Please select make, model and yearEngine Valves and Shim Kits
When you hit the throttle of your dirt bike, there may be any number of things going through your head. If you’re racing on a motocross track, you might be anticipating the next series of whoops. If you’re on an enduro trail, you might be watching out for fallen trees. You’re probably not thinking about your engine valves, but that doesn’t reduce their importance. Your intake and exhaust valves are continually in motion, ensuring that your engine is operating at its peak performance. If they aren’t… well, fallen trees and whoops are going to be the last things on your mind.
When it’s time to replace your dirt bike valves, Rocky Mountain ATV/MC is your one-stop shop. We carry an extensive assortment of motorcycle engine valves: intake and exhaust valves, titanium and steel valves, and more. We stock leading brands like Pro X, Faction MX and Hot Cams. And with our Parts Finder, identifying the valves you need is easy. Need CRF250R valves? How about for a YZ250F? No problem! Just enter your bike’s make, model and year. We’ll do the rest to show you what fits.
Aside from valves, we also have important accessories like spring kits or shim kits. We even stock individual shims measured down to half sizes! And with the best prices, there’s nothing better than Rocky Mountain ATV/MC!
Doug in WA
Well, my dealer's mechanic said these valves don't really go out of spec like the old tappets do. And he was right, so I have a full box haven't used one yet, but I didn't want any down time so ordered the kit ahead of time. The RMATV video on adjusting KTM valves is really good and is what made me decide this was definitely within my wrenching comfort zone. One trick, if you can't get a reading off of your current shims because you are using calipers that are too hard to get a good reading, you can use one of the hot cams shims with a known spec into your calipers, then use your old shim and a feeler gauge and you can subtract and get the spec of the current shim. As one reviewer noted, you really need a micrometer to measure the shims.Read All Reviews
BARY in UT
After having valve issues on a recent trip to Baja I came home and promptly purchased and installed this valve kit. It all went together well and the new valves sealed perfectly in the valve seats. Before installing the kit my bike pulled strong well into the rpm range that I wasn't comfortable taking it to. after installing the kit I can't get it to rev anywhere near that range. It does fine below about 7 rpm but above that it sputters. I think the valves may be floating either due to bad springs or the wrong springs, possibly intended for the titanium valves but I don't know and I have not been able to get Faction MX to answer the phone, respond to an e-mail or return a call and I have tried many times. I would definitely not recommend this valve kit.Read All Reviews
Derek in CO
The exhaust on this kit is perfect. Increase exhaust flow and sounds throatier, its not annoying loud. If anything this is the upgrade to get. I am excited to see how the cams are going to do once installed. Amazing how much power this kit increases the RzR. I love it!Read All Reviews