19” Wheel ID and Rotor Fitment

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Motocooney
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19” Wheel ID and Rotor Fitment

#1

Post by Motocooney » Sat Oct 13, 2018 3:12 pm

Hey dudes.

I’m trying to start getting the front end together.

I bought a PM springer brake kit, 11.5 ultima rotor.

First, I feel like the bearings don’t look or feel right. Wrong bearings possibly? The inner tube spacer has 3/16” side to side play.

The rotor I have doesn’t sit flat on the hub. The original rotor on the wheel has an offset. The new one does not.

New rotor has 5/16 holes, hub is tapped for 3/8-16.

What do I have here?

Heim joints are 5/16”, anchor tab on springer is 3/8”
I can prolly snag a bushing for that, right?

I’m assuming I’ll need a rotor spacer anyway (Narrow glide wheel?) so maybe that solves the offset issue on the rotor.

Anyway, I’m researching as we speak but I thought I’d get your opinions as well👍 Thx.
I’ll post pics in a sec.



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Re: 19” Wheel ID and Rotor Fitment

#2

Post by Motocooney » Sat Oct 13, 2018 3:14 pm

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Re: 19” Wheel ID and Rotor Fitment

#3

Post by Motocooney » Sat Oct 13, 2018 3:15 pm

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Re: 19” Wheel ID and Rotor Fitment

#4

Post by Motocooney » Sat Oct 13, 2018 3:21 pm

The bearings themselves have lateral play. The inner race moves in and out.

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Re: 19” Wheel ID and Rotor Fitment

#5

Post by RooDog » Sat Oct 13, 2018 5:33 pm

I had a similar concern with my new SS rotor requiring smaller screws than the tapped holes in the hub so I used Heli-Coils to reduce the hub holes to match the new rotor's screws. A word of caution though, be sure that the screw heads have adequate running clearance with the caliper bracket..... RooDog

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Re: 19” Wheel ID and Rotor Fitment

#6

Post by Motocooney » Sat Oct 13, 2018 6:30 pm

RooDog wrote:
Sat Oct 13, 2018 5:33 pm
I had a similar concern with my new SS rotor requiring smaller screws than the tapped holes in the hub so I used Heli-Coils to reduce the hub holes to match the new rotor's screws. A word of caution though, be sure that the screw heads have adequate running clearance with the caliper bracket..... RooDog
Is there a reason for not just drilling out the rotor holes?
It’s a $70 rotor and I don’t plan on using it with any other wheel.

I’m gonna source some proper rotor bolts. The hex bolts that were on it seem wrong to me.

What do u think about the wheel bearing situation?

Is this a Narrow Glide hub?

Thx, man!

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Re: 19” Wheel ID and Rotor Fitment

#7

Post by RooDog » Sat Oct 13, 2018 8:44 pm

I know nothing about your wheel/hub, but shouldn't that rotor be spaced out to meet the fork leg and caliper mounting location? If that is the case the spacer will have two sets of bolt holes and then you can use the 3/8" screws to the hub and the 5/16 for the rotor. Spacers come in many sizes, check with MidWest.... RooDog

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Re: 19” Wheel ID and Rotor Fitment

#8

Post by Buddhahoodvatoloco » Sat Oct 13, 2018 9:16 pm

Button Heads..

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Re: 19” Wheel ID and Rotor Fitment

#9

Post by Motocooney » Sat Oct 13, 2018 10:55 pm

RooDog wrote:
Sat Oct 13, 2018 8:44 pm
I know nothing about your wheel/hub, but shouldn't that rotor be spaced out to meet the fork leg and caliper mounting location? If that is the case the spacer will have two sets of bolt holes and then you can use the 3/8" screws to the hub and the 5/16 for the rotor. Spacers come in many sizes, check with MidWest.... RooDog
That is true. I’m actually figuring out spacing as we speak.

The caliper anchor bracket should be as close to square with the axle as possible right?

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Re: 19” Wheel ID and Rotor Fitment

#10

Post by Motocooney » Sun Oct 14, 2018 1:54 am

Okay check this out.

The bearings part # LM-1949

The non-primary side bearing also says 776.

Neither of these part numbers come up with anything Harley Davidson.

Wrong bearings?
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Re: 19” Wheel ID and Rotor Fitment

#11

Post by Motocooney » Sun Oct 14, 2018 2:22 am

So if this uses sealed bearings, it has to be 2000+.

It was bolted to an old Narrow Glide fxt front end.



https://www.jpcycles.com/product/202-18 ... earing-kit

I think these are what I need. Timken doesn’t make a sealed bearing for this application that I can find.

I’m pretty sure the bearings that are in the wheel are not wide enough. Should they be flush with the bore?

As is, they are about 1/8” in, then the inner race has another 1/8” of play.

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Re: 19” Wheel ID and Rotor Fitment

#12

Post by RooDog » Sun Oct 14, 2018 12:26 pm

First off, those are industry standard part numbers on the bearings not H-D numbers and there is probably no published cross over for them. They look to be tapered rollers and not sealed ball bearings. You need to identify that wheel hub as to year and fitment to get the correct bearing specs. You will also need to determine what sort and configuration of outer spacers you are going to need for your application including how to locate and secure the brake parts to maintain alignment with the rotor. Look to how Harley designed their brakes for guidance and engineering cues. Your life and safety are in the balance here. Many catalog outfits sell both assorted spacers and cut to length spacer stock.

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Re: 19” Wheel ID and Rotor Fitment

#13

Post by Motocooney » Sun Oct 14, 2018 2:31 pm

RooDog wrote:
Sun Oct 14, 2018 12:26 pm
First off, those are industry standard part numbers on the bearings not H-D numbers and there is probably no published cross over for them. They look to be tapered rollers and not sealed ball bearings. You need to identify that wheel hub as to year and fitment to get the correct bearing specs. You will also need to determine what sort and configuration of outer spacers you are going to need for your application including how to locate and secure the brake parts to maintain alignment with the rotor. Look to how Harley designed their brakes for guidance and engineering cues. Your life and safety are in the balance here. Many catalog outfits sell both assorted spacers and cut to length spacer stock.
I pulled the seals and they are in fact tapered roller bearings. They also appear to be the right bearings.

I guess I’m just a little confused about the endplay with the inner sleeve spacer.

When I push both bearings in, they seem tight with the inner sleeve. Also, when I torque down the axle, the wheel spins freely. So can I assume that the length of the inner sleeve has already been set?

Also, I can’t find any info on the inner hub. Check out this pic.

The three “fingers” inside the hub are different from each other. 2 of them appear to be worn differently?

I would think though, the axle rides on the bearings and all the inner sleeve does is set endplay on the inner races right?

So what is the purpose of these 3 cast ‘fingers’ (I don’t know what they’re called).

I found an ‘85-90 FX/soft tail manual in my dad’s stuff that seems to show this wheel. But makes no mention of the inside of the hub other than the inner spacer.
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Re: 19” Wheel ID and Rotor Fitment

#14

Post by RooDog » Sun Oct 14, 2018 2:52 pm

If the bearings don't bind up and there is no perceivable side to side end play then I would assume the inner sleve spacer to be OK. The three "fingers" are there just to locate the sleve until the axle is installed and then they do nothing. There should be a short flanged spacer setting outboard of the bearing, but installed before the seal for the seal's lips to seal against. If not, ten a non-flanged spacer to seal against, but still short enough to be considered as part of the wheel when removed from the bike. Then there would be some longer spacers to center the wheel within the fork and to work with the caliper bracket.
Point to ponder: On the stock FXST Springer the 21" front wheel is NOT centered. WTF's up with that?

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Re: 19” Wheel ID and Rotor Fitment

#15

Post by Motocooney » Sun Oct 14, 2018 3:38 pm

RooDog wrote:
Sun Oct 14, 2018 2:52 pm
If the bearings don't bind up and there is no perceivable side to side end play then I would assume the inner sleve spacer to be OK. The three "fingers" are there just to locate the sleve until the axle is installed and then they do nothing. There should be a short flanged spacer setting outboard of the bearing, but installed before the seal for the seal's lips to seal against. If not, ten a non-flanged spacer to seal against, but still short enough to be considered as part of the wheel when removed from the bike. Then there would be some longer spacers to center the wheel within the fork and to work with the caliper bracket.
Point to ponder: On the stock FXST Springer the 21" front wheel is NOT centered. WTF's up with that?
Anything but centered on a 2 wheeled contraption seems odd to me for sure!!!

I pulled the bearings, cleaned everything, repacked them, bolted up just wheeland axle with spacers and torque it down, the wheel spins about as freely as it can. A small nudge and it rotated until I stop it. Smooth as can be.

However, the spacers between the bearing and seal are not there. I’ll dig into it.

Just to be clear, as far as the main wheel spacers, to centered in the forks are nothing special right.

I see the brake kit Came with a bushing type spacer that fits inside the bracket and has a 3/4”Id then a thicker regular washer which I assume is for the other side of the caliper. Then the springer cam with just 2 2.5” spacers to be cut as needed.

I don’t have any wavy washer or thrust washers.

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