20 Most Recent 1990 kawasaki VN 750 Vulcan Questions & Answers

no spring in the grip!
id suspect the cables are binding up inside so disconnect at the carby end then & see if they are moving freely
Cheers Rob

lightly shake the handle to the right.while unlocking.dont pressure it

Have 4lit standing by.Pour inside 2,5lit and start the engine and let it idle for 5 minutes.Then turn off the engine and add as much more as it needs to see the normal level (In the middle of the two lines) covered on the dipstick or the glass window.

Usually if you flood it (by overchoking), you open the throttle wide open (to draw in more air to lean the mixture) while cranking starter. Beings you had the spark plugs out you could have cranked it then, and let the engine compression blow the excess gas out the spark plug holes.

that means your mixer screw r to high find the screws then wind them right in and then wind them out 5 turn at first then 1 after that then that should be it and then u r on your way

Without buying the manual...
Try www.bikebandit.com/

Hi Todd: Sounds suspiciously like it would be brake fluid. Check to see if it is connected to the rear brake master cylinder. (that's the thing that has a shaft that is connected to the brake pedal) Motorcycles like Grade 4.

There's a black plastic knurled knob under the left side of the gas tank that adjusts idle speed.

fuel comes out of air filters????!! no, definitely wrong

Your clutch is either out of adjustment or it's fried.

CHECK WIRING CONNECTIONS ARE NOT LOOSE .

Hi.

I have just sent you a comment on a different thread. I see that you posted the same question on separate thread. I am also posting here as I do not know if you are following both thread. Better to keep the problem on a single thread. Below my previous comment:

Hi.

There is no "diagram" showing the whole routing of fuel lines in the bike. You need to use different diagrams in Fuel System section of the service manual. Fuel system section starts at page 15 in service manual, but what you really need starts at page 40. I have posted fuel service manual at the end of comment.

There is one forum where users discussed the routing. One user has colored the diagram from service manual to indicate lines routing. Here the diagram:



Here the forum, I quote:

"The red and yellow are the fuel lines that go to the petcock. The green one you left unmarked also goes to the petcock. The line with a question mark is a vacuum line that connects to a part in front of the battery along with the larger lines to the cylinders."

Here the service manual in PDF format.

Regards.

Ginko

Just measure the voltage at the battery with the engine idling - in a normal system you should have around 14.2 volts. If its lowerthan that you will need to measure the voltage given by the stator, it should be above 14 volts AC. if you get that then the rectifier is defective, if you get less it's the stator itself.
Beware, the stator should be the 6 wire version, the cheap chinese copies, with 5 wires, are *******, they don't deliver more than 13 volts so it can't charge the battery.

If the problem worsens as the engine gets warmer, than it is mostly likely running too rich...The engine uses more fuel at start up when its cold, so if its running rich there will be more fuel than is necessary when it warms up. Lean the fuel mixture a bit.----------- Also other possibility is faulty starter relay, the relay getting stuck when engine warmed and releases when engine is cold.Check the starter and starter relay.If all checked ok, then battery is the issue.Try with another battery, this will confirm the problem.This will help. Thanks.Helpmech.

sounds like a dodgy earth either reseat the one you have or drill a new one

Hope this helps

John

first fuses
then wiring jammed or damaged near steering head.
possibly the switch block

Look at the sidewall of both tires. There will be a 'MAX PSI' embossed on the tire. It will probably say Max 45 PSI. At 45psi the bike will ride like a rock. At 15psi it will ride really squirrely. Find a psi at which you feel the bike handles well and rides well. One rider may weigh 125 pounds and the next rider may weigh 300 pounds. The best psi for each rider will be different due to weight. Chances are that 30 to 35 psi will do the trick. Please rate my answer. Thanks!

That could be caused by excessive endfloat on the starter motor.
Remove the motor and check it. Alternatively, the engine may be stiff to turn or a poor connection on the starter motor circuit.

Hi, firstly dont think for a miniute that the black wire on your new light is the earth, using the battery as a power source put one of the wires to earth and the other to live, as the led light will only work if the power is conected to the rite pole it is important to establish wich of the new wires is earth, you may have to swap them around to get the correct order, and then conect each of the other wires to the batt poss to check the lite works,when you are happy you have the correct order you can fit it to the bike, on the kawasaki blk and yellow is earth , although you have 6wires they are only 3wires in the loom wich double up to 6 for the 2 bulbs in the lite unit, you can leave 1 of eah colour disconected,