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High mileage has always been and forever be the true cause of clutch slip... The highly refined and 100% pure synthetic was never the cause of clutch slip... When the manufacture recommends Semi Synthetics which is a possible 50 50 mix of Synthetic's uniform molecules and Mineral's varying...

Simple search on Ebay revealed not only the Yamaha brand but also the correct 75w85 final drive oil to choose from...

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Because the viscosity of gearbox and engine oils are measured on different scales, an 75W85 gear oil viscosity range is about the same viscosity as a 30 grade motor oil... SAE 80 gear oil is roughly equivalent to an SAE 20 grade engine oil... SAE 85 gear oil is roughly equivalent to SAE 30...

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Mercy Bonz... Under difficulty shifting I do acknowledge "poor quality oil..."

Mercy Zee... it's true that thicker oil means more film thickness but thicker also means MORE friction not less... Quote VP Fuels Is a thick motor oil better if you live in a warm climate? You might think a thicker oil (high viscosity) would offer better protection. Well, yes, and no. Viscosity...

Viscosity Trends by Ryan Stark Blackstone Labs April of 2017 will mark my 20th year here at Blackstone and in that time a lot of changes have taken place. I’m a big fan of change myself. Long ago I got some advice from my Uncle Dan who said, “The only thing that’s constant in life is change.” I...

Ducati V4...

Motorcycle shift quality refers to how smooth, precise, and responsive your motorcycle's gearbox operates when changing gears A good shift feels effortless and predictable, while poor shifting can manifest as rough engagement, missed gears, or difficulty in changing gears altogether. Rough...

I agree... if there is one thing a rider has control over is the degree of information...

My FZ8 customer Dillion poor shifting was clutch drag... he reports smooth as butter shifts on Mobil 1 5W30 API SN at 4K miles... Here are the steps how to check and eliminate unwanted clutch drag... 1 Place your bike on the center stand... 2 Start engine and establish a steady idle at 212ºF...

True... oil shear is real and is measured per ASTM D-445 but accordingly to the engineers oil shear measured by your uncalibrated foot is by guess and by golly... pick 50 riders to judge oil shear on your bike and maybe get 50 odd feelings... give 50 riders the standard ASTM D-445 and you should...

All reeeeet... It's like I have a V4 brother... SP stands for Sport Production... your Ducati was designed with this tire in mind... Have you visited the factory in Italy??? Ducati Apollo V4 1964... 2004 Ducati MotoGp V4...

Engineers say that oil shear as related to shift quality is pure mechanical hypochondria... A rider's foot is not a reliable method for oil shear testing... ASTM D-445 is the standard that objectively measures the rate of oil shear... A rider is a wild and variable component on a motorcycle...

That thing is a rare and exotic homolgated racer and the best tire to run is the Pirelli Supercorsa SP... expensive but you can't ask for more at Go-straight-to-Jail-Speeds...

Busy Little Shop's 3 step method of bike cleaning without a garden hose... 1) At the end of the day soak a wash cloth in very HOT water and remove bugs and road grime... repeat as necessary... 2) Add plastic polish to fairings and gas tank and buff to a shine... 3) Add a little Gasoline to...

Helmet manufactures take into account that the human body sweats water vapor as a primary mechanism for regulating body temperature. When the body heats up, sweat glands release a watery fluid (sweat) onto the skin. This sweat then evaporates, taking heat away from the body and cooling it down...

Are you looking for that new helmet smell??? I dunk my skid lid in a bucket of warm water and mild laundry detergent soap... I hand agitate the liner until all the sweat and oils are removed... I fill and rise the inside of the helmet with warm water to remove all the soap... I towel the...