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1981 yamaha enticer 300 won't start

Only runs briefly on starting fluid. Has fuel and spark

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

rselvy
  • 83 Answers

SOURCE: location of serial numbers on a yamaha 340 enticer?

There are 2 sets of serial numbers one set on the motor and one on the frame. The ones on the frame are on the "gooseneck", (where the triple clamps to your forks are connected). The other set on that motor are on the center cases on the top of the engine. As I recall they are just above the left side engine cover.

Posted on Dec 09, 2008

  • 8 Answers

SOURCE: 1981 Yamaha xj750rh that is hard to start

your idle/primary(pilot jet) circuit is blocked.Clean the carbs or have them professionally cleaned and put the starting fluid away.

Posted on Mar 28, 2009

tabbycat282
  • 56 Answers

SOURCE: 1989 tw200 yamaha won't start

G'day egdbcs . Ok.now lets see.You say good spark,so i'm presuming you are doing the old sight test.Try bending the arm on a know good sparkplug about 5-6mm,earth the plug and kick'er in the guts(crank it over)Be very carefull , high voltage danger.If there's still a good spark it's safe to say that there will also be a good spark under pressure in the combustion chamber,speaking of which you should also do a compression test,anything over 100psi should be ok. as i'm not to sure of the extent of the re-build,hopefully the valves were lapped and checked for straight and true and valve seals replaced,if you notice oil on the tip of the spark plug you could have a leaking valve seal or oil seal .Try putting a small amount of fuel directly into the combustion chamber ,tighten up the spark plug ,install the plug cap and.......Yeah ..You guessed it ..."kicker in the guts".If all the abouve are correct and true it should fire up.If it runs for 5-10 seconds then stops you've got some sort of fuel starvation problem , could be dirt in the carb,blocked idle jet ,or air passage or even the needle could have come off it's clip,believe me with an old bike like yours anything could be worn and loose inside that carby.The only other thing to consider is the timing.There may be a good spark but is it happening at the right time inside the engine???. I'll leave it all in your capable hands EGDBCS.Hope this helps to solving your worries. Chow for now......Tilleydog..

Posted on Jun 03, 2009

  • 10865 Answers

SOURCE: need wireing diagram for 1981 yamaha 400 special

get the clymer yamaha motorcycle repair manual for 1981-2002. it will be twenty bucks well spent.

most book stores carry it or you can go to a motorcyle shop or on the internet at clymer.com

Posted on Jun 26, 2009

  • 19 Answers

SOURCE: yamaha big bear 400 will

Sounds like a problem with the starter, could be a starter fuse, relay or solenoid. The start cicuit wiring could also be damaged. If you can pull-start the motor, and it runs fine, you have pretty much eliminated any problems with the motor. Check the wires running from the start button make sure they are intact, also trace them and look for around a 1" cubed black box. This is the relay, when you push the button, if its working, you will feel the box click. Also locate the starter and do the same thing. If you feel or hear the starter click, the solenoid is working. The battery voltage could also be too low to energize the starter motor. Could also be a battery or alternator issue. Check the battery voltage and for any sounds coming from the bike when you push the start button.

Posted on Aug 21, 2009

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Spec vin ecu specs


If it turns, then the battery is OK. Either spark plugs are not firing in proper order (wrong firing order), no power to spark plugs, or no fuel because of fuel restrictions (dirty fuel filter). Inspect the air filter to ascertain its not clogged air. If you smell gas, then you saturated the spark plugs, which is why it refuses to run.
Let it sit for half hour to let spark plugs dry. Inspect to ascertain its not dirty spark plugs, which will also prevent engine from running. After ascertaining its proper firing order, spark plugs are clean, and there's power to distributor cap, ascertain there's fuel in fuel lines by squirting half second (short squirt) of starting fluid into air filter. Close the air filter housing to trap flammable starting fluid gas. Turn engine without giving throttle. Let starting fluid be ignited by spark plugs. If it won't start, then spark plugs are not firing to ignite starting fluid gas. If it starts briefly, but won't run when you give throttle, but catches when a 2nd person squirts more starting fluid into air filter just before engine stalls, then its a fuel restriction issue or no fuel in fuel lines.

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If a starter is able to crank the engine but it won't start you usually have either an electrical or fuel problem. It's also remotely possibly that it's compression.If an engine has proper fuel, spark and compression, it will start when you crank it. So your challange is to find out which part isn't working right. Start with fuel. Spray a little starting fluid into the air intake while someone tries to start the engine. If it starts briefly when you're spraying starting fluid, you probably have a fuel delivery problem. That could be injectors, fuel pump, fuel filter, relay, fuse... who knows what until you check into it.If it doesn't start with starting fluid, check the spark. Pull a plug wire and attach it to a spare sparkplug and set the plug on a solid metal part of the engine. Have a helper crank the engine while you watch the plug. If you have a good spark, it might just be out of timing.In any case, you'll need to start isolating the problem. Find out which part isn't working then you'll know what to replace/repair.

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If a starter is able to crank the engine but it won't start you usually have either an electrical or fuel problem. It's also remotely possibly that it's compression.

If an engine has proper fuel, spark and compression, it will start when you crank it. So your challange is to find out which part isn't working right. Start with fuel. Spray a little starting fluid into the air intake while someone tries to start the engine. If it starts briefly when you're spraying starting fluid, you probably have a fuel delivery problem. That could be injectors, fuel pump, fuel filter, relay, fuse... who knows what until you check into it.

If it doesn't start with starting fluid, check the spark. Pull a plug wire and attach it to a spare sparkplug and set the plug on a solid metal part of the engine. Have a helper crank the engine while you watch the plug. If you have a good spark, it might just be out of timing.

In any case, you'll need to start isolating the problem. Find out which part isn't working then you'll know what to replace/repair.

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Hi there,


Various reasons might be responsible for the problem you are experiencing;




If a starter is able to crank the engine but it won't start you usually have either an electrical or fuel problem. It's also remotely possibly that it's compression.



If an engine has proper fuel, spark and compression, it will start when you crank it. So your challange is to find out which part isn't working right. Start with fuel. Spray a little starting fluid into the air intake while someone tries to start the engine. If it starts briefly when you're spraying starting fluid, you probably have a fuel delivery problem. That could be injectors, fuel pump, fuel filter, relay, fuse... who knows what until you check into it.





If it doesn't start with starting fluid, check the spark. Pull a plug wire and attach it to a spare sparkplug and set the plug on a solid metal part of the engine. Have a helper crank the engine while you watch the plug. If you have a good spark, it might just be out of timing.



In any case, you'll need to start isolating the problem. Find out which part isn't working then you'll know what to replace/repair.




Good luck.

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