tap on the starter with a plastic hammer and the starter works you need new starter brushes. Anything else wrong with the starter and you need to replace the starter assembly , the manufacturer does not make replacement parts for the starter.

SOURCE: Working on a friends 81

The petcock on these bikes is vacuum operated, which means that there are two hoses that go to it. The thicker hose is the fuel line and it runs from the thick port on the petcock to the fuel input on the carburetor rack. The fuel input on the carburetors is located between the number two and number three carburetor bodies. If you aren't sure which is the fuel connection, just turn the petcock switch to prime for a second and you will see gas come out of the fuel connection.

The thinner hose on the petcock is a vacuum line. It runs from the vacuum port on the #3 cylinder (between the carburetor body and the engine) up to the smaller connection on your petcock. When the engine is turning vacuum is applied to this thinner line and allows fuel to run from the tank into the carburetors.


There are the only two lines that should run to your petcock, and the fuel line should not be split anywhere between the petcock and the carburetors.

Good Luck,
-Josh

Testimonial: "Thank you for the feedback, It was very helpful. I had been told that both ports on the intake were to be plugged, which added to my confusion, Ted"