Rear master cylinder on Gio x31

Melzie · 04-14-2012, 05:15 PM

Hi guys! I think that my rear master cylinder gave up on me, anyone know if I can buy a rebuild kit for those? Or buy a aftermarket model maybe?

Weldangrind · 04-14-2012, 07:52 PM

I think the entire setup (master, hose and caliper) is cheap and plentiful on eBay. Use a generic search term, like "dirt bike brake".

Melzie · 04-15-2012, 08:09 AM

http://www.ebay.ca/itm/200726809016?...84.m1438.l2649
This should fit right?

Weldangrind · 04-15-2012, 12:53 PM

I don't know what you have now, but measure the brake hose length and ask the seller for a measurement as well. Otherwise, does it look the same to you

FLASHLIGHTBOY · 05-21-2012, 01:03 AM

BUY IT from Gio and have the right one to start from

goofyexponent · 06-04-2012, 06:41 PM

just a quick add on tip here. The master AND caliper are the SAME between the Gio X31 AND 125cc bike. I just done brakes on both my buddies 125 and my 250. The brake pads, calipers and masters are teh same. Just a different length brake hose.

BUT, if you remove the hose from the master, save the copper washers and simply replace the master and reuse your banjo bolt and washers, you are in good shape.

Before you reuse your washers, heat them with a propane torch. Not a whole lot, just enough to make them turn a touch purple (not glowing) and use pliers to stick them in, you will NEVER have a leak from them.

I wouldn't do this to a car or truck, but on a bike, you don't have a lot to worry about should it leak a tiny bit. But if done right, you will have no leaks.

Melzie · 06-05-2012, 08:26 AM

Sweet! Thanks!

jaloos · 06-05-2012, 09:49 AM

Those washers for the banjo fittings have a rubber washer built into them.
Not sure if heating them up is a real good idea.
Your best bet IMO is when removing the fitting just leave both washers on the bolt, less chance of damaging the rubber if you dont take them off the bolt.

goofyexponent · 06-05-2012, 03:46 PM

Now THAT I did not know. If there are rubber parts, do NOT heat them.

Melzie · 06-05-2012, 04:26 PM

Thanks guys! It's my first bike and I'm a female, not always easy to fix it myself! Really appreciate it thanks!

goofyexponent · 06-05-2012, 05:56 PM

No problem at all. That's what we are all here for...help each other out.

I wonder if the copper washers have O rings or just rubber seals. I have a box of O rings of all kinda of sizes here should mine ever go.

I also found that despite me using my front brakes more, the rear ones wore out faster...which makes me wonder if the bikes came with a softer rear compound to make the brakes bite in more.

I will find out for sure as I use my brakes this summer.

goofyexponent · 06-05-2012, 06:04 PM

I don't know if you are on facebook or not, but check out the Gio site there. I have a few followers from there when I built up my engine in my X31.

jaloos · 06-13-2012, 12:33 PM

Quote:

Originally Posted by goofyexponent

I wonder if the copper washers have O rings or just rubber seals. I have a box of O rings of all kinda of sizes here should mine ever go.

No the seals are actually part of the washer.

A thin flat rubber washer on each side may work though. Say made from a tire tube or similar thin rubber.

04-14-2012, 05:15 PM	#1
Melzie Join Date: Sep 2011 Location: N-B, Canada Posts: 5	Rear master cylinder on Gio x31 Hi guys! I think that my rear master cylinder gave up on me, anyone know if I can buy a rebuild kit for those? Or buy a aftermarket model maybe?
	0

04-14-2012, 07:52 PM	#2
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I think the entire setup (master, hose and caliper) is cheap and plentiful on eBay. Use a generic search term, like "dirt bike brake". __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

04-15-2012, 12:53 PM	#4
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I don't know what you have now, but measure the brake hose length and ask the seller for a measurement as well. Otherwise, does it look the same to you __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

05-21-2012, 01:03 AM	#5
FLASHLIGHTBOY Join Date: May 2009 Location: SASKATOON Posts: 1,161	BUY FROM GIO BUY IT from Gio and have the right one to start from __________________ DEALER FOR ZSTAR & GIO PRODUCTS, TAOTAO ABIBABA ATV ETC
	0

06-04-2012, 06:41 PM	#6
goofyexponent Join Date: Jul 2011 Location: Halifax, N.S. Posts: 145	just a quick add on tip here. The master AND caliper are the SAME between the Gio X31 AND 125cc bike. I just done brakes on both my buddies 125 and my 250. The brake pads, calipers and masters are teh same. Just a different length brake hose. BUT, if you remove the hose from the master, save the copper washers and simply replace the master and reuse your banjo bolt and washers, you are in good shape. Before you reuse your washers, heat them with a propane torch. Not a whole lot, just enough to make them turn a touch purple (not glowing) and use pliers to stick them in, you will NEVER have a leak from them. I wouldn't do this to a car or truck, but on a bike, you don't have a lot to worry about should it leak a tiny bit. But if done right, you will have no leaks. __________________ Gio X31 Paid $440 for the bike new in the crate! Currently a modified, high compression, head turning MONSTER!
	0

04-15-2012, 08:09 AM	#3
Melzie Join Date: Sep 2011 Location: N-B, Canada Posts: 5	http://www.ebay.ca/itm/200726809016?...84.m1438.l2649 This should fit right?
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06-05-2012, 08:26 AM	#7
Melzie Join Date: Sep 2011 Location: N-B, Canada Posts: 5	Sweet! Thanks!
	0

06-05-2012, 09:49 AM	#8
jaloos Join Date: Mar 2012 Location: Trail - B.C. - Canada Posts: 158	Those washers for the banjo fittings have a rubber washer built into them. Not sure if heating them up is a real good idea. Your best bet IMO is when removing the fitting just leave both washers on the bolt, less chance of damaging the rubber if you dont take them off the bolt. __________________ I started out with nothing and I still have most of it left. Pocket Bike Canada is a deceitful retailer. Stay away from them.
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06-05-2012, 03:46 PM	#9
goofyexponent Join Date: Jul 2011 Location: Halifax, N.S. Posts: 145	Now THAT I did not know. If there are rubber parts, do NOT heat them. __________________ Gio X31 Paid $440 for the bike new in the crate! Currently a modified, high compression, head turning MONSTER!
	0

06-05-2012, 04:26 PM	#10
Melzie Join Date: Sep 2011 Location: N-B, Canada Posts: 5	Thanks guys! It's my first bike and I'm a female, not always easy to fix it myself! Really appreciate it thanks!
	0

06-05-2012, 05:56 PM	#11
goofyexponent Join Date: Jul 2011 Location: Halifax, N.S. Posts: 145	No problem at all. That's what we are all here for...help each other out. I wonder if the copper washers have O rings or just rubber seals. I have a box of O rings of all kinda of sizes here should mine ever go. I also found that despite me using my front brakes more, the rear ones wore out faster...which makes me wonder if the bikes came with a softer rear compound to make the brakes bite in more. I will find out for sure as I use my brakes this summer. __________________ Gio X31 Paid $440 for the bike new in the crate! Currently a modified, high compression, head turning MONSTER!
	0

06-05-2012, 06:04 PM	#12
goofyexponent Join Date: Jul 2011 Location: Halifax, N.S. Posts: 145	I don't know if you are on facebook or not, but check out the Gio site there. I have a few followers from there when I built up my engine in my X31. __________________ Gio X31 Paid $440 for the bike new in the crate! Currently a modified, high compression, head turning MONSTER!
	0