Whenever a bike won't start, check for the three basic needs of any internal combustion engine
1. Spark
2.Compression
3.Fuel delivery

To check for spark, simply pull out your spark plug, leave it in the boot and hold it against the cylinder while cranking it ive. You should see a nice blue spark. Sometimes you won't be able to see it though, and I end up being dumg and hold onto the plug and kick over the bike and shock the crap outta myself, but it doesn't hurt that bad. I PROMISE(although I've never done it on an electric start bike[img]i/expressions/face-icon-small-wink.gif[/img] )
To check for compression, pull the plug, put your finger over the hole(hehe) I mean spark plug hole you perverts[img]i/expressions/face-icon-small-wink.gif[/img] and crank it over. Your finger should be sucked in and blown out of the spark plug hole.
To check for fuel delivery, remove spark plug(preferably use an old one since you're probably going to foul it) and dry it. I usually take a lighter to it to burn off any excess fuel. Next I reinstall the plug, hold the throttle WO and crank it over. Now pull the plug and see if it's wet. I always do these three things when my bike won't start. You can narrow down the problem alot faster this way. Now, if you have spark, compression, and fuel, either your plug is fouled or jetting is off. Good luck, hope ya get 'er going again!

 

and if all that fails.
check your coil.
my dirt bike did that and i put a new plug and i heated it up and it started and would run fine when it was hot but cold it was very hard to start.
i put in a new coil and it works perfect now.
just a thought.

 

Ahha!, I found the problem all she needed was a new plug, thanks all who told me to get a new plug! time to ride!!!, sandblaster have you checked your plug?

 

same here it was the damn plug but its all good now thanks for all the advice it helped out alot

 

NEVER EVER USE EATHER ( STARTING FLUID ) ON A FOUR WHEELER !!!

I have repaired more bent rods, cranks, screwed up pistons, valves, head gaskets, head studs and bolts because of that stuff.

Eather is for diesels, I don't care how or who has told you to use it on a gas engine !!

Use carberator cleaner if anything

Using Eather on a ATV is more REDNECK tham anything Foxworthy can imagine coming up with.

Sorry, Eather is a sore subject with me.

----- Gimpster -----

 

i've used it hundreds of times with no problems (not on my 400ex but older machines). Can you provide a technical explination of what exactly it does that is so bad?

 

Sarting fluid has a very high flash point. Diesls fire off compression and it will help them ignite the fuel. But consider the cam lobe timing and valve opening is way different than a gas engine.
When you spray it into a gas engine, sure it will fire, but the next time the piston comes up, it will pre ignite the air fuel mixture way too soon because the chamber is still warm from the first time it fired. The added high flash point fuel ( eather ) added to the normal air fuel mixture of the carb can be too much, and causes a heck of a powerful blast. And still the piston is traveling upward increasing the pressure in the combustion chamber even more, before any valves are open, something has to give.
A minor example would to loosen the distributor on a car and advance the timing a lot, then try crank it over with the starter. The starter will suddenly stop, because of the pressure inside the cylinder from the ignition firing too soon, with the piston traveling up in the bore. The pre ignited gas is expanding and the piston is trying to compress it yet. Eather multiplies this effect dramatically
The situation is evevated when a high flash piont fuel is added, making the exploding force even worse.
Some situations will cause the engine to spin backwards with such force that if the cam chain is loose or the adjuster is not tight, a valve wil be open yet and the piston will hit it.
I have seen simple situations where so much eather was used on a Honda lawn mower, that the crancase was filled with an eather air mixture and the blow by of the engine firing blew out the crank seals and split the case.
Ever seen a little eather sprayed in a tire and ignited to seat beads ? doesn't take much to blow the tire over the bead. (not advised eather)

Sorry about the sermon, just the facts.

----- Gimp -----

 

good info

 

lol u lost me at starting fluid... [img]i/expressions/face-icon-small-blush.gif[/img]

 

In lehmans terms, don't do it. The easiest example that I can think of is;

Take one magnet and imagine it's the piston, now take another magnet and imagine it is the ignited eather in the combustion chamber. Push two of the same ends of the magnet(I.E. S&S or N&N) together. They push back, right? When you do that in an enclosed cylinder, something has got to give, which you don't want? Get it now?

Gimpster, thanks. That was very useful information!