2025 KX250 shifting issues

Who has a 2025 onwards KX250 or 450 for that matter?

Shifting gears on this thing is a little difficult at times and wondering if anyone has a fix for this ? 

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FGR01
Posts
5989
Joined
10/1/2006
Location
AZ US
Fantasy
3/17/2026 6:50pm

What oil are you running ?

 

1
crmx105
Posts
615
Joined
5/7/2016
Location
Dunnellon, FL US
3/19/2026 3:48pm

Move shift lever up or a longer lever might help?

Steve Austin
Posts
155
Joined
4/21/2023
Location
Hell Yeah, CA US
3/22/2026 5:15pm Edited Date/Time 3/22/2026 5:16pm

Rotella?

So I got my 2026 KX 250 delivered last night at 9 PM. Went over real quick to check the Dealer prep was OK re-oiled the filter and went and broke it in today.

Fucking worst shifting piece of crap I’ve ever ridden in my life! Absolutely will not shift under full power at all. 
 

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The Shop

jameslowry
Posts
127
Joined
8/9/2023
Location
pearl, MS US
3/25/2026 4:48pm

Rotella?

et rid of the diesel oil & put REAL motorcycle oil in it Semi Synthetic 20w50 will make it shift(Golden Spectro 20w50 semi syn)

Steve Austin
Posts
155
Joined
4/21/2023
Location
Hell Yeah, CA US
3/25/2026 6:52pm

Rotella?

jameslowry wrote:

et rid of the diesel oil & put REAL motorcycle oil in it Semi Synthetic 20w50 will make it shift(Golden Spectro 20w50 semi syn)

The Rotella was just a joke... I assume it came with the Kawasaki racing semi-syn 10w-40 that the manual recommends. I usually use Castrol MA2-rated motorcycle oil in my past thumpers with no issues. 

I spoke to a Team Green off-road pro who said some of his have been pretty bad when new, but smoothed out after a few hours of break-in. I'm keeping my fingers crossed.

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