ADVrider

Go Back   ADVrider > Bikes > Old's Cool
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 01-29-2011, 04:54 PM   #1
ajdemma OP
Gnarly Adventurer
 
ajdemma's Avatar
 
Joined: Aug 2004
Location: Atlanta, GA
Oddometer: 155
Bad threads on /5 final drive filler hole...

Hi All,

I decided today was the day to foray into the fluids on my relatively newly acquired R75/5. After an extensive warm-up ride (it hit 69 F today in Atlanta), I drained and refilled everything.

The final drive filler plug came out rough, and on closer inspection the threads are not happy campers...



The magnet was clean of metal, which I guess is good. I recall reading about this somewhere on the Internet, but Google is defying my searches right now.

So any reason I can't clean them up and go about my business? Top's not so hot, but the bottom half looks OK. And pros/cons about doing it in place? It's been about 16 years since I tapped something out, but that was on a nuclear submarine.

And recommendations on where to buy a tap? Sears only has an 18x1.5 in their largest set, and I'm not really keen on spending $300. Rather just get the one I need.

Thanks for you help.
__________________
-Andy '05 BMW R1200GS, '71 BMW R75/5

ajdemma screwed with this post 01-29-2011 at 04:55 PM Reason: Bad grammar.
ajdemma is offline   Reply With Quote
Old 01-29-2011, 05:48 PM   #2
anonny
What could go wrong?
 
anonny's Avatar
 
Joined: Mar 2007
Location: Beautiful Revelstoke BC
Oddometer: 5,436
A tap may make them look a little better but isn't going to make up for the missing pieces, Id look into helicoils and timecerts... wouldn't do any of the 3 in place myself.

Or plan B would be to take it off and drop off at a good machine shop.

Plan C.... if it threads back in and holds oil, ride it.
__________________
Kawasaki H1 build thread

71- 450 Honda CL re & re

Just another pathetic sheep following the herd

anonny is offline   Reply With Quote
Old 01-29-2011, 06:17 PM   #3
ajdemma OP
Gnarly Adventurer
 
ajdemma's Avatar
 
Joined: Aug 2004
Location: Atlanta, GA
Oddometer: 155
Quote:
Originally Posted by anonny View Post
Plan C.... if it threads back in and holds oil, ride it.
I don't think C is an option. Morbid curiosity made me give it a gentle try and it wants to go in crooked.
__________________
-Andy '05 BMW R1200GS, '71 BMW R75/5
ajdemma is offline   Reply With Quote
Old 01-29-2011, 06:31 PM   #4
woodgrain
In-Dented Savant
 
woodgrain's Avatar
 
Joined: Jan 2006
Location: east of Scarbaria
Oddometer: 777
There are plenty of opinions out there, so just do what feels right for you. It's aluminum and relatively soft. It's a filler plug hole.If you're interested in cosmetics go the Heli-coil/Timesert etc., route.If not, get the appropriate sized tap, grease 'er up, and clean up those threads.It needs to seal to stop the fluid from the FD from oozing out. If you're worried about the potential for leakage,the breather at the top of the FD will handle the internal pressure which builds up, especially in cold weather.Just my 2 cents ...

Woodgrain
woodgrain is offline   Reply With Quote
Old 01-29-2011, 09:10 PM   #5
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,209
I would clean the threads with a roll tap and nut a cutting tap. You can get them one at a time at good machine shop supply stores.
supershaft is offline   Reply With Quote
Old 01-30-2011, 06:26 AM   #6
Xcuvator
Justa Venturer
 
Xcuvator's Avatar
 
Joined: Jul 2007
Location: Skolls Or
Oddometer: 1,352
You can get an expanding rubber plug that will seal fine, for a couple or so bucks.. I have used them for drain plug applications.
__________________
___________________________________________

So much riding-so little time
Xcuvator is offline   Reply With Quote
Old 01-30-2011, 09:09 AM   #7
DaveBall
Beastly Adventurer
 
DaveBall's Avatar
 
Joined: Sep 2009
Location: Vancouver Island
Oddometer: 1,155
Just tap it and be done with it. Aluminum is not all that hard to tap.

Apply the KISS principle as it is an Airhead. We own and ride them because either the bike or we are simple. I am not going to try and figure out which.
DaveBall is offline   Reply With Quote
Old 01-30-2011, 09:22 AM   #8
ajdemma OP
Gnarly Adventurer
 
ajdemma's Avatar
 
Joined: Aug 2004
Location: Atlanta, GA
Oddometer: 155
Quote:
Originally Posted by DaveBall View Post
Just tap it and be done with it. Aluminum is not all that hard to tap.

Apply the KISS principle as it is an Airhead. We own and ride them because either the bike or we are simple. I am not going to try and figure out which.
I think both.

And I think I agree with you on the plan.
__________________
-Andy '05 BMW R1200GS, '71 BMW R75/5
ajdemma is offline   Reply With Quote
Old 01-30-2011, 10:54 AM   #9
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,209
Quote:
Originally Posted by DaveBall View Post
Just tap it and be done with it. Aluminum is not all that hard to tap.

Apply the KISS principle as it is an Airhead. We own and ride them because either the bike or we are simple. I am not going to try and figure out which.
That's what I was trying to say. Run a tap through it. I would run a roll tap through it. I think they are better for this app..
supershaft is offline   Reply With Quote
Old 01-30-2011, 11:35 AM   #10
bmwloco
Beastly Adventurer
 
bmwloco's Avatar
 
Joined: May 2008
Location: AsheVegas NC
Oddometer: 1,184
I am assured member of the "if it doesn't leak, don't worry" set.

30 plus Airheads in the past as many years (I even have a low Airhead number, big whoop).

Worry less, ride more.
__________________
Pastor, Church of the Horizontally Opposed Air Cooled Twin
'66 BMW R60/2, '83 BMW R100RS,
'81 BMW R100RS "Das Beast", '77 Honda XL125
Airhead #371

bmwloco screwed with this post 01-30-2011 at 11:41 AM
bmwloco is offline   Reply With Quote
Old 01-30-2011, 01:24 PM   #11
ajdemma OP
Gnarly Adventurer
 
ajdemma's Avatar
 
Joined: Aug 2004
Location: Atlanta, GA
Oddometer: 155
Quote:
Originally Posted by bmwloco View Post
Worry less, ride more.
I thought about that, but trying to fight the inclination to jam the plug back in there, go riding, and defer all this until the next time I check final drive level.

I think a roll tap is the same as a rethreading tap, no? And way too much time on the internet today makes me think they don't exist larger than M14. I'll try calling some machine tool supply places tomorrow.

In the meantime, maybe a M18x1.5 spark plug tap will work? http://www.irwin.com/tools/taps-dies...-plug-taps-hcs It's all over the web for about $7.
__________________
-Andy '05 BMW R1200GS, '71 BMW R75/5
ajdemma is offline   Reply With Quote
Old 01-30-2011, 02:26 PM   #12
ajdemma OP
Gnarly Adventurer
 
ajdemma's Avatar
 
Joined: Aug 2004
Location: Atlanta, GA
Oddometer: 155
Or even better...

An oxygen sensor thread chaser. Lisle 12230, 18M x 1.5. I think this is what I will try.

__________________
-Andy '05 BMW R1200GS, '71 BMW R75/5
ajdemma is offline   Reply With Quote
Old 01-30-2011, 03:00 PM   #13
supershaft
because I can
 
Joined: Sep 2010
Location: San Francisco Bay area
Oddometer: 8,209
A roll tap is not the same thing as a thread chaser or cleaner. Big diff!
supershaft is offline   Reply With Quote
Old 01-30-2011, 03:56 PM   #14
ajdemma OP
Gnarly Adventurer
 
ajdemma's Avatar
 
Joined: Aug 2004
Location: Atlanta, GA
Oddometer: 155
Quote:
Originally Posted by supershaft View Post
A roll tap is not the same thing as a thread chaser or cleaner. Big diff!
Please share then...
__________________
-Andy '05 BMW R1200GS, '71 BMW R75/5
ajdemma is offline   Reply With Quote
Old 01-30-2011, 04:44 PM   #15
PaulRS
Dutch fool
 
Joined: Apr 2008
Location: Holland, land of tulips and wooden shoes
Oddometer: 721
Those threads don't look too bad, I think.

Give the plug a smear of rtv, use a copper crushwasher and when it's oiltight, it's oiltight.

Don't loose any sleep over it.

Paul.
__________________
Geht net, gibbet net.
PaulRS is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 04:03 PM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014