casique, I don't have the tranny noise either, got 4k + miles on the Ultra. I think the only ones who have it (tranny whine/noise) limp wrist the throttle, thus causing the bike to whine as it wants to be rode like it was meant to be. LMAO...

 

neither---- i like my wife, not a tranny

 

I dont get it. How the hell is this IDS Going to make the straight cut gears stop wining.
Doesn't make any sense to me. I must be missing something here.
[sm=boink3.gif]

 

Damn I'm sick of hearing that. It's just not true.

 

FLHDRIVER, since you ended your post with "LMAO" I guess that means you were being funny. So I'll give you the benefit of the doubt.

Otherwise, I would think you're an idiot. LMAO

 

From what I am reading, your thinking the Isolated Drive System is the key to why the 08's don't have any tranny noise? How is this? Can someone explain to me on your reasoning to why you think this is the trick?


Bob

 

its probably helping the clattering that some report, not the whine

 

Yeah, was meant to be funny. Glad someone else has a sense of humor here.

 

The whine has never bothered me. It sounds exactly like a good set of straight-cut gears should. I can get clatter from them when I try to run at 40 and below, but that's about like saying my elbow hurts when I try to bend it backwards.

 

My best guess is isolation drive at the rear sprocket dampens harmonics produced either at the compensator sprocket or in the transmission gear or or crank shaft or primary chain tensioners. Each component is interconnected and can broadcast noise throughout the drive train.

Kind of like tuning a guitar. If I dampen oscillations at some operating frequency, I am filtering out unwanted noise (clattering). For example, if I am operating the bike at 1800 to 2000 revolution per minute while in 5th gear, my RG clatters like a bastages. I desire to dampen or "isolate" the clattering in this rpm range. I tune or filter the frequency response / noise of the drive train from rear sprocket. This is the cheapest way to do it. I would not have to change the transmission gears nor compensating sprocket in the primary nor worry about the crank shaft dancing about its main bearing.

Look at the isolating compensation sprocket as a means to lessen the vibration from the rest of the drivetrain. I guess the rubber in the sprocket absorbs or dissipates the harmonic vibration at a ranges of drivetrain operating frequencies.

I am just an electrical engineer. A mechanical engineer can explain it more accurately than I can.

Tuck