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Author Topic: Butterfly screws  (Read 2594 times)

Offline Ed Miller

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Re: Butterfly screws
« Reply #15 on: February 02, 2010, 03:38:12 PM »
Quote
You are supposed to grind off the peened end of the screw with a rotary-type tool before attempting to remove them.

Yep.  You can also use a file, if you have one narrow enough to fit easily through the carb bore.  The soft metal of the screws files off pretty quickly.

Ed Miller
'81 r65
Falls City, OR

Offline Semper Gumby

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  • Dances with cow!
Re: Butterfly screws
« Reply #16 on: February 02, 2010, 09:41:17 PM »
Cool discussion as it looks like I'm about to do this.

Bill Gould ?1980/03 R65 When at first you don't succeed....Moo!

bruce_launceston

  • Guest
Re: Butterfly screws
« Reply #17 on: February 03, 2010, 01:40:07 AM »
Hi Rob

Bought my LS with only 2000km on it, wasn't even run it.
It just kept getting better and better.

Cheers

Offline Rob Valdez 79 R65

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Re: Butterfly screws
« Reply #18 on: February 03, 2010, 01:46:02 AM »
That is nice to find a bike that one or many previous owners have not made "their own"!

bruce_launceston

  • Guest
Re: Butterfly screws
« Reply #19 on: February 03, 2010, 06:27:13 AM »
The original owner didn't give it a fair chance, he must have only kept it a couple of months. Apparently he bought a Harley after trading the R65LS back to the BMW dealer.
It sat in the dealership for a few months before I traded my Honda CB1100F in on it. (I couldn't afford to keep tyres on the couple of big jap bikes I owned before I bought the BM.)

As I said earlier I remember it loosening up as it was 'running in', it now has nearly 92,000 km on it and still has never had the heads off....

but it's had 1 timing chain, 3 new batteries, 2 rear main seals, 1 alternator rotor rewind, 1 gear shaft seal, 1 pinion? seal, 10 rear tyres, 6 front tyres, 2 master cylinder kits, 2 sets of brake pads, 1 rear brake shoe reline, 2 sets diaphrams, 1 set needles and seats, 3 air filter elements, 2 clutch cables, a few throttle cables, 1 speedo rebuild, 1 new exhaust system, 1 new sidecover, 1 set new brake rotors, 2 resprays, 2 seat recovers and a few other odds and ends.

« Last Edit: February 03, 2010, 06:31:59 AM by bruce_launceston »

Offline wilcom

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Re: Butterfly screws
« Reply #20 on: February 10, 2010, 09:15:45 PM »
I have the Bing video on rebuilding their carbs and they say multiple times to PEEN the screws and DO NOT trust Loctite to hold them in place.

 When that screw does come lose guess where's it gonna go?   Yep........now think how long it's gonna be in there before it spits out the exhaust port.......... not a pretty picture!  

Considering the damage that can occur,  I'd play by the rules on that one!

Of course that's just my $0.02
Joe Wilkerson
Telephone man with a splash of Data
Menifee, CA

Present:
1984 BMW R65LS "Herr Head"
past:
1982 BMW R65LS
1979 R65
1980 R65
1982 R80RT
1974 R90/6
1972 R75
1964 R50/2
19xx R27
ZX-11

Offline Barry

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Re: Butterfly screws
« Reply #21 on: February 11, 2010, 04:06:02 AM »
I must admit I would have been tempted to use loctite but I recently read on the Airhead list that Tom Cutter has known loctited butterfly screws to come out and cause engine damage.
Barry Cheshire, England 79 R45