CRF450 hand brake - Super Moto/Motards...

double Z · 05-04-2008, 10:44 PM

I have been working on getting a dual caliper set-up for my '03 450 but w/o much luck. I purchased an OEM rear caliper & bracket, cut & welded it to my stock bracket, installed a radial front brake lever off a gixxer, installed a new brake line to the 2nd rear caliper & bleed the hell out of it.

It sucks, won't stop me for nothing, doesn't even slow me down. I switch the lines between the calipers to test incase I had a bad one but the stopping power was the same - switched back rebleed & still nothing. My pads are good, switched them between each caliper still poor stopping. Rotor is thick & good, no air in the system, have tried another hand brake lever (before the radial) & same results. I can stop myself w/the foot brake, even lock up the rear tire.

Any suggestions? I do not have $$ to buy a hand brake kit, that is why I am making it myself.

mxsam34 · 05-05-2008, 03:31 AM

you need a 13mm(1/2in) master, nissan make a good ive been told

sports bike master's are i think 17mm(someone correct me if wrong) so the ratio is wrong, ive tried too, they dont work

PM ryan moore, he can get all the parts you need

el sammo · 05-06-2008, 02:55 AM

try using braided lines too dude they help a bit

Goodluckmonkey · 05-06-2008, 02:35 PM

I built my own dual caliper setup and tried with to small a master to start with. I have a 14mm on there now off an NC30, but could do with a 1/2 or 13mm. A lot of sportsbikes have 1/2" clutch masters, which would be a good way to go.

For details and pics of my setup >>>> http://www.stuntlife.com/forums/post...61-post36.html

Ryan Moore · 05-07-2008, 06:03 PM

Weld up a front caliper on the rear, instead of that rear caliper, and you will be good to go. The piston is way to small in the crf rear caliper. 1/2 nissan hand brake helps, but it still won't lock up 1 finger till you get a bigger caliper on the back, I run a Braking Supermoto rear caliper and one finger all day long now!! Took me 2 years and hundreds of dollars, and 4 masters

to figure it out

double Z · 05-08-2008, 01:39 AM

Alright thanks for the help guys, im going to try a bigger rear caliper.

05-04-2008, 10:44 PM	#1
double Z Registered User Join Date: Apr 2008 Location: Maple Valley, WA, US Age: 16 Bike: 01 f4i, 03 CRF450R, 05 CRF70 Gender: Male Posts: 32	CRF450 hand brake I have been working on getting a dual caliper set-up for my '03 450 but w/o much luck. I purchased an OEM rear caliper & bracket, cut & welded it to my stock bracket, installed a radial front brake lever off a gixxer, installed a new brake line to the 2nd rear caliper & bleed the hell out of it. It sucks, won't stop me for nothing, doesn't even slow me down. I switch the lines between the calipers to test incase I had a bad one but the stopping power was the same - switched back rebleed & still nothing. My pads are good, switched them between each caliper still poor stopping. Rotor is thick & good, no air in the system, have tried another hand brake lever (before the radial) & same results. I can stop myself w/the foot brake, even lock up the rear tire. Any suggestions? I do not have $$ to buy a hand brake kit, that is why I am making it myself.

05-05-2008, 03:31 AM	#2
mxsam34 Registered User Join Date: Nov 2007 Location: Magnetic Island, Australia Age: Bike: Husky sm450r Gender: Male Posts: 68	Re: CRF450 hand brake you need a 13mm(1/2in) master, nissan make a good ive been told sports bike master's are i think 17mm(someone correct me if wrong) so the ratio is wrong, ive tried too, they dont work PM ryan moore, he can get all the parts you need

05-06-2008, 02:55 AM	#3
el sammo Registered User Join Date: Feb 2007 Location: Boomtown, Australia Age: 25 Bike: f4i Gender: Male Posts: 144	Re: CRF450 hand brake try using braided lines too dude they help a bit

05-06-2008, 02:35 PM	#4
Goodluckmonkey Registered User Join Date: Apr 2003 Location: S. E. England Age: 26 Bike: WR 426 F Supermoto Gender: Male Posts: 280	Re: CRF450 hand brake I built my own dual caliper setup and tried with to small a master to start with. I have a 14mm on there now off an NC30, but could do with a 1/2 or 13mm. A lot of sportsbikes have 1/2" clutch masters, which would be a good way to go. For details and pics of my setup >>>> http://www.stuntlife.com/forums/post...61-post36.html __________________ [img]http://us.f1.yahoofs.com/users/fd759be4/bc/Stuff%2bPeeps/MEwheelie.jpg?bc3Gsi.Aa_aMAAEe[/img]

05-07-2008, 06:03 PM	#5
Ryan Moore Registered User Join Date: Nov 2006 Location: Grover Beach, CA Age: Bike: 50, 70, 450 f4i Gender: Male Posts: 284	Re: CRF450 hand brake Weld up a front caliper on the rear, instead of that rear caliper, and you will be good to go. The piston is way to small in the crf rear caliper. 1/2 nissan hand brake helps, but it still won't lock up 1 finger till you get a bigger caliper on the back, I run a Braking Supermoto rear caliper and one finger all day long now!! Took me 2 years and hundreds of dollars, and 4 masters to figure it out

05-08-2008, 01:39 AM	#6
double Z Registered User Join Date: Apr 2008 Location: Maple Valley, WA, US Age: 16 Bike: 01 f4i, 03 CRF450R, 05 CRF70 Gender: Male Posts: 32	Re: CRF450 hand brake Alright thanks for the help guys, im going to try a bigger rear caliper.