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I need to know what your thought process was that made you go for this, and how you came to using this fluid.
I was looking at using Amsoil's primary chaincase oil, what made you chose the dirtbike fluid over their dedicated chaincase oil?
I was thinking the same thing. I have ordered my 2020 Heritage Classic and it hasn't been built yet. I already have about 5 mods I plan on doing. I just don't know what to do first! This is gonna be a full time job for a while!
Now that's an interesting development indeed.
I need to know what your thought process was that made you go for this, and how you came to using this fluid.
I was looking at using Amsoil's primary chaincase oil, what made you chose the dirtbike fluid over their dedicated chaincase oil?
I am using a Rekluse Torque Drive clutch with 30% reduced spring pressure. This is possible due to the increased number of plates in the clutch. For maximum torque capacity when engaged and minimum viscous drag when the clutch is released, the oil viscosity should not be too high. Some primary oils are too thick in my opinion. They are sold in an attempt to reduce noise in the primary drive from the compensator and the chain/tensioner system.
I looked at several oils intended for the Harley Primary (not engine oils) and the cold/hot viscosity. The Dirt Bike transmission oil is very similar to other V-Twin primary oils that are at the lower end of available viscosities. Some others are much thicker which I avoided. The thinner oils are essentially 80W gear oils as far as viscosity is concerned. I really like the clutch action (no slip or grab) with the dirt bike oil and the primary is quiet and the clutch does not seem to wear at all.
Many people report good results with Automatic Transmission Fluid (ATF) in the primary. It has a typical hot viscosity of 7.5 (maybe a little too low).
Harley tends to recommend a hot (100 C) viscosity of 20 which is based on using 20W50 oil in all three holes (engine, transmission, and primary). In my opinion the engine is fine at 20 (20W50 motor oil), the transmission should be around 27 (75W140 gear oil), and the primary should be around 10 (80W gear oil).
For maximum torque capacity when engaged and minimum viscous drag when the clutch is released, the oil viscosity should not be too high. Some primary oils are too thick in my opinion. They are sold in an attempt to reduce noise in the primary drive from the compensator and the chain/tensioner system.
So lower viscosity in a primary fluid leads to better clutch engagement?
I didn't know that.
Does this account for only your Clutch? Or for essentially all clutch packs that can go in a harley primary?
What effect would this would have on say the SE 10plate clutch pack?
Thanks for the info.
So lower viscosity in a primary fluid leads to better clutch engagement?
I didn't know that.
Does this account for only your Clutch? Or for essentially all clutch packs that can go in a harley primary?
What effect would this would have on say the SE 10plate clutch pack?
Thanks for the info.
Wet clutch plates have to squeeze out the oil in order to grip. Oil that is too thick or with low friction modifiers can cause the clutch to slip. This is true for any wet clutch. Too thick or too much oil can cause the clutch drag when disengaged. That makes neutral hard to find.
Harley recently changed the clutch ramps to separate the plates more when disengaged. Probably due to drag and resulting trouble finding neutral with the clutch cable just a little out of adjustment (see attachment).
I am using a Rekluse Torque Drive clutch with 30% reduced spring pressure. This is possible due to the increased number of plates in the clutch. For maximum torque capacity when engaged and minimum viscous drag when the clutch is released, the oil viscosity should not be too high. Some primary oils are too thick in my opinion. They are sold in an attempt to reduce noise in the primary drive from the compensator and the chain/tensioner system.
I looked at several oils intended for the Harley Primary (not engine oils) and the cold/hot viscosity. The Dirt Bike transmission oil is very similar to other V-Twin primary oils that are at the lower end of available viscosities. Some others are much thicker which I avoided. The thinner oils are essentially 80W gear oils as far as viscosity is concerned. I really like the clutch action (no slip or grab) with the dirt bike oil and the primary is quiet and the clutch does not seem to wear at all.
Many people report good results with Automatic Transmission Fluid (ATF) in the primary. It has a typical hot viscosity of 7.5 (maybe a little too low).
Harley tends to recommend a hot (100 C) viscosity of 20 which is based on using 20W50 oil in all three holes (engine, transmission, and primary). In my opinion the engine is fine at 20 (20W50 motor oil), the transmission should be around 27 (75W140 gear oil), and the primary should be around 10 (80W gear oil).
After I moved the floorboards out 3/4" with Kuryakyn spacers, it felt a little awkward getting my foot on the brake pedal. I added this extended brake pedal pad. It works great with the SoftBrake lever I am using (see earlier post).
After I moved the floorboards out 3/4" with Kuryakyn spacers, it felt a little awkward getting my foot on the brake pedal. I added this extended brake pedal pad. It works great with the SoftBrake lever I am using (see earlier post).
This will be my next mod. I always feel like my feet are slipping off these skinny boards. I'm not sure 3/4" will be enough for me, though. I'm splay-footed, like a five-dollar mule.
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