Which of these is the correct throttle stop?

Hoping one of you can advise me; I have 2 numbers that I've come up in my searches for the YZ450F throttle stop to swap into my 04 WR450.

5NL-14591-00-00

and

5JG-14591-00

My local dealer tells me that the first is only for 250's, and the second works on ALL 450's. Can anyone confirm this?

I have the second one for my 450...SC

Thanks for the reply Steve! Anyone else have any experience w/ either one?

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