Show #466 - The Fastest KX450 I Have Ridden w/Jamie Ellis

Rocky Mountain ATV/MC Keefer Tested

Kris Keefer

Rocky Mountain, Professional, Pulpmx, Racerx, Sports %26 Recreation, Motocross, Supercross, Keefer

4.9 • 644 Ratings

🗓️ 2 February 2026

⏱️ 93 minutes

🔗️ Recording | iTunes | RSS

🧾️ Download transcript

Summary

Jamie Ellis from Twisted Development comes on to chat with Keefer about his latest KX450 build. Learn about what was done to the engine to make it one of the fastest Kawasaki builds to date and what you can do to your KX450 without breaking he bank. Get helpful tips as well as some insight on the strengths and weaknesses of the KX450 powerplant from one of the best engine builders this industry has.

Transcript

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0:00.0	ApopamX Network production.
0:11.0	This is the Rocky Mountain ATTV MC Kiefer tested podcast.
0:15.9	The podcast you come to for the straight insight on all things motocentric.
0:20.9	Hard parts, bikes, gear, suspension, motor mods, and more.
0:25.6	It's Kiefer tested.
0:27.4	Here he is, Chris Kiefer.
0:40.0	How's it going, everybody? Welcome in.
0:47.2	This is the Rocky Mountain ATVMC.com Kiefer tested podcast presented by FXR Racing and REP suspension.
0:48.6	Thanks for joining me here today.
0:49.5	We got a new show.
0:50.2	It's exciting.
0:52.1	We got a guest caller.
0:53.5	I'll just say it.
0:55.6	We got Jamie Ellis from Twisted Development. We build. We got a guest caller. I'll just say it. We got Jamie Ellis from Twisted Development.
1:05.0	We build. We built a, I shouldn't say we. I didn't do shit. He built a 2026 KX450 with his own money, his own R&D time, all of it.
1:11.2	He just wanted to see what he could build for the sake of just doing it, honestly.
1:18.6	And with all the stuff going on with Prado last year,
1:21.2	he wanted to see if he can build an engine that is fast and rideable.
1:25.2	And I had a chance to ride that thing last week so we decided to get
1:30.0	him on here to talk about that build what you guys could do to your KX-450s out there I've
1:35.1	been riding ours quite a bit here lately so it's basically an all-encompassing KX-450
1:42.5	shows so pretty interesting stuff here.
	...

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