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Old 05-30-2020, 07:07 PM   #21
rhysmort
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Default Re: Confused about brake drums

Shane,

If you go on the above website, you can look at all the parts, and it gives accurate sizing and measures. I like you on my pan went from disc (not for me) to juice drum. The Juice and mids are far more fiddly *in my opinion than the mech drums.

If I remember correctly there's a fairly thick spacer which goes behind the backing plate and over to create the correct dims. 28-555 on that sketch. That's the imperative part, if it's not right, it won't go together and run properly.

There's a good chance, you're right. I know there's two different juice drum setups as well. Look at JP's thread on here, he breaks it down real nicely!
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Old 05-30-2020, 07:16 PM   #22
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Old 05-30-2020, 07:39 PM   #23
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Old 05-31-2020, 02:08 AM   #24
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Thanks Rhys and Joe.

I’ve sorted a few pics of my setup below of how i think it all goes together, A side to the right.

Pretty sure my juice drum axle sleeve, collar, spacer and nut are all good.

The part where I come unstuck haha
Axle seems correct length - 11.5”
Axle is stepped and changes in diameter from 0.667 to 0.684.
Inner hub spacer ID is 0.656 (Smaller than axle OD)
Axle spacer ID 0.686 (fits over axle)
Bearing ID 0.659 (smaller than axle OD)

So are my bearings and inner hub spacer wrong or is my axle and axle spacer? Thanks for your help guys
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Old 05-31-2020, 07:25 AM   #25
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Default Re: Confused about brake drums

I don't have any juice parts anymore as I've had mech drums on my last 2 bikes, I'd hazard and say the bearings may be the wrong width. Or it could be your backing plate/drum combo is mix match. Check on JP's thread as it's full of great info.
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Old 05-31-2020, 11:11 AM   #26
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Default Re: Confused about brake drums

Only one bearing on right, two on left.
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Old 05-31-2020, 11:13 AM   #27
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Default Re: Confused about brake drums

Quote:
Originally Posted by Shaneo40 View Post
Thanks Rhys and Joe.

Iíve sorted a few pics of my setup below of how i think it all goes together, A side to the right.

Pretty sure my juice drum axle sleeve, collar, spacer and nut are all good.

The part where I come unstuck haha
Axle seems correct length - 11.5Ē
Axle is stepped and changes in diameter from 0.667 to 0.684.
Inner hub spacer ID is 0.656 (Smaller than axle OD)
Axle spacer ID 0.686 (fits over axle)
Bearing ID 0.659 (smaller than axle OD)

So are my bearings and inner hub spacer wrong or is my axle and axle spacer? Thanks for your help guys
Are these parts from V Twin?
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Old 05-31-2020, 04:37 PM   #28
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Thanks Gents.
Backing plate and drum are definitely correct (been through all that - originally had the wrong drum)

Yeah pretty sure the whole juice set up is vtwin. I would assume the inner hub components are the same. Acquired from a bloke about 4 years ago with just bits and pieces in a bag
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Old 05-31-2020, 07:54 PM   #29
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Default Re: Confused about brake drums

That answers the measurement problems.
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Old 05-31-2020, 10:06 PM   #30
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Quote:
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That answers the measurement problems.
Haha. What do you recommend for re-pop?
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Old 05-31-2020, 11:13 PM   #31
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Default Re: Confused about brake drums

Swap meet shopper I am.
If you have a machinist, have them whittle one out of B7.
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Old 06-01-2020, 02:55 AM   #32
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Default Re: Confused about brake drums

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Originally Posted by Shaneo40 View Post
Haha. What do you recommend for re-pop?
W&W in Germany also offer some good parts. I've used their spacers and axle on my knuck. Fit my 78 year old frame absolutely perfectly. As Joe mentioned, the repop stuff may be the issue re - drum as well. I've always sworn by and will continue to use oem. I bought a 49 panhead rear drum for my knuck in the US. Dude hadn't ran in since the 80's due to his age and wanting rotors.

I cleaned it up, very light skim etc. Good as new.
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Old 06-01-2020, 03:32 AM   #33
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Default Re: Confused about brake drums

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Swap meet shopper I am.
If you have a machinist, have them whittle one out of B7.
There is about 3 swapmeets a year in this country and as you can imagine with panheads going for $25-$30k (+), parts are not easy to come by haha.

Thanks tho gents. Yeah WW are looking the goods Rhys.
Cheers
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Old 06-01-2020, 09:30 AM   #34
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Originally Posted by Shaneo40 View Post
There is about 3 swapmeets a year in this country and as you can imagine with panheads going for $25-$30k (+), parts are not easy to come by haha.

Thanks tho gents. Yeah WW are looking the goods Rhys.
Cheers
May have to ship it all in from the US dude. It's what I always do. There's even less swap meets here in the UK, I know of 1? a year. Some of the ralleys occassionally have them but very limited! It's difficult if you're not in Japan or the US!

If you can get yourself an OEM drum and then get the hardware from W&W you'll be laughing!
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Old 06-01-2020, 09:50 AM   #35
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Default Re: Confused about brake drums

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May have to ship it all in from the US dude. It's what I always do. There's even less swap meets here in the UK, I know of 1? a year. Some of the ralleys occassionally have them but very limited! It's difficult if you're not in Japan or the US!

If you can get yourself an OEM drum and then get the hardware from W&W you'll be laughing!
What about customs in the UK ? To the netherlands we even pay taxes For the shipping costs!
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Old 06-01-2020, 10:16 AM   #36
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What about customs in the UK ? To the netherlands we even pay taxes For the shipping costs!
Same here sir. Almost all of my parts on my knucklehead were imported from the US. Minus the front wheel and handlebars the rest came from Pennsylvania or LA!
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Old 06-01-2020, 12:40 PM   #37
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Default Re: Confused about brake drums

Quote:
Originally Posted by Shaneo40 View Post
There is about 3 swapmeets a year in this country and as you can imagine with panheads going for $25-$30k (+), parts are not easy to come by haha.

Thanks tho gents. Yeah WW are looking the goods Rhys.
Cheers
Back to make one, or used OEM off evil bay.
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Old 06-03-2020, 12:42 AM   #38
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Default Re: Confused about brake drums

Australia is still in Covid fever and the Fedex shipping from WW to Aus is limited to express freight minimum $135. A little pricey for spacers.
Since the rigid frame is narrower than the round swingarm the wide brake was used in the stock spacers are useless. You must measure and cut your own length from the spacers you got.
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Old 06-03-2020, 09:14 AM   #39
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Default Re: Confused about brake drums

Between frame rails
Rigid 8 3/4'' plus or minus 1/8''

Swing arm 9 1/8''

All manufacturing being plus or minus often no modification is needed. Basically try it first, before changing.
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