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Dubach Racing Development NS-4 Full System SS/AL
Vital Review
The Good

Overall a really great exhaust system. It increases performance where the bike needs it the most, has robust construction, great fitment, is easily rebuildable, improved looks over stock and sheds a little weight while it's at it, all for a minimal price (in the 4-stroke exhaust world).

The Bad

It's cons come from what it's not trying to be; exotic. So don't read that as a bad thing. For just shy of $640, it's hundreds of dollars less than some of the Titanium systems on the market, so expect the difference in price to be reflected in terms of sheer beauty (think Akrapovic) and weight.

Overall Review
Tester: Chris Siebenhaar Bike: 2020 Kawasaki KX250 Mods: Completely Stock Weight: 7 lb - 4 oz Weight Savings: 1lb - 3 oz Whether Dr. D means “Doctor Dubach” to you, or “Dubach Racing Development”, one thing is for certain, the Doctor has a long list of first-hand racing and testing accomplishments that few in the industry can match. All that knowledge has been distilled into Dr. D products, from his ingenious engine relocating kits (mainly for Yamaha’s), to exhaust systems for every current motocross manufacturer. Recently, I was able to test their NS-4 exhaust on a 2020 Kawasaki KX250. While...
Posted by Klinger on 5/22/2020 11:14am