62 Chopped FL Rebuild

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2Loose
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Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Mon Sep 25, 2017 12:42 am

I need to find more aggressive front brake pads, if I can't, I need to learn how to modify the pads I have to be more aggressive. Ah ha, a future worthy project. Gee, I'm sure glad I do not have enough projects to keep me busy.... (somebody shoot me....)
The faster I go, the behinder I get....
I never look over my shoulder, I know what's back there, and it scares the hell outta me !!

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budoka
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SELF INTRODUCTION: I'm a Kentucky boy who's found himself transplanted into Japan. been into turning wrenches as long as i can remember. i love muscle cars, hotrod bikes, and the martial arts.

been a member of this board since back when it was a part of Chopperweb. been handling the tech side and sharing the admin duties for several years now.
Location: Yamanashi Shi, Japan
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Re: 62 Chopped FL Rebuild

Post by budoka » Thu Sep 28, 2017 11:02 am

i feel your pain man, i feel your pain. i'm just excited for you that you've got it down to those little things. don't let up now, only a few more things and you'll be spending quality time with it as often as you like.

take care,
-dan
-experience is a wonderful thing. It enables you to recognize a mistake when you make it again.
http://knuckleheadsummer.blogspot.com/

User avatar
2Loose
Conventioneer
Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Fri Sep 29, 2017 5:03 pm

Meanwhile, I need to improve that front brake on the 62 pan, I had originally set up a rotor and caliper from an '85 Suzuki Madura motorcycle, fabbing adapters to my '62 FL front forks and star hub:
Image

Looking at a drilled rotor, something like this one, but having a difficult time finding the correct one to replace the Suzuki rotor that's on there now:
Image

And better, high perf pads:
Image

Thought I'd try the pads first, see how, if that improves the braking on the front end, then swap the disk and see how much difference that makes....
And not too expensive, fun to try stuff like this and evaluate it...
Aloha,
Willy

(Updated: posted different pix....)
Last edited by 2Loose on Sun Oct 01, 2017 2:27 pm, edited 1 time in total.

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budoka
Site Admin
Posts: 357
Joined: Thu Jul 21, 2011 12:51 pm
SELF INTRODUCTION: I'm a Kentucky boy who's found himself transplanted into Japan. been into turning wrenches as long as i can remember. i love muscle cars, hotrod bikes, and the martial arts.

been a member of this board since back when it was a part of Chopperweb. been handling the tech side and sharing the admin duties for several years now.
Location: Yamanashi Shi, Japan
Contact:

Re: 62 Chopped FL Rebuild

Post by budoka » Sat Sep 30, 2017 8:32 am

yeah, i love changing stuff around to get everything just like i like it, too. that's what makes it "your" chopper.

be sure to let us know how they work, that could be real good info to have.

take care,
-dan
-experience is a wonderful thing. It enables you to recognize a mistake when you make it again.
http://knuckleheadsummer.blogspot.com/

User avatar
2Loose
Conventioneer
Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Sun Oct 01, 2017 3:52 pm

Digging around some more, have not found anything on rotors for this setup, but looking at these brake pads:
Sintered metal pads...
Image
Kevlar pads:
Image
Be worth getting a pair of each and testing them out...
Last edited by 2Loose on Sun Oct 01, 2017 5:52 pm, edited 1 time in total.

Dusty-Dave
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Posts: 150
Joined: Sun Dec 01, 2013 4:43 pm
SELF INTRODUCTION: Hi,
Been building and riding since the 60s. My last contest build made The Horse BC last year "Home Built Indian" and had a 40 Indian in the TCU section of the Horse BC the year before.
Iv'e answered to Dusty since 69
Thanks
Dusty
Location: northern New Mexico

Re: 62 Chopped FL Rebuild

Post by Dusty-Dave » Sun Oct 01, 2017 5:50 pm

Another inch of rotor diameter would probably make more difference than any pad change. Generally Sintered are much better when hot not so great for everyday riding. Unless of course your everyday ride is on a race course or canyon carving.
Dusty
Driving that train, high on cocaine,
Casey jones is ready, watch your speed.
Trouble ahead, trouble behind,
And you know that notion just crossed my mind.

User avatar
2Loose
Conventioneer
Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Mon Oct 02, 2017 2:52 pm

Image
This disk and caliper I pulled off of a wrecked '85 Suzuki Madura GV700GLF motorcycle, rebuilt the caliper, and fabbed an adapter to fit it to the original '62 HD front wheel star hub, is 10-3/4" diameter. I have not been able to find a new drilled rotor to replace it, so am now thinking of drilling this one. Not a job I look forward to, but might have to in order to increase the "bite" of the pads on the disk. Am still looking online though, in hopes of finding something that will replace mine.

I had grabbed these as I liked how this smaller size looked on the front end of the panhead. Let me see what I can do with pads, and maybe drilling it, but you are correct, I may just have to go to a larger disk and remount the caliper, or even go to a more aggressive caliper with bigger pads as well, right not it is not really any better than the original '62 front brake drum, which was barely a "hill holder" !!
The faster I go, the behinder I get....
I never look over my shoulder, I know what's back there, and it scares the hell outta me !!

Dusty-Dave
Stalker
Posts: 150
Joined: Sun Dec 01, 2013 4:43 pm
SELF INTRODUCTION: Hi,
Been building and riding since the 60s. My last contest build made The Horse BC last year "Home Built Indian" and had a 40 Indian in the TCU section of the Horse BC the year before.
Iv'e answered to Dusty since 69
Thanks
Dusty
Location: northern New Mexico

Re: 62 Chopped FL Rebuild

Post by Dusty-Dave » Mon Oct 02, 2017 4:24 pm

A smaller master cylinder would increase the mechanical advantage. What size you got now and what size ate the caliper pistons. If the master isn't the one that came with this caliper a mismatch could be the problem. Too large a master cylinder bore causes great feeling lever and very weak brakes. Too small makes it relay hard to get a full lever and incredibly touchy brakes. Once you know if the hydraulic advantage is right it's easier to decide what to change.
Dusty
Driving that train, high on cocaine,
Casey jones is ready, watch your speed.
Trouble ahead, trouble behind,
And you know that notion just crossed my mind.

User avatar
2Loose
Conventioneer
Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Mon Oct 02, 2017 6:38 pm

Great comment!
I don't know the mc size, it was one I had on the shelf from a previous project, will see if there's a way I can check out the piston size without having to pull it apart, but I will if I have to. I'm aware of smaller bore mc's give more travel to pressurize the system but do so with higher pressure. That may be part of the problem.

Another consideration, when evaluating the original system, is that the Madura mc had to actuate two calipers (twin disk setup), and I'm only using one, so a mc of half the original size should be appropriate, if I could find out what that was.

Dusty-Dave
Stalker
Posts: 150
Joined: Sun Dec 01, 2013 4:43 pm
SELF INTRODUCTION: Hi,
Been building and riding since the 60s. My last contest build made The Horse BC last year "Home Built Indian" and had a 40 Indian in the TCU section of the Horse BC the year before.
Iv'e answered to Dusty since 69
Thanks
Dusty
Location: northern New Mexico

Re: 62 Chopped FL Rebuild

Post by Dusty-Dave » Mon Oct 02, 2017 10:15 pm

Here this should save you some math.
http://www.vintagebrake.com/mastercylinder.htm
Driving that train, high on cocaine,
Casey jones is ready, watch your speed.
Trouble ahead, trouble behind,
And you know that notion just crossed my mind.

User avatar
2Loose
Conventioneer
Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Fri Oct 06, 2017 2:45 pm

I'll try to figure mine out, interesting read, they do point out that the wheel diameter to disk rotor diameter also figures into it, I hadn't thought about that. 10" effective pad contact rotor diameter vs a 21" wheel, probably more like 24" at the road surface....
Heck of a mechanical advantage for the wheel vs the disk rotor....
And they point out that the mc to caliper ratio for a single piston caliper probably should be in the 14:1 to 12:1 range...
I received both my kevlar pads and my sintered metal pads, but have some other problems to address first before looking at that.

User avatar
2Loose
Conventioneer
Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Mon Nov 13, 2017 8:14 pm

I found this rotor online, it looks good, will put it and the new pads on and see if it's improved or not...
Image

User avatar
2Loose
Conventioneer
Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Fri Nov 17, 2017 2:58 pm

The '62 is sitting there just waiting for me to get on and ride....
I think it gets jealous every time I crank up the Dyna and ride away...
Image
Other projects and some family traveling have kept me away from this
bike's brake issues, but another issue has me thinking about the fuel
supply to the carb, and wondering if the carb is starving at the high end...

The last couple of runs I did with this bike, opening up the carb beyond
about half, or trying to go beyond about 50 mph, it would cut out and pop,
sounding like it just was running out of fuel....

My initial thought was that the high speed jet was plugged or otherwise
not functioning, and needed tuning or rebuilding, but then I wondered if the
fuel supply was just inadequate with the tank valve and the tubing and the
inline filter I'm using, possibly restricting the fuel flow to the carb....
Image
This fuel valve at the tank could be restrictive, it just acts weird
and doesn't seem to flow very well when I turn it on with an
empty fuel line....
Image
There could be restrictions in the old LInkert system that I still have on there....
Image
And I never seem to be able to get that air bubble out of this fuel filter....
Image
The line from the tank valve to the inline filter never seems to fill with fuel,
it always seems to be empty....
Image
The throttle cable setup opens all the way, so no problem with air flow....
Image
So, I ran some fuel flow tests....
Image
Disconnected at the bottom of the float bowl, and it ran 450 ml/minute...
Image
Then ran just through the inline filter and got 600 ml/minute...

I'm thinking I need to somehow measure what the fuel flow
is into the float bowl when the float is down and the inlet
needle is open....

Hmmmmmm......

Dusty-Dave
Stalker
Posts: 150
Joined: Sun Dec 01, 2013 4:43 pm
SELF INTRODUCTION: Hi,
Been building and riding since the 60s. My last contest build made The Horse BC last year "Home Built Indian" and had a 40 Indian in the TCU section of the Horse BC the year before.
Iv'e answered to Dusty since 69
Thanks
Dusty
Location: northern New Mexico

Re: 62 Chopped FL Rebuild

Post by Dusty-Dave » Sat Nov 18, 2017 12:44 pm

If memory serves they are supposed to flow around a quart a minute but will run in normal use at most anything over a pint. if it passes the test you show either remove the float bowl drain plug or the whole bowl if it doesn't have a drain. Be sure to hold it level while flow testing if you have to remove it. I prefer to know for sure it works in place but the drain plugs cane and went seemingly at random.
Dusty
Driving that train, high on cocaine,
Casey jones is ready, watch your speed.
Trouble ahead, trouble behind,
And you know that notion just crossed my mind.

User avatar
2Loose
Conventioneer
Posts: 245
Joined: Wed Aug 27, 2014 12:46 am
SELF INTRODUCTION: Maui boy, farm systems mechanical engineer, sugar cane and pineapple, retired, chopped a '62 FL in '68, still have it, have five HD projects in the shop right now, three are panheads. Try to work on them every day, but often looking for or waiting for parts. Nothing stock going on here, all hot rod street oriental, and mostly old style.
Location: Maui

Re: 62 Chopped FL Rebuild

Post by 2Loose » Sat Nov 18, 2017 1:29 pm

As I was only getting about a pint per minute (450 ml/min.) before it goes through the float valve, I'd bet it's less than that at the float bowl! No wonders it feels starved when I get to higher load levels....
Yup, I'm convinced I need to improve that fuel supply....

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