Please select make, model and yearCrankshaft Assemblies
If you have a seized engine, or are looking to overhaul or rebuild your engine, don’t forget to replace your crankshaft. Crankshafts rarely break, but considering that they are such a major component of your bottom end, they can cause a lot of damage if they do. At Rocky Mountain ATV/MC, we carry durable, quality crankshafts to get your engine running strong again in no time.
We carry full crankshaft assembly kits and connecting rod kits that are built to OEM specifications and designed to meet or exceed OEM performance. Our kits from Hot Rods and Pro-X are designed to last the lifetime of your ATV when properly cared for.
If you would like a stock crankshaft instead, be sure to check out the OEM section of our website to get the original manufactured crankshaft and any additional accessories that you may need. Check out our selection of crankshaft and connecting rod kits for your ATV today!
Steven in TX
I now have 110 hours on this crank in a crf450. Has performed perfectly. Just put a 3rd piston in & still no play in the lower end. Its as tight as it was when installed. No reason to think it wont go another 100 hrs. Im sure it will. I do change my oil about every 8-10 hours of run time & use motul 300v oil. Very happy with this part. Ive purchased one for my ktm 300. Also used hot rods bearings & seal with the crank.Read All Reviews
Dana in MA
Don’t wait for it to let go. Tick tock tick tock. $$$$$$$$$$$Read All Reviews