Sprocket De-chroming
#1
Sprocket De-chroming
So I just got my first Harley last summer(2008 Ultra Classic), I've been on bikes since my teens so going on 30 years now. As I'm new to all things HD I took my bike to the dealer for a once over shortly after I bought it. The only issue of note was that they told my driven sprocket was de-chroming and needed to be replaced, otherwise it would lead to premature belt wear. Does that sound legit? I have no problem with the repair, happy to do it, I just want to make sure I'm not being fed a line.
Thanks,
Thanks,
#2
#3
My 04 Softail at around 30,000 had worn the chrome off. I drove when on the way to work about 5 miles of grooved concrete interstate.
It left a fine grinding dust on everything.
At 50,000, you could see a slight orange peal finish on the cog sprocket. Same on the belt but form was still good on both.
It's not like a major disaster in my opinion if form is good. If you need a new belt, going on a cross country trip or such, it should be replaced.
Say you damage the belt with a rock, you should always see if aluminum will scratch with a scribe. That shows hard chrome is worn off. Mine never peeled.
Always replace both cog sprockets and belt. That's called out in service manual.
Actually, soft wears harder. The grit gets in the rubber. That wears thru the hard chrome . That wears the aluminum of course faster then.
Same with spinning shafts in rubber seals. The shafts groove.
My rambling overall logic here is you don't worry about old belt since no matter it's shape, it needs replaced if form is gone on sprocket.
Form and belt OK? You could easily go 20, 40 thousand mile.
However get you a 10lb tension gage. About $10 or you can pay $50 for same one. You choice . Make sure tension is good.
Mine sets with me laying over seat. Yours is probably unladen and you probably may have a window with marks on it.
Do the YouTube for your exact model.
Once correct, like a correctly set clutch, unless you hot rod and abuse it, it rarely changes. The lever freeplay does tend to grow but that's easily set by you.
I like mine at minimum checked at both bar stops. It's not critical. Just make sure there is some when engine is hot.
The actual clutch back off is set behind derby cover with cold engine.
It left a fine grinding dust on everything.
At 50,000, you could see a slight orange peal finish on the cog sprocket. Same on the belt but form was still good on both.
It's not like a major disaster in my opinion if form is good. If you need a new belt, going on a cross country trip or such, it should be replaced.
Say you damage the belt with a rock, you should always see if aluminum will scratch with a scribe. That shows hard chrome is worn off. Mine never peeled.
Always replace both cog sprockets and belt. That's called out in service manual.
Actually, soft wears harder. The grit gets in the rubber. That wears thru the hard chrome . That wears the aluminum of course faster then.
Same with spinning shafts in rubber seals. The shafts groove.
My rambling overall logic here is you don't worry about old belt since no matter it's shape, it needs replaced if form is gone on sprocket.
Form and belt OK? You could easily go 20, 40 thousand mile.
However get you a 10lb tension gage. About $10 or you can pay $50 for same one. You choice . Make sure tension is good.
Mine sets with me laying over seat. Yours is probably unladen and you probably may have a window with marks on it.
Do the YouTube for your exact model.
Once correct, like a correctly set clutch, unless you hot rod and abuse it, it rarely changes. The lever freeplay does tend to grow but that's easily set by you.
I like mine at minimum checked at both bar stops. It's not critical. Just make sure there is some when engine is hot.
The actual clutch back off is set behind derby cover with cold engine.
Last edited by Jackie Paper; 02-21-2024 at 08:40 AM.
#4
So I just got my first Harley last summer(2008 Ultra Classic), I've been on bikes since my teens so going on 30 years now. As I'm new to all things HD I took my bike to the dealer for a once over shortly after I bought it. The only issue of note was that they told my driven sprocket was de-chroming and needed to be replaced, otherwise it would lead to premature belt wear. Does that sound legit? I have no problem with the repair, happy to do it, I just want to make sure I'm not being fed a line.
Thanks,
Thanks,
It will get worse before it gets better so plan accordingly .
Had a rock go through my belt and only found out was the next day when I went out to start it up to ride to work .
With a second opinion from an independent source or before heading out on a multi day road trip would I change it out this week.
Then again with riding season in BC rolling ahead fast now might be the time to get it done.
Repairs on the side of the road are a PIA and $$$ , more so than a planned service interval.
Regards from near Sunny Tsawwassen.
Rob
#5
#7
i got a bridge to sell you located in brooklyn, ny
that chrome does diddly for wear, mostly a corrosion control aspect. stop and think about it: the aluminum is soft and wears to fit the belt. there is only a small contact patch where the belt applies load, most belts are most or less self lubricating so not much of a friction area. also of note, these are NOT billet, cost would be out the roof so a cast is used. that said, you will see pocks and such but of no concern since they are mostly below the surface.
if you are that concerned, there was a company that made composite pulleys. my 2001 sport happy with the same one from get-go. i would venture to say preload of the belt causes more wear and loading of the bearings.
that chrome does diddly for wear, mostly a corrosion control aspect. stop and think about it: the aluminum is soft and wears to fit the belt. there is only a small contact patch where the belt applies load, most belts are most or less self lubricating so not much of a friction area. also of note, these are NOT billet, cost would be out the roof so a cast is used. that said, you will see pocks and such but of no concern since they are mostly below the surface.
if you are that concerned, there was a company that made composite pulleys. my 2001 sport happy with the same one from get-go. i would venture to say preload of the belt causes more wear and loading of the bearings.
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VanIsleGuy (02-21-2024)
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#8
i got a bridge to sell you located in brooklyn, ny
that chrome does diddly for wear, mostly a corrosion control aspect. stop and think about it: the aluminum is soft and wears to fit the belt. there is only a small contact patch where the belt applies load, most belts are most or less self lubricating so not much of a friction area. also of note, these are NOT billet, cost would be out the roof so a cast is used. that said, you will see pocks and such but of no concern since they are mostly below the surface.
if you are that concerned, there was a company that made composite pulleys. my 2001 sport happy with the same one from get-go. i would venture to say preload of the belt causes more wear and loading of the bearings.
that chrome does diddly for wear, mostly a corrosion control aspect. stop and think about it: the aluminum is soft and wears to fit the belt. there is only a small contact patch where the belt applies load, most belts are most or less self lubricating so not much of a friction area. also of note, these are NOT billet, cost would be out the roof so a cast is used. that said, you will see pocks and such but of no concern since they are mostly below the surface.
if you are that concerned, there was a company that made composite pulleys. my 2001 sport happy with the same one from get-go. i would venture to say preload of the belt causes more wear and loading of the bearings.
#9
#10
I'm not sure if that's a crack in the rubber, I'll have a closer look tomorrow.