By the looks of it, you've experienced some not-so-pleasant ride experiences. For example, the cart is jerky with over-the-top vibrations. But, friends, this is an easy fix with an affordable solution. All you need is the Spline Bumper for Columbia, Harley-Davidson, EZGO, and Yamaha models with GE motors from Buggies Unlimited. This small but might part plays a crucial role in performance, so once it takes a tank, you will know its time for servicing.As stated above, this golf cart spline bumper fits multiple machine applications. As a matter of fact, you can verify fitment by comparing OEM part numbers with your service manual. For instance, suppose you're sporting a Columbia or Harley. In that case, you'll be replacing OEM part number 11423. On the other hand, if you have a Yamaha, that number is JH7-H1829-00. Finally, for EZGO models, the stock number is JH7-H1829-00.The Yamaha spline bumper attaches to the female motor coupler. Its purpose is to minimize and absorb vibration between the coupler and the input shaft. This EZGO part needs replacing anytime you swap out motors to avoid premature wear and tear. Ensuring the Harley-Davidson spline bumper is in great working order is crucial to the cause. As a result, the coupler and input shaft will have a significantly longer performance life.These are some of those Yamaha parts you want to keep on the shelf. In addition, they are so affordable buying multiple will save you bundles as any orders over 99 dollars will earn you free shipping. Plus, if you are on the struggle bus with installation, our Buggies Garage crew is on standby, ready to troubleshoot right along with you. So, don't settle for a busted caddie. Instead, up-keep so you can keep on by shopping golf cart parts and accessories at Buggies Unlimited.