Help request Custom work

[tok78]

Hey guys, it has been a while since I last posted.

I bought a Harley Sportster as a custom project last year and have been spending a lot of time tinkering.

I am currently improving the brakes. I intend to swap the HD front calliper for a Blackbird Front LHS calliper.

Basically, this is a partial delinking question.

My question is this: where do I drill the calliper in order to have all pistons working when I use the front brake lever?

Secondary question: is is it worth the bother of drilling?

I have looked on the forum and am unsure what is the best way to get all pistons working?

 

[ianrobbo1]

You may be as well asking Taffy or the old git for help like that!! :dunno:

 

[CBRDEAN0]

My question is this: where do I drill the calliper in order to have all pistons working when I use the front brake lever?

Identify the position here - http://www.google.co.uk/imgres?um=1&sa=N&biw=1366&bih=605&hl=en&tbm=isch&tbnid=7HgEceUHz3rDdM:&imgrefurl=http://www.blackbirdownersclub.eu/phpBB3/viewtopic.php%3Ff%3D2%26t%3D106&docid=ueUgYiC5S2bzWM&imgurl=http://www.pbase.com/redbird1137/image/36805142.jpg&w=800&h=600&ei=aoKrUu3rKa-A7QabYQ&zoom=1&iact=rc&page=1&tbnh=141&tbnw=172&start=0&ndsp=25&ved=1t:429,r:12,s:0,i:119&tx=86&ty=74

Drill Here - http://www.google.co.uk/imgres?um=1...ndsp=25&ved=1t:429,r:16,s:0,i:131&tx=73&ty=79

 

[Jaws]

First question is what master cylinder are you going to fit ?

You need to measure the swept volume of the pistons and then fit a matching master cylinder, otherwise the brake will either feel like wood or have too much travel

Even on the full delink kit we do not recommend using the centre piston..
Basic hydraulic law kicks in.. The smallest piston will always move first.. and that means a small time lag before you get full power when applying the brakes.

I would personally not bother. believe me, two pistons will deliver enough stopping power to twist the forks on a hog if you aint careful..

Why not look at swapping the front end for something that has disks both sides ?

Mind you, if you are sticking with the standard lump I cn understand why you would not need to.

having said that, the sporster is the ONLY hog I would entertain.
I was quite impressed with the way they went round corners

 

[tok78]

First question is what master cylinder are you going to fit ?

You need to measure the swept volume of the pistons and then fit a matching master cylinder, otherwise the brake will either feel like wood or have too much travel

Even on the full delink kit we do not recommend using the centre piston..
Basic hydraulic law kicks in.. The smallest piston will always move first.. and that means a small time lag before you get full power when applying the brakes.

I would personally not bother. believe me, two pistons will deliver enough stopping power to twist the forks on a hog if you aint careful..

Why not look at swapping the front end for something that has disks both sides ?

Mind you, if you are sticking with the standard lump I cn understand why you would not need to.

having said that, the sporster is the ONLY hog I would entertain.
I was quite impressed with the way they went round corners

After doing a complete rebuild on the bike, I'm not going to source a new fork for twin discs. With a stage 1 sportster, it's overkill anyway...

I'll have a play with the standard caliper and fab a bracket.

I'll stick with the stock m/cyl and if it's no good, I'll swap it out for something else..

As to the only HOG you'd ever ride I p/xd the 'bird against a Road King. The reason was that I couldn't tinker with the 'bird. The RK is great for messing about with. Different bike though..

But I do miss the performance of the Blackbird. If I ever get a bigger garage I'll pickup another 'bird..

 

[Centaur]

First question is what master cylinder are you going to fit ?

You need to measure the swept volume of the pistons and then fit a matching master cylinder, otherwise the brake will either feel like wood or have too much travel

Even on the full delink kit we do not recommend using the centre piston..
Basic hydraulic law kicks in.. The smallest piston will always move first.. and that means a small time lag before you get full power when applying the brakes.

I would personally not bother. believe me, two pistons will deliver enough stopping power to twist the forks on a hog if you aint careful..

Why not look at swapping the front end for something that has disks both sides ?

Mind you, if you are sticking with the standard lump I cn understand why you would not need to.

having said that, the sporster is the ONLY hog I would entertain.
I was quite impressed with the way they went round corners

Didn't Cyclops have a sportster?

 

[Jaws]

[/COLOR]
Didn't Cyclops have a sportster?

Maybe.. but I thought it was a broken ankle ?

Still, about the same effect either way

 

[Centaur]

Maybe.. but I thought it was a broken ankle ?

Still, about the same effect either way

Twat.:-0):-0):-0)

 

[Murt]

After doing a complete rebuild on the bike, I'm not going to source a new fork for twin discs. With a stage 1 sportster, it's overkill anyway...
I'll have a play with the standard caliper and fab a bracket.
I'll stick with the stock m/cyl and if it's no good, I'll swap it out for something else..
As to the only HOG you'd ever ride I p/xd the 'bird against a Road King. The reason was that I couldn't tinker with the 'bird. The RK is great for messing about with. Different bike though..
But I do miss the performance of the Blackbird. If I ever get a bigger garage I'll pickup another 'bird..

By.. " Great for messing about with" do you mean putting things back on when they fall off??
;-0))

Murt.

 

[tok78]

By.. " Great for messing about with" do you mean putting things back on when they fall off??
;-0))

Murt.

Not at all. The RK is a solid bike and is easy to work with.

I suppose the difference is that the BB is limited in terms of what you can do yo it. Harleys are not so limited.

 

[Jaws]

The bird is really old technology.. There is very little on it that cannot be heavily modified .. Front end, rear end, bolt on parts, hell, even seen them with completely different fairings and of course nakeds..

But of course every one is different and everyone has their own idea of what is easy and what is not..

I think the main reasons I would not do a HD are lack of go, lack of stop, lack of much that can be done that has not been done by many many others..

 

[Canadian Bird]

I rode a Sportster for a year, years ago. I just out grew it and my yen for a Harley. It's your project but as my dad used to say, "you can't make a silk purse out of a sows ear." Good Luck. Harley's are pricey so I can't imagine what you're paying for them over the pond. I think the new big baggers are the ones to own and they are a 2nd mortgage. imho.