Master Cylinder Cover Screws

Hi All,
Thanks to these forums, the XJCD's and my yamaha service manual I've been working on my new to me '81 XJ650LH. I have started to change fluids and check over items on the bike.

I'm now trying to remove the two philips head screws that secure the master cylinder cover and the screw driver is jumping out and starting to chew up the philips head. Can I use a hand impact tool to jar these bolts loose without damaging the master cyclinder housing and should I pre-soak the screw heads with release oil prior to giving it another go?

Any other ideas for getting the screws out and can I easily buy new ones, is it a standard type automotive/motorcycle screw?

Thanks in advance,
chris

 

Some one keep saying use PB blaster so one day I bought a can {not cheap} but it was worth the $. I'd let them soak for a while and if you can get your hands i robertson {a # 2 or # 3 square head screwdriver I hear the US don't use them if your on the US side of Niagara Region} .If you do use an impack driver twist as you hit it but not to hard as to crack the cover or brake anything. Don't let the driver do the twist gust help you as you twist. Good luck Oh ya are you on the US side or Canadian side and were did you get the XJcd.

 

Thanks for the tip yamyboy, I'm on the Canadian side and I got the CD's by following the link here: XJCD's

Follow the instructions to mail your $12 CDN to Huntsville, ontario and it takes about 2wks to get them. Full of great info...


regards,
chris

 

Thanks I'll do that now

 

I got my cds pretty quick and they are well worth it..good luck..ridz

 

The "Ugly Screw Extractor Set" that CRAFTSMAN has will bring them out.

You'll have to replace the screws.
I uses Stainless Steel Cap Screws that look quite nice.
I think there a photo of the Master Cylinder lid in My Gallery.

 

+1 for the Craftsman screw extractors -- I've got a set and they're WAY better than the old type extractors. I've gotten a bunch of chewed up screws out already using them.

Yes you can get the screws pretty much any good hardware store.

 

Thanks for the tips guys, I'll stop by Sears on Monday and get a set of those damaged screw extractors and give 'em a go.


- Chris

 

yes - do yourself a favor! I hear the Craftsman set works well!

I had the same problem on my brake cover and tried to use the old style extractor (put in drill and set to reverse...).
Head broke off the screw and I couldn't grip it with anything, so now i'll be drilling and tapping...

 

Anyone have a link to these fancy Craftsman screw extractor? I want to see if they are the same as the ones I have.

 

They aren't ... "Easy-Outs"

They are more like a screwdriver bits with a "Twist-drill" styled end ... that "Bites" the bunged-up end of the fastener and "Screws" it out.

Once you get the screw to move and back it out ... it acts like a screwdriver tip.

The fastener is toast after it's out-of-there.

 

Success, Bought the 2pc Damaged Screw Extractor set from Sears $14.95 (canada). After soaking the screws in penetrating oil overnight I used the #1 extractor, it worked great on the front screw but tore the rear screw up even more.

The rear screw was so mangled that I ended up getting a straight blade screwdriver and gently tapping it with a hammer to create a slot. Then with slot driver still in place and a lot of downward force and twisting the rear screw came out.

New temporary screws installed (with anti-seize) until I can get some stainless screws from the hardware store. (FYI master cylinder screw size is 4mm x 0.70 by 10mm long).

Thanks for all the tips,
chris