5th gear won’t engage

Edited Date/Time 6/16/2023 2:29am

Hi I have a Yamaha WR 450 2003 model. It changes gears from 1st to 4th no problems and then fifth gear there’s nothing it just goes into neutral when I put bike up and engine is off the fifth gear will engage then but won’t when  running wondering what’s going on here?

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5 gear

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Toccosauce
Posts
235
Joined
3/20/2023
Location
Snohomish, WA US
6/15/2023 4:26pm

You could either 

 

A: tear it down 

 

B: just call it a loss and grab a more modern bike if able. 

1
AngryBear
Posts
766
Joined
4/1/2008
Location
Asheville, NC US
6/15/2023 4:56pm

going to need to split cases.  could be one of many things, gear/circlip/shifting fork failure.

things i would not do:  ride as is.  depending on what failed, it could fail further and cause you a crash if things lock up at speed.

6/15/2023 5:19pm

Thanks for that angry bear thought I did it would be something pretty major and yes probably a good idea not to ride it anyway looks like I got a lot of work thanks fellas

Gravel
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1309
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2/22/2014
Location
Ridgecrest, CA US
6/15/2023 6:31pm Edited Date/Time 6/15/2023 6:32pm

Tear it down. Bent shift fork, bad gear dog, etc..

The Shop

SEEMEFIRST
Posts
11531
Joined
8/21/2006
Location
Arlington, TX US
6/15/2023 6:42pm Edited Date/Time 6/15/2023 6:45pm

I have a Bud Light that says it's a fork issue. 

Yeah you're in for a deep dive. 

Has anyone ever been in the transmission?

I acquired a KX 500 that wouldn't shift correctly, and it turns out that 2 of the forks are ALMOST identical, but are not.

wwdiii
Posts
1916
Joined
4/15/2019
Location
League City, TX US
6/15/2023 8:54pm
SEEMEFIRST wrote:
I have a Bud Light that says it's a fork issue.  Yeah you're in for a deep dive.  Has anyone ever been in the transmission? I...

I have a Bud Light that says it's a fork issue. 

Yeah you're in for a deep dive. 

Has anyone ever been in the transmission?

I acquired a KX 500 that wouldn't shift correctly, and it turns out that 2 of the forks are ALMOST identical, but are not.

One of the few people in Texas still drinking Bud Lite!!!

spimx
Posts
1171
Joined
3/25/2019
Location
Port Isabel, TX US
6/15/2023 9:15pm

Call in sick get some bud light and open that case! 

Boomslang
Posts
7656
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12/22/2018
Location
Cape Town ZA
Fantasy
1558th
6/15/2023 11:09pm
SEEMEFIRST wrote:
I have a Bud Light that says it's a fork issue.  Yeah you're in for a deep dive.  Has anyone ever been in the transmission? I...

I have a Bud Light that says it's a fork issue. 

Yeah you're in for a deep dive. 

Has anyone ever been in the transmission?

I acquired a KX 500 that wouldn't shift correctly, and it turns out that 2 of the forks are ALMOST identical, but are not.

wwdiii wrote:

One of the few people in Texas still drinking Bud Lite!!!

He ain't drinking them, he trying to offload them. 

To the OP and as mentioned in many of the posts above, you going to have to tear the motor apart to find the offending part. The bike is old so inspect all the other gears and associated bits n bobs while its open. If you plan on keeping the bike then spend some of your hard earned cash at rebuilding the motor back to Zero hours.

 

Goodluck...and yup, I'm South African and will gladly except all unwanted Buds...DM me for shipping address. 

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