Inverted Rear Caliper: Curvy to Sharpy style - SV650.org

19-03-05, 10:44 PM

Today I was messing about today getting my calipers ready for power coating and had to remove my rusting torque arm.

Then it hit me there's no reason the curvy SV can not be like all the new bikes and have the caliper on-top rather than below.

All you need to do is loosen the rear wheel, bash the caliper holder round with a rubber mallet and re-fit. Move the hose next to pump 90 degrees clockwise to remove new slack and it fits fine.

Then need to make a torque bracket that fits to the swingarm, a little more difficult but not impossible.

Just a thought. Has anyone else tried it?

northwind · 20-03-05, 02:04 AM

I've seen it done on race bikes, but only when the rules required a rear caliper but the rider didn't expect to use it... To make it actually work would be trickier... You thinking of puting a bracket around the swingarm, sort of thing?

timwilky · 20-03-05, 07:05 AM

Andrew

Please think about it.

Firstly I doubt that you could move the caliper 90 degrees as it would strike the back section of the swinging arm you would be looking more at 150

Secondly the air in the caliper need to be bled. to do this you must have the bleed nipple at the highest point otherwise you would get an air lock.

moving the caliper through 90 degrees would ensure about 40% air in the caliper and to move it further simply increases the amount of air trapped in the caliper.

OK other threads have asked about who uses thier rear brakes. You might not, even for emergencies. But I do think the C&U Regs to require the brake to work.

Sid Squid · 20-03-05, 08:07 AM

It might be easier to another suitable caliper, if you spin the support bracket 180 degrees it will be fine, but the torque arm lug on the caliper will be at the back.

Whole job is way more trouble than it's worth.

20-03-05, 09:14 AM

The caliper goes 180 degrees + but the pipe at the cylinder ends needs to be moved 90 degrees to take up the slack.

Northwind, my idea exactly. Means no torque arm to worry about and the caliper wont get crap in it.

Brake still works fine. It's an idea anyway.

20-03-05, 11:51 AM

Do it Andrew, it sounds like another of your groundbreaking great ideas...

snigger

Dan

TSM · 20-03-05, 07:27 PM

just an idea does a K3-4 swingarm fit on K1-2?

northwind · 20-03-05, 09:26 PM

Tim has a good point about bleeding the caliper... You'd need to do it right way up then turn it over, and it might still have a tendancy to gather air in the pistons- though of course a well bled system won't have any air in it anyway.

It seems to be a fairly common mod with the wee Brembos for US race bikes, but they're either not very functional, or butt ugly, and no room inbetween. Sid's right that you'll be left with the torque arm mounting on the wrong side, which is going to look rotten... But it should be relatively simple to brace it, since the rotational force would spin the caliper towards the swingarm- it's easier to brace for pushing towards than it is for pulling away.

It's an interesting idea, but the skeptics win

Unless you were doing it with a totally new caliper and bracket, it's never going to look better than a bodge IMO.

20-03-05, 09:36 PM

forget it mate... never try and mod your brakes.. it is simply not worth it...

20-03-05, 09:38 PM

Could also invalidate your insurance in the event of a claim.

.

19-03-05, 10:44 PM	#1
snoopy Guest Posts: n/a	Inverted Rear Caliper: Curvy to Sharpy style Today I was messing about today getting my calipers ready for power coating and had to remove my rusting torque arm. Then it hit me there's no reason the curvy SV can not be like all the new bikes and have the caliper on-top rather than below. All you need to do is loosen the rear wheel, bash the caliper holder round with a rubber mallet and re-fit. Move the hose next to pump 90 degrees clockwise to remove new slack and it fits fine. Then need to make a torque bracket that fits to the swingarm, a little more difficult but not impossible. Just a thought. Has anyone else tried it?

20-03-05, 02:04 AM	#2
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	I've seen it done on race bikes, but only when the rules required a rear caliper but the rider didn't expect to use it... To make it actually work would be trickier... You thinking of puting a bracket around the swingarm, sort of thing? __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

20-03-05, 07:05 AM	#3
timwilky Member Mega Poster Join Date: Mar 2004 Location: Not in Yorkshire. (Thank God) Posts: 4,116	Andrew Please think about it. Firstly I doubt that you could move the caliper 90 degrees as it would strike the back section of the swinging arm you would be looking more at 150 Secondly the air in the caliper need to be bled. to do this you must have the bleed nipple at the highest point otherwise you would get an air lock. moving the caliper through 90 degrees would ensure about 40% air in the caliper and to move it further simply increases the amount of air trapped in the caliper. OK other threads have asked about who uses thier rear brakes. You might not, even for emergencies. But I do think the C&U Regs to require the brake to work. __________________ Not Grumpy, opinionated.

20-03-05, 08:07 AM	#4
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	It might be easier to another suitable caliper, if you spin the support bracket 180 degrees it will be fine, but the torque arm lug on the caliper will be at the back. Whole job is way more trouble than it's worth. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

20-03-05, 07:27 PM	#7
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	just an idea does a K3-4 swingarm fit on K1-2? __________________ OTR: KTM 690 Duke R 2015 Full Akro SIDELINE: Kwak ZX636 A1P 2002, Red, R&G's, Yoshi, Double Bubble Screen GONE: Kwak ZX-7R P1, Full Akro, Undertray, Screen GONE: SV650S K2 Very Bruised & Without Fairing, Motovation Frame Sliders, R&G Ally Sprocket Toe Protector, HEL 2 Line Setup, GSXR K1 600 RWU Forks, Barnett Clutch & Springs, Penske 8981 Shock, Gilles Ti Rearsets, Steel Barends, Scottoiler, AFAM Chain & Sprockets, Twin FIAMM Horns, Skidmarx Bellypan, Full Micron Zeta Steel System, Cut down undertay. Forum Problems & Information / Site Suggestions

20-03-05, 09:14 AM	#5
snoopy Guest Posts: n/a	The caliper goes 180 degrees + but the pipe at the cylinder ends needs to be moved 90 degrees to take up the slack. Northwind, my idea exactly. Means no torque arm to worry about and the caliper wont get crap in it. Brake still works fine. It's an idea anyway.

20-03-05, 11:51 AM	#6
Dan_SV Guest Posts: n/a	Do it Andrew, it sounds like another of your groundbreaking great ideas... snigger Dan

20-03-05, 09:26 PM	#8
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	Tim has a good point about bleeding the caliper... You'd need to do it right way up then turn it over, and it might still have a tendancy to gather air in the pistons- though of course a well bled system won't have any air in it anyway. It seems to be a fairly common mod with the wee Brembos for US race bikes, but they're either not very functional, or butt ugly, and no room inbetween. Sid's right that you'll be left with the torque arm mounting on the wrong side, which is going to look rotten... But it should be relatively simple to brace it, since the rotational force would spin the caliper towards the swingarm- it's easier to brace for pushing towards than it is for pulling away. It's an interesting idea, but the skeptics win Unless you were doing it with a totally new caliper and bracket, it's never going to look better than a bodge IMO. __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

20-03-05, 09:36 PM	#9
DeeJay Guest Posts: n/a	forget it mate... never try and mod your brakes.. it is simply not worth it...

20-03-05, 09:38 PM	#10
jonboy Guest Posts: n/a	Could also invalidate your insurance in the event of a claim. .

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