04' WR450 Starter Issues

I have been dealing with this issue for quite a while now. It appears that my starter is turning too slow, with a fresh charge on the battery it will turn over but seems to run the battery dead after 4 or 5 5-10 second attempts. I have bought a new battery and the same issue exists. I kick the bike and it fires right up no problem, in fact I have basically resorted to just using the kick starter full time now. It appears to me that the starter is just overloading the battery, (I have not cleared a fuse yet). Is it possible that I have a bad bearing in the starter or perhaps the starter got some water or dirt in it at one time. Anyone else experienced the same thing?

Thanks!

The electric start components seem to be sized to save wieght and work fine as long as all systems are working effeciently. Not alot of extra starting power like a car system. If you engine is ok, carb is jetted correctly, and the battery is fully charged, the bike will start right up. I've learned on my 03 that after a long sit in the garage, I have to turn on the gas, crank the throttle a couple of times and wait for a minute or two for the carb to prime. After that it usually starts right up.

Jetting is critical to easy e-start starting down to 32 degrees.

Start with 72 starter jet and 48 pilot jet. I doubt your starter motor is worn out yet. :banghead:

Jetting is critical to easy e-start starting down to 32 degrees.

Start with 72 starter jet and 48 pilot jet. I doubt your starter motor is worn out yet. :banghead:

I am willing to bet his jetting is off, and has since worn his starter out prematurely. My 05 received a new starter after 4 months of use .

Thanks - This is not the first time I have heard jetting. I will give it a try!

72 Starter and 48 pilot, got it!

My problem ended up beieg the brush end bearing ( bush ) in the starter motor.Yamaha don/t sell it as a part but if you unsolder the brushes then remove the bush by screwing a tap or bolt thru it and against the plate it should push it out .Go to a bearing shop and get a new one for a couple of dollars.If they don't have the exact size get someone to make one in a lathe out of a bearing.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now