Need some help YZ450 troubleshooting

Big Jay
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Anaheim, CA, USA
Big Jay
Edited Date/Time 1/26/2012 2:19am
So was out in Ocotillo this past weekend and i have 2004 YZF450. So has i was riding once in 4th gear i could hear my transmission making some noises and it felt like it wanted to hit a false nuetral. It was previously sounding like it was missing alittle only in 4th gear. So any help would be greatly appreciated. Cheers and Happy Holidays.
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motofab36
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Cowden, IL, USA
motofab36 12/2/2009 1:32pm
12/2/2009 1:32pm
Possibly missing teeth on 4th drive or 4th driven gear
Cygnus
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Hanover, CO, USA
Cygnus 12/2/2009 3:13pm
12/2/2009 3:13pm
And a bent shift fork.
RACEGUY
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RACEGUY 12/2/2009 6:14pm
12/2/2009 6:14pm
Fork...probably.

Thrust washer...possibly.

Tear-down...positively.
rallendude
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Adger, AL, USA
rallendude 12/3/2009 7:03am
12/3/2009 7:03am
I've seen YZf trannys that round off the dogs on the gears and bend shift forks jumping out of gear. A partially engaged gear will make the noises you speak of and still pull.

Sounds like you need to tear into the bottom end and closely inspect all the parts associated with 4th gear.

The Shop

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Big Jay
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Anaheim, CA, USA
Big Jay 12/3/2009 6:33pm
12/3/2009 6:33pm
Thanks for the input. I will be having someone tear into the moto soon to see what's going on inside. This bike has never been cracked open yet. I have a lot of hours on this thing from tracks to numerous Desert trips. Thanks again for your suggestions. Cheers and Happy Holidays
kippy450
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kippy450 12/12/2009 10:18pm
12/12/2009 10:18pm
That sucks! Merry Christmas to you....a new trannie!

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