When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Dyna Glide ModelsSuper Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
I was told to fill my primary with the bike standing straight up to the bottom of the clutch spring, is this correct and which outer diameter, shown by red arrows, is considered the bottom of the clutch spring in this photo, the inner or outer diameter? (fluid level measured from the very bottom of course) Any additional advice would be appreciated..thx!
Last edited by ericj205; Mar 10, 2026 at 09:40 AM.
You want to go by the lower arrow. I would recommend you get a factory service manual. That way you don't have to wonder about what someone tells you but you can always come here for advice.
Anyway, it looks like you have it filled to the right level.
Thx to all who replied and the pics too. I have a service manual and it says 32 oz (1 qt) for fluid change and I swear both times I have changed fluid I measured 32 ounces and it always fills to nearly overflowing out with bike upright. I have always had a problem with oil leakage at the seal between inner primary and trans. That is when I questioned the manual and asked how high the oil level should be and if that is causing the leak. Last night I removed the oil level to correspond with the pics and rode it again. No oil drops on the floor after parking and sitting overnight. Its possible I made a mistake but twice would be odd. Maybe low rider primary takes less than 32 oz IDK but I will ride it like this a season and drain and measure exactly how much I put in the next change to verify.
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom
Slideshow: Killer Custom's latest build relies on styling changes rather than performance upgrades, giving the cruiser an entirely different personality.
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Primary fluid level in 2007 Dyna Low Rider
