Well, one big reason is that changing the transmission oil helps keep your ride running smoother for longer. What Is the Importance of Changing Harley-Davidson Transmission Oil? Most synthetic oils have a higher viscosity than conventional motor oils and are designed to hold up better under heat and pressure. The most prevalent oils used are SAE 20W50 for motorcycles with pre-2006 engines. If you want to keep your bike running smoothly and efficiently, it’s essential to use the proper oil amount & type when changing the transmission oil in your Harley-Davidson. The oil capacity for all Harley-Davidson models is approximately 24 fluid ounces or. “What is the Harley transmission oil capacity”? Now that you know the importance of changing Harley-Davidson transmission oil, let’s look at what that entails. Read Also: Best Primary Oil For Harley What Is the Transmission Oil Capacity of Harley-Davidson? This type of oil is formulated with a higher viscosity index than standard engine oils and contains additives designed to enhance performance, reduce wear and extend engine life. SAE 60 H-D is also recommended for high temperatures above 80 degrees F. But if your region is below 40F, you should get something that meets the SAE 10W40 standard. It is recommended that Harley Davidson should be serviced with a synthetic oil that meets the SAE 20W50 standard. The oil should meet the requirements of the American Petroleum Institute (API) Service Classification SG/CD or higher. Harley-Davidson recommends heavy-duty, synthetic engine oil for all of its models. But which is the right Harley Davidson transmission oil type? When it comes to Harley-Davidson bikes, choosing the right oil is essential to keeping your bike functioning optimally. Which Oil Type Is Suitable for Harley-Davidson? It’s an essential part of keeping your Harley in top shape and ensuring that you get the utmost performance from it. That’s where the Harley transmission oil change comes in. While they’re known for their style and performance, they also require regular maintenance to keep them running smoothly. Harley-Davidsons have been the go-to choice for many motorcyclists all around the world. It is known for its large, powerful engines and classic American cruiser styling. Harley-Davidson is one of the most recognizable and iconic American motorcycle brands, boasting a long and storied history from 1903. How to Change Harley Transmission Oil: Step by Step Guideline.How Often Should You Change Harley Transmission Oil?.What Is the Importance of Changing Harley-Davidson Transmission Oil?.What Is the Transmission Oil Capacity of Harley-Davidson?.Which Oil Type Is Suitable for Harley-Davidson?.UPDATE EDIT: I did a search and found all you need to know, all written by Ray.I just learned from him using his knowledge and his part, using my local Harley workshop to hone/size, and taking my own gearbox apart to fit it. But his spacer really does work when an expert, not a hack like me, is on the job! I put Ray's spacer on one, and it was instantly much better but I did a shit job fixing the bushing into the case myself a few years back and so as the weep has returned to where it once was I need to redo with new bushing. I bought one from him when I lived in England.īut as he says, his spacer ONLY works when your mainshaft-bushing fit is perfect i.e. He got famous in the Shovelhead world in the early 2000s when he started selling these from home. The aftermarket has copied him now, but he still sells them on eBay. That works.īut it's most likely going to weep/leak through the bushing and down past the main big oil seal.Įngineer genius Ray from the Canadian maritime provinces very famously sells the leak solution, a spacer with built-in o-ring to seal the shaft before an oil can possibly reach any further. if it is through the small oil seal at the end of the main drive gear, you can use TWO of the superior EVO oil seals instead of one of the Shovel ones. In general, it's good to remove primaries and sprocket (or pulley, on yours), top up the gearbox and see where the leak appears to be. Dissassemble gearbox and go to a Harley engineering shop with shop manual, shaft and new bushing (these are usually not sized exactly to fit and fix) for a repair to spec. You will be very lucky to ever stop a leak if this is the case. If, with pulley (yes, that is one of the first final-belt-drive Big Twins) off and no stress on the gearbox mainshaft, you can wiggle that mainshaft more than a smidge, then that points to worn bushing. this is the hardest to see, possibly the most common reason. **worn main drive gear bushing for mainshaft. **smaller main drive gear oil seal likewise **large main oil seal damaged or out of place The leaks are caused by one of more of these: Sorry, but the Super Nut is just a plaster over the problem. Re: BORING!! 4 Speed Shovelhead Transmision oil leak
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