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!
Stephen in TX
2003 KX250 rebuild I bought this rebuild kit because I had an interior seal seaping into the combustion chamber and you have to split the case to change it. This caused a very low end bog off throttle. PROS- it works fantastic so far. I am about 12 hours into it. It’s cheap! Make sure you know what your doing though. CONS- As other reviews have said two gaskets did not fit correctly and were unusable. This is subpar quality compared to OEM. Gaskets are paper and crank uses plastic where aluminum there before. I believe this has been stated by previous reviews. There were two gasketsRead All Reviews