OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
The point of my other thread here - Fork Swap for 150 Super - was to get ready for a disc brake front end on my '75 VBC. I finally got it done this weekend after some months of tortuous procrastination.

My main aim with this was to build something that could be assumed by the general public to be a stock fitting... well at least not to look too much out of place. And keep costs down while doing so, which is why I chose the Scoot R S kit. A friend had put one on his and it worked beautifully, so that's the direction I went.
The thing I didn't like about them was the master cylinder attachment which went against the original aim of looking stock-ish, so I collected pictures and info wherever I saw a good idea. Initially I was going to have my headset welded with an aluminium mounting plate and I got a quote of $80-100 to do it, but when it came time I didn't have the money spare. So I ended up going via the GSF (http://www.germanscooterforum.de/topic/14540-bremspumpenhalter-für-grimeca-griff) route and I'm very happy with the result.

I started by buying a Grimeca master cylinder and working out how much material needed to be removed from the headset. I cut off what I thought was probably the right amount, leaving the lever bolt hole. Unfortunately the bottom section had a crack that I hadn't seen, so when that was cut it came away. But I think that actually worked to my benefit, enabling me to use the long nut arrangement you see here.

External inline image provided by member with no explanatory text

I got a bit of scrap 3mm steel and cut it roughly to shape.

External inline image provided by member with no explanatory text

Shaped up a little and bent.

External inline image provided by member with no explanatory text

External inline image provided by member with no explanatory text

External inline image provided by member with no explanatory text

Painted and fitted the hose. It's very stiff and hard to get into tight spots... next time I'll use the thinner SIP hose kit, which has ends that come off, allowing you to thread it through smaller holes.

External inline image provided by member with no explanatory text

I used an M8 button head cap screw for the outer fixing and painted the head... you hardly see it now. At first I was a little worried about the small bit of the casting supporting the load, but the whole thing is quite strong and is not carrying much load if any in the up-and-down direction where it's weakest.

External inline image provided by member with no explanatory text

All together. Fairly neat I think.

External inline image provided by member with no explanatory text

The complete setup.

External inline image provided by member with no explanatory text

Getting everything in the headset working properly and fitting wher it would't all bind together was the biggest PITA but it works really well now.
⚠️ Last edited by Ginch on UTC; edited 1 time
@lynnb avatar
UTC

Ossessionato
1963 VBB2T
Joined: UTC
Posts: 2543
 
Ossessionato
@lynnb avatar
1963 VBB2T
Joined: UTC
Posts: 2543
UTC quote
I'm really impressed Ginch, great job. Gotta chuckle at the boots.
OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
Lynnb wrote:
I'm really impressed Ginch, great job. Gotta chuckle at the boots.
Thanks! I saw that in the pic and thought, nobody will even notice! Forgot where I was I guess!
@bobo avatar
UTC

Ossessionato
'70 Super 150, Medley 150S, '23 Ducati Monster SP
Joined: UTC
Posts: 2533
Location: Sydney, Australia
 
Ossessionato
@bobo avatar
'70 Super 150, Medley 150S, '23 Ducati Monster SP
Joined: UTC
Posts: 2533
Location: Sydney, Australia
UTC quote
Very nice work. Just in time for the Mille.
OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
Bobo wrote:
Very nice work. Just in time for the Mille.
He he! Just!
@vader19 avatar
UTC

Mr. Clean
P,SUPER,V90, 50 Special
Joined: UTC
Posts: 10205
Location: This is't my locker!
 
Mr. Clean
@vader19 avatar
P,SUPER,V90, 50 Special
Joined: UTC
Posts: 10205
Location: This is't my locker!
UTC quote
Great job G! looks really pro! 8)
@portly avatar
UTC

Member
gts 250, px200, t5
Joined: UTC
Posts: 17
Location: South Oxfordshire
 
Member
@portly avatar
gts 250, px200, t5
Joined: UTC
Posts: 17
Location: South Oxfordshire
UTC quote
Hey, that's nice ! I had a GS frame a few years ago and I spent a long time trying to figure out how I was going to get a hydraulic conversion on it ... and I thought .. and I thought ... and then I sold the frame.

Your conversion looks factory fitted; nice work !
OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
portly wrote:
Hey, that's nice ! I had a GS frame a few years ago and I spent a long time trying to figure out how I was going to get a hydraulic conversion on it ... and I thought .. and I thought ... and then I sold the frame.

Your conversion looks factory fitted; nice work !
Thanks! Some time later I'll change the hose for a less obtrusive look.
@dcunited4life avatar
UTC

Molto Verboso
No moar Vespas...sold them all
Joined: UTC
Posts: 1087
Location: Denver City Denver
 
Molto Verboso
@dcunited4life avatar
No moar Vespas...sold them all
Joined: UTC
Posts: 1087
Location: Denver City Denver
UTC quote
Wow...looks really clean. I like it!
@gee-bee avatar
UTC

Banned
GTS 300
Joined: UTC
Posts: 417
Location: Rancho Mirage Calif
 
Banned
@gee-bee avatar
GTS 300
Joined: UTC
Posts: 417
Location: Rancho Mirage Calif
UTC quote
.....
Great job, should make a cnc bracket kit for others
OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
Re: .....
GEE-BEE wrote:
Great job, should make a cnc bracket kit for others
You can buy one from Scooter-Center... a bit pricey for what you get (EUR30 + postage from memory) and quite simple to make. Even mine at 3mm thick is probably thicker than it needs to be.
Forum member supplied image with no explanatory text
@koenig_blues avatar
UTC

Veni, Vidi, Posti
a not so normal vbb2 '64, a weirdo vbx '86, a not so normal pts100 '82 and a yellow sunshine '74 sprint
Joined: UTC
Posts: 5802
Location: Indo
 
Veni, Vidi, Posti
@koenig_blues avatar
a not so normal vbb2 '64, a weirdo vbx '86, a not so normal pts100 '82 and a yellow sunshine '74 sprint
Joined: UTC
Posts: 5802
Location: Indo
UTC quote
now thats look briliant Brother G
@sven avatar
UTC

Member
a few shifters
Joined: UTC
Posts: 13
Location: antwerp belgium europe
 
Member
@sven avatar
a few shifters
Joined: UTC
Posts: 13
Location: antwerp belgium europe
UTC quote
...
nice job............

quiet an idea for my gs 150 racer ( in progress....)
⬆️    About 2 years elapsed    ⬇️
@kourabies avatar
UTC

Hooked
125 TS VNL3
Joined: UTC
Posts: 141
Location: Greece
 
Hooked
@kourabies avatar
125 TS VNL3
Joined: UTC
Posts: 141
Location: Greece
UTC quote
Re: Disc brake setup for oldie
Ginch wrote:
External inline image provided by member with no explanatory text[/URL].
can u tell me about this fork? from what model? do you have anything about forks conversion and fitting on this model? great job though!
UTC

Molto Verboso
Vespa GTS 250ie
Joined: UTC
Posts: 1229
Location: San Francisco Bay Area
 
Molto Verboso
Vespa GTS 250ie
Joined: UTC
Posts: 1229
Location: San Francisco Bay Area
UTC quote
If you wanted to keep the original handlebar look, you could use the original lever with a shorter cable actuating a remote master cylinder. The remote master cylinder wouldn't have to be from/for a motorbike, it would need to have the same cylinder ID however.
OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
Kourabies if you read from the beginning you'll find the link that talks about the fork.

Fork Swap for 150 Super

I chose PX as it's cheap and needs very little to adapt it to the scooter - you can even leave it as is if you like.

You can do the semi-hydraulic conversion as SCTLVR says. I didn't do it that way because I think seeing the master cylinder on the handlebars is more natural looking than seeing the semi master cylinder on the fork. Plus I haven't heard many positive endorsements of that setup.
UTC

Molto Verboso
Vespa GTS 250ie
Joined: UTC
Posts: 1229
Location: San Francisco Bay Area
 
Molto Verboso
Vespa GTS 250ie
Joined: UTC
Posts: 1229
Location: San Francisco Bay Area
UTC quote
The master cylinder can be located anywhere you can find a spot.
I did this on a build a few years ago and it worked great while maintaining the stock appearance.
⬆️    About 4 years elapsed    ⬇️
OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
Recently I realised the stainless braiding on the hose was unravelling... also I was never that happy with the routing as it was a real pita to work on. So I got a new hose and hard line made up after a lot of thought about how it should disassemble. I'm very pleased with how it turned out. It was relatively easy to bleed, it's nice and neat, and even stays out of the way of my SIP speedo!

Several months ago I added an AF Parts brake carrier (was on special at LTH), it was described as a lower type. The very slightly flatter angle of the swing arm makes he ride feel more stable... tracking better I guess you'd call it. The radial brake caliper came from Aliexpress and is pretty good! It's exactly the same one as the Stage 6 caliper, except for the branding, and of course way cheaper.
Opened up a new hole so that the line was relatively flat and doesn't trap bubbles so easily
Opened up a new hole so that the line was relatively flat and doesn't trap bubbles so easily
Pretty easy to undo the lines by pulling up the headset a little
Pretty easy to undo the lines by pulling up the headset a little
It's a nice tight bend in there so it's right out of the way of the speedo. They did a great job making the hard line.
It's a nice tight bend in there so it's right out of the way of the speedo. They did a great job making the hard line.
I chose a black flexible hose, which was thin enough to feed through the brake cable hole. And goes with the colour scheme!
I chose a black flexible hose, which was thin enough to feed through the brake cable hole. And goes with the colour scheme!
@philos avatar
UTC

Banned
2001 LML 150 2t
Joined: UTC
Posts: 382
Location: Queensland, Aus
 
Banned
@philos avatar
2001 LML 150 2t
Joined: UTC
Posts: 382
Location: Queensland, Aus
UTC quote
That's superb! Looking great M. Love the way there's a connection at headset - very nicely thought out!
OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
Philos wrote:
That's superb! Looking great M. Love the way there's a connection at headset - very nicely thought out!
Cheers Phil!
⬆️    About 6 months elapsed    ⬇️
UTC

Lurker
VLB1T
Joined: UTC
Posts: 4
Location: Indonesia
 
Lurker
VLB1T
Joined: UTC
Posts: 4
Location: Indonesia
UTC quote
Question: I've just installed the grimeca disc brake kit on my px fork - what surprised me was the front wheel pulls slightly right under braking. Is this a common issue or something is wrong with my setup? Cheers bud!
@soul_surfer avatar
UTC

Molto Verboso
[SOLD] 2018 GTS300 Super Sport - Donatello Vespace
Joined: UTC
Posts: 1465
Location: Toronto, Ontario Canada
 
Molto Verboso
@soul_surfer avatar
[SOLD] 2018 GTS300 Super Sport - Donatello Vespace
Joined: UTC
Posts: 1465
Location: Toronto, Ontario Canada
UTC quote
That is quite a proper setup. As good as though it were factory. Well done!
OP
@ginch avatar
UTC

Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
 
Veni, Vidi, Posti
@ginch avatar
74 Super, 75 Super, PX project, LML off-roader and '66 Blue Badge Smallframe
Joined: UTC
Posts: 8643
Location: Victoria, Australia
UTC quote
Cheers Soul Surfer!
ctandjung wrote:
Question: I've just installed the grimeca disc brake kit on my px fork - what surprised me was the front wheel pulls slightly right under braking. Is this a common issue or something is wrong with my setup? Cheers bud!
No not a common issue. Sounds a bit like your fork must be slightly bent.
@koenig_blues avatar
UTC

Veni, Vidi, Posti
a not so normal vbb2 '64, a weirdo vbx '86, a not so normal pts100 '82 and a yellow sunshine '74 sprint
Joined: UTC
Posts: 5802
Location: Indo
 
Veni, Vidi, Posti
@koenig_blues avatar
a not so normal vbb2 '64, a weirdo vbx '86, a not so normal pts100 '82 and a yellow sunshine '74 sprint
Joined: UTC
Posts: 5802
Location: Indo
UTC quote
Nor u didnt put the caliper braket right in the center, common happen to a local brand like the first edition of temaca, thats why when a friends ask how to make it stay straight, i have to realignt it with a spacer
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