Master Cylinder cover screws
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Joined: 13 Jul 2011
Posts: 35

Mon Feb 27, 2012 1:13 am quote

I have an ET4 125 and need to top up the brake fluid.

Do any of you know a trick for loosening the screws on master cylinder cover.
Piaggio B125, Yamaha YZF R6, Vespa GT125, KTM Duke 125
Joined: 12 Oct 2010
Posts: 328
Location: London
Mon Feb 27, 2012 3:05 am quote
Use a screw driver?

Only joking, if they're rusted try some penetrating oil, Wd or a impact screwdriver on low settings. If all else fails then a cheap screw removal kit will do the job
GTS 250
Joined: 29 Jul 2008
Posts: 571
Location: Lehigh Valley, PA
Mon Feb 27, 2012 5:31 am quote
I just replaced mine yesterday for the GTS w/ stainless ones from, one side was stubborn. Putting the screw driver in the slots... and giving a gentle tap w/ rubber mallet to top of screw driver, did the trick.
Joined: 13 Jul 2011
Posts: 35

Mon Feb 27, 2012 5:53 am quote
Thank You
Yes thanks have tried the options of mallet and oil. seem to be rounding the screws.

have decided to get a new one. it is a bit old and the rubber round the leaver seals look decidedly dodgy.

So startedby changing the disc and pads have ended up changing hub caliper and now master cylinder all down to old seized bolts and screws.
Grumpy Biker
1980 Vespa P200e (sold), 2002 Vespa ET4 (sold), 1949 Harley-Davidson FL
Joined: 27 Oct 2009
Posts: 4453
Location: Chandler, Arizona, USA
Mon Feb 27, 2012 7:21 am quote
See this topic for more suggestions... Seized Brake Cylinder Screws
MV Santa
GTS250, 1960 VBA, 1975 VBC, 1980 P200E cutdown
Joined: 04 May 2010
Posts: 3951
Location: Sedgwick, Kansas
Mon Feb 27, 2012 10:48 am quote
One trick I've used is valve grind compound. It's a paste with an abrasive grit in it. You can get it at any parts store.
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