...Ok...fair enough (but it is still a gear mesh, which you have previously stated needed lubricant with special qualities), but how about the aircraft engines with gear reduction for props? That is essentially a one-speed transmission built into a 300+ horsepower 4 cylinder air cooled pancake engines that are specifically designed to deliver torque...are you saying that these are poor designs even though they have been around almost as long as Harleys?

And then there are the sports bikes previously mentioned with performance demands way exceeding your typical HD...and they do just fine with engine oil...

I do not doubt that you are highly knowledgeable in what lubricant your transmissions require for optimum and reliable performance, but can you equally state that all Harley Davidson transmissions need special lubricants with the same certainty?

 

Way more torque then a Harley? What is a 650 like 40 pounds of torque at the rear wheel on a bike that is half the weight and have less then 1 degree shift dogs. How long these said bikes last? I see them in the junkyard all the time. I don't know that I have ever seen a Harley in a junkyard.I once again can not speak for Harley but our gears are 8620 steel, hobbed before heat treat. The shift forks are 4140 hard chrome plated. We do this because we want this to be the best transmission available so why on earth would we tell you to use anything but the best lube available.

 

The gear mesh you are speaking of with oil pumps and aircraft are what we like to call flintstone gears. The gear teeth are large, fat teeth that do not mesh with a tight tolerance similar to what Harley used up until 94 before they went to the high contact gears. High contact gears are more precision ground, tight fitting gears similar to sport bikes but with 4 degree undercut on the dog teeth to handle the low end torque required to move such a heavy bike.

 

Absolutely not! You're confusing engine torque with rear-wheel torque.
A performance 650 engine will spin about twice as fast as a Harley engine. That means that to spin the rear wheel at the same speed, it can go through double the gear reduction, doubling the torque. So the bottom line is that this 650 will produce about the same rear-wheel torque as a stock 1600 cc Harley engine. In a much lighter bike. That's why they're faster. I wouldn't think this should need to be explained to a gearbox man.

However, my friend was running a 1000 cc class, turbocharged, and running up to 30 pounds boost. This would have put crankshaft torque at at least 160 lb-ft (way more than even most highly hotrodded Harley engines), and rear-wheel torque at about 4 times what a stock Harley can generate. Fed through a transmission lubricated with engine oil.

But when you combine torque and rpm like this, you get a measurement called horsepower. That's why horsepower is what's used as an indication of power, rather than torque. Torque alone tells you almost nothing about how fast an engine will move a vehicle. A thousand lb/ft of torque at zero rpm is zero horsepower.

Really? Really??? You don't already know that Japanese bikes are some of the most long-lasting and reliable around???
I might be a Harley guy, but at least I don't need to deceive myself (or try to deceive anyone else) to do it.

 

Torque is the reason transmissions fail not horse power. I'm done, I hope somebody learned something because this guy doesn't want to. One question for you before I go. How much is Exxon( or whatever oil company is making Syn 3 this week) paying you.

 

this is getting ugly.....

 

Somewhat true, and as I mentioned, this 1000 cc engine was making about twice the crankshaft torque of a Harley.

Nothing. Nor have I ever purchased or used Syn 3.
Nor do I sell any brand of lubricant. Don't you though?

 

Like countless megalomaniacs throughout history, I prefer to use sweat from my minions. It's just a shame that it takes so long to get enough for all 3 holes, especially only collecting it from the females.

 

This is strangely funny.

 

You do know that Harley Synthetic Oil is not a pure synthetic but a Blend of conventional and synthetic (like Quaker State Blended oils)


Engine oil in the V-Rods is also shared with the transmission with no real failures even with "built" high HP and TQ engines. I am running 154HP and 108 ft/lbs TQ and never had hint trans problems with over 38k miles