1979 Yamaha XS 500 - Page 8 - Answered Questions & Fixed issues

This will all depend on whether your bike is fitted with carburettors or a direct fuel injection system. Is this idle speed change a new problem? Sudden idle changes could be a sign of another issue. When was it last serviced? A dirty air or fuel filter can cause idle issues. Engines that use a carburettor, (Carb), usually have an idle adjustment screw on the carb itself. I would recommend getting an expert to do this as adjusting carbs can be a tricky job. Direct injection systems are usually not adjustable without using specialist equipment.

Contact a Yamaha dealer or an auto parts store to inquire.

Titen all connections..also clean if needed. Also inspect n test ignition components. Ur not gittn proper spark or the timing has slipped. Get a haynes or clymer repairmanual for detail

Buy a clymer or haynes shopmanual for complete detail

Maybe. But ithink the contact gear has issue. Getta repairbook or search utube

Question edited for clarity. Question moved to Yamaha Motorcycles. Replace the Starter Relay. https://www.google.com/search?q=yamaha+majesty+yp125e+starter+relay+location ..

Check out the link. Lots of information https://www.google.com/search?q=2006+Yamaha+RS+Vector+hand+warmers+fuse ..

limited info generic answer idle adjustment --fuel delivery problem filter or if has fuel pump

Any QUALITY conventional 10w - 30 in winter, and if gets HOT where you live 10w - 40 in summer..

No, its supposed to have a "plug" in the head,, If memory serves, its a 17 or 19 mm hex plug with threads the same as your correct spark plug, Having a spark plug in there does not hurt anything as long as the "reach" is correct!

There are three things to make an internal combustion engine run, 1- a properly timed spark 2 - Adequate compression 3 - Proper fuel/air mixture .... this is provided all internal parts are in proper working order.. put the correct main jet and pilot jet back in to start, and then take the carb to a professional mechanic and have him clean and set it.

Need more info.. what ratio??

Put the old plug back in it and see if it still does it? Was the plug the same make, type and number? Was it correctly gapped? Cap on securely? Please always include year, make, model in all questions.

NGK BP7ES

Battery electrolyte is at it's lowest performance when temperatures are low, and things like rusty earth strap connections or corroded terminals all add to poor starting performance. My advice is to put a freshly charged battery in the bike and check all electrical connections for cleanliness and tightness. Spray contact cleaner on those connections after checking them.

As has been explained previously, the most common float level check is done with the carby off the bike and held in the horizontal plane, using a piece of tubing on the fuel inlet and gently blowing in the tube while at the same time raising and lowering the float to find the point at which you cannot blow into the tube. The float should be sitting in a horizontal position at that point. If it isn't you need to adjust the tab that locates the needle valve that shuts off the fuel. This is a rule of thumb adjustment only.

Under the saddle, near the battery box.

U need a datastream run w afactory tool to display values. The ignition parts are probly wearing out along w fuel system. Purchase a clymer or haynes rebuild guide this wk

No, everything is firmly held in place by shafts. https://www.google.com/search?q=yamaha+venture+royal+remove+oil+pan ..

The jets probly need ajust. Ucud hav dirty aircleanr causin them to clog. Also chec floatlevel setting. Buy a clymermanual for total repair&rebuild for that model