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evo boy

2013 evo rear brake problem

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Hello all my friends just purchased a 2013 300 evo and the rear brake doesn't seem to be working properly. The foot brake just seems to go all the way down to the sump plate with very little effect. Has anyone had the same problem and a fix?

Many thanks

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Are the brake pads low on material?... 2mm of material is the lower limit - if they are ok try bleeding the brake... plenty of tips on here already as to the best way to do that... if it’s still no good then you’ll need a new master cylinder piston kit... I suspect that’ll be the problem anyway... check the Caliper pistons for signs of leaking or corrosion... If the bike is new to you then if you change the calliper pistons as well and rear pads you’ll know the complete system is new and Shouldn’t give you any problems for a while. 

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Don't bother re-kitting evo rear brake mcyl. high rate of failure... If you enjoy spending hours and hours of your time bleeding, testing, and scratching your head when it's still not right, by all means re-kit it

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9 hours ago, thall1 said:

Are the brake pads low on material?... 2mm of material is the lower limit - if they are ok try bleeding the brake... plenty of tips on here already as to the best way to do that... if it’s still no good then you’ll need a new master cylinder piston kit... I suspect that’ll be the problem anyway... check the Caliper pistons for signs of leaking or corrosion... If the bike is new to you then if you change the calliper pistons as well and rear pads you’ll know the complete system is new and Shouldn’t give you any problems for a while. 

Thanks for the reply, the pads look good I'll try bleeding it today and see how I get on but I think it could be master cylinder.

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If you replace the master cylinder the 2017 onwards one is a direct swap and has a better outer seal.

It sounds like it just needs bleeding though.

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10 hours ago, totty79 said:

If you replace the master cylinder the 2017 onwards one is a direct swap and has a better outer seal.

It sounds like it just needs bleeding though.

I'm going to try bleeding it first thank you for your help.

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Do read everything you can on bleeding before attempting it. It’s not easy so make full use of other people’s experience.

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H

3 hours ago, lineaway said:

 OH, the funny thing is he probably just needs pads.

Hopefully. I put a new rear caliper on the '18 last month because the rear was acting strange after a hit. Replaced the bent disk but it still acted funky. Old caliper is still on the bench waiting to be disassembled and geeked at.

Edited by dan williams

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Thanks for everyone's help I've put a set of pads in even thos nothing wrong with you old ones and bled the brake seems OK.

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Just another quick question The front brake seems to be a bit stiff you pull the lever and its like the master cylinder piston is very slow to come back out and the don't have a full lever second time and the brake binds. Does that sound like a master cylinder repair kit needed?

Many thanks

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21 hours ago, thall1 said:

sounds more like the calliper pistons are sticking?

I'll check them thanks for your help.

 

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