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Old 11-17-2014, 09:11 PM
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Default 2007 yz450 5 gear problems

     

I have a 2007 yz 450 that has been dropped a few times on the shifter. In fifth gear it felt like the power was surging moving the bike back and forth not going any faster. After reading some threads online I figured it might be a worn shift fork or worn gear. I have taken the motor apart and have looked at the shift forks and gears and cant find anything wrong with it ?
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Old 11-17-2014, 10:17 PM
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Clutch slipping? Type of oil used?

---------- Post added at 03:47 PM ---------- Previous post was at 03:38 PM ----------

Shift mechanism issue generally lead to false neutral and actual shift issues ( hard shifting etc ) time to check your clutch.
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Old 11-18-2014, 10:20 AM
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So its just the clutch? The bike runs like normal in the first 4 gears.
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Old 11-18-2014, 11:35 AM
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The higher the gear the higher the stress on the clutch. It could be worn friction disk, weak springs, work metal plates or using an incorrect oil causing the clutch to slip.
What oil are you using?
How old is the clutch?

Paw Paw
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Old 11-18-2014, 12:50 PM
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Quote:
Originally Posted by tundrabeagle3 View Post
In fifth gear it felt like the power was surging moving the bike back and forth not going any faster.
Um... I hate to be "that guy" but were you hitting the rev limiter?
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Old 11-18-2014, 09:37 PM
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Its dont think its the rev limiter because it starts having issues with 5th as soon as I click in and give it a little gas. I bought the bike used and have never changed the clutch. I looked at the plates and they aren't blued and look like the oem. The shift forks have some scratches but may have came from when I took the clutch basket off. The gears look good not missing any teeth. Would like to make sure it just the clutch while I have it apart. I would hate to take it apart again especially since its going take me a while to put it all back together. Thanks guys
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Old 11-19-2014, 08:50 PM
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So is just the clutch? I use Valvoline 4t motorcycle oil
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Old 11-20-2014, 04:44 AM
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I did not know that Valvoline made a motorcycle oil. Check the oil rating seal and make sure the bottom of it is blank. If it is not, then change to a different oil.

Paw Paw
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