Rmz 450 2016 Engine Rebuild Manual
2004 Mazda Rx-8 Engine Rebuild Manual
340 hours on my 13 Rmz 450 with FC suspension.Seriosely couldnt be happier with this bike.I bought it new, 340 hrs is no bullshit.works connection hour meter.Had to split the cases and rebuild the tranny at 130 hrs or so.Some seriose false nuetrals did not help the dogs on the gears.Finnally It broke the end off the shift drum.Valves were good.New piston and rings and boom!!! 340 hours.Now i know what yure thinking.Dood just putzzz around on it.But, I dont.I ride decent, Do all the big stuff and can win a Vet B race now and then.Im sure its due for a complete rebuild but damn its been a great bike.The Trick is.5 hrs on oil and clean air filters.Well yu know!!! Its gets put off sometimes.Hahaha.
Wrote: A well maintained 450 ridden by a fast motocross guy will easily go 60 hours on a topend (piston,rings, timing chain). This is as long as you're not doing stupid shit like bouncing off the Rev limiter in the air. For your average joe/trail rider I would push it to 80-100 hours. The key is frequent oil changes and a clean air filter. Agreed, I have a (slow) buddy with 150 hours on a 2010 yz450f. Hasn't touched the top end yet. I wouldn't suggest this obviously.
But freakin 15 hours? Believe it or not, The kx 450 top end is damn bulletproof. The 12-13 were the worst years for the Piston itself. They were different but still failed on occasions. I myself have put over 300+ hours on multiple Kx 450s. And from personal Experience being a 'Pro' or a 'A' rider on moto only, i run stock OEM Kawasaki pistons for about 40-45 hours.
Can you stretch to 55-60? Is it worth it? If your on a budget or trail riding then yeah i mean you can. But Change your oil every 2 rides with a oil filter every other change. I only use the best Twin Air filters with Bel-Ray filter oil!