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murrayg's posts

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Feb. 6, 2016, 11:06 p.m.
Posts: 3
Joined: Sept. 1, 2015
Saint/Zee vs. Magura MT7/MT5 : mini review

No worries at all Drew and no offence taken. I appreciate your detailed questions, as I too want to understand the root cause of the problem. I should have mentioned I noticed oil on the MC plate soon after receiving the brake, which suggests a manufacturing problem. Initially I thought it might just be residual oil that bled out during fabrication or factory assembly.

Anyway, my intent here is not to single out Magura. They make excellent products with very high build qualities. In this case, I just wanted to share my experience in case others observe something similar. FWIW, the rear brake has been performing very well, so I do think (hope) that this is an isolated/rare case.

Happy trails…

Feb. 6, 2016, 4:36 p.m.
Posts: 3
Joined: Sept. 1, 2015
Saint/Zee vs. Magura MT7/MT5 : mini review

The leak appears to be from a seal inside the master cylinder assembly where the post on the actual lever makes contact with the aluminum plate of the cylinder. As the lever is actuated, the post pushes the plate and you can hear an audible squishing sound and you can see a little oil coming out of the cylinder. The rear brake is dry and there is no audible sound.

At first I thought it was residual oil from the bleeding process, but when riding there was a lot of inconsistency in the contact point and the lever was moving closer to the bar during the ride, particular during extended braking (e.g. down Severed). I checked all other fitting locations where the brake line enters the lever and at the caliper and they are all dry. The only place I can see air getting into the system is through a seal leak in the cylinder. I have read of similar issues on-line, but it doesn't appear to be a prevalent problem.

Anyway, it will be interesting to see what CRC/Magura have to say (I will follow up in a couple of weeks). Unfortunately, from Google searches and MTBR threads, it appears that Magura does not any master cylinder assemblies available after-market, so hopefully they will warranty the entire lever assembly.

Feb. 6, 2016, 12:23 p.m.
Posts: 3
Joined: Sept. 1, 2015
MT5 Issue

Long time lurker, first time poster. Thanks for all the great info. on the MT5/MT7! Like Drew, I am not that thrilled with the on/off performance (aka poor modulation) of my XT brakes, so I took the plunge and purchased MT5s through CRC. Fit up went well, cut lines bled brakes (with Magura bleed kit), no leaks. Performance (power, modulation, lever feel) seem great. After a couple of rides, however, noted small leak in the master cylinder of the front brake. Emailed CRC and am shipping back for warranty replacement - aargh! I am starting to think that perhaps XTR race (i.e. non ServoWave) levers might be a better way to go, as I am not sold on the carbotecture Magura levers. Has anyone else experienced this problem? Has anyone tried Shimano levers? Cheers and Thanks.

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