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Ninja 500 motor in Ninja 400?

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4.5K views 11 replies 6 participants last post by  Deddie  
#1 ·
I have the opportunity to pick up a crashed 2024 Ninja 500 for about $2K. What I'm wondering is if I can take the motor out of the 2024 500 and put it into my 2018 Ninja 400 track bike (I just do track days for fun, not racing).
I have to pull the motor on my Ninja400 anyway to have the transmission undercut, but I figure if I can use the mods I already have on the 400 (velocity stacks, full Hindle exhaust, high flow air filter, K tech suspension, rearsets etc) and get the 500 motor into my 400 frame I'll be golden!
Anyone tried it? I figure I might have to swap over the motor and wiring harness.
Thoughts?
Concerns?
Thanks!
 
Discussion starter · #5 ·
I posted this question as a “worst case scenario”. I haven’t seen the bike to know if the frame is straight or not, but I know it runs good.
I know the forks swap over, does the rear shock swap over? If the frame is straight I may just put my go fast stuff on the 2024 500 frame.
 
Discussion starter · #11 ·
kpier883 said:
As an alternative to having machine work done to mount the GSXR shock, another thread indicates that one can purchase the lower mount pivot from a 400 and use it on the 500. I haven't tried it yet, but should know later this week.

Like this: View attachment 34545
Click to expand...
so I could swap my N400 link onto the N500 since I’d have both bikes in my garage. Hmm
 
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