I've been doing research for several days and can't seem to find my answer. I'm a cheap bastard trying to find a good deal on a used rear rotor for my '02 Dyna part number 41797-00. I see some off of ebay showing current thickness vs the minimum (.205), but I wonder what the maximum thickness is when new. Anyone know? I'm trying to find out if it's worth it to spend about $40 for a used rotor with a decent thickness photographed with a digital caliper reading, or go for a new one which is three times the price. OR, I could just buy a Chinese knock off, which would have the same specs and it will meet my expenses/ expectations in the middle. Now, I would rather stick with a new HD rotor, but their mark ups are ridiculous. SO, before anyone will ask if I care about my life when buying a Chinese rotor, I'm going to say NO so repeated threads don't show up asking me this dumb question about a piece of steel. If I could afford a 2017 motorcycle, I wouldn't need to be searching used rotors for a fifteen year old motorcycle. Thanks.

 

Considering the cheesy meterlurgy of the Chinese,good Luck on it not warping.

 

I suspect you already know the correct answer to your question.

 

A new, legit #41797-00 rotor is $110 brand new: http://www.boardtrackerharleyonline....-rear-41797-00

The words, 'cheap' and 'brakes' should never be used in the same sentence; I don't care how fast it can go, I care about how fast I can stop it

 

Why don't you measure the thickness of your rotor at a point where the pad has not rubbed against it, wearing it out? Like at the edges. This should be the thickness of the rotor when new.

I checked my HD SM but there is no rotor thickness mentioned.

BTW, I am a frugal individual myself but I always ask "how much is my deductible (in case of accident) vs the added expense of getting a better quality part?" the response is usually enough to stop me from being a cheap a$$ and pony up the extra dough for the better part.

 

Why take a chance on a used one...it could be glazed,undersize or warped.

 

The brake rotors for HD are made by Sunstar. Unless it's one of the HD's that had Brembos as stock. And I think those were only front rotors. You could measure the rotor on the inside of the "hat." unless you have floating rotors. That should give you the correct thickness.
Motorcycle rotors can not be "turned" because they flex against the cutting tool. I tried it once many years ago. Now, you might be able to put the whole disk on a surface grinder. But that would probably cost as much as a new rotor, so that's out.

You must have had damage to your swept surface to wear it down to replacement limit. Or, you have a bunch of miles on that rotor. My rotors were fine at 130,000 miles.

 

Rotor not a good area to go cheap. Put a set on a power stroke. All was good until I pulled my big trailer the first time and put a load of the brakes. Wrap them both

 

Hunt around your local indy shops for pull offs they will have stashed if that doesn't do it man up and source a new one from amazon or a 20% off harley dealer on line. Some place that cheap bastard bit bites you in the *** and this is one of them and this comes from a guy who used to build his bikes from swap meets and buddies junk piles.

 

Might have to go with official OEM. However, here's a copy and paste:

Genuine Harley-Davidson® Product
Made in Japan