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1Back to top Go down   UGH! Stripped fork oil drain plug Empty UGH! Stripped fork oil drain plug Sun Aug 06, 2017 8:17 am

zaubertuba

zaubertuba
Silver member
Silver member
Well, between too thick a sealing washer, using too big a torque wrench, previous wear and my own ham-fistedness, I badly stripped out my fork oil drain plug on my left fork.  Like, reamed it out smooth bad.  Embarassed

I somehow managed to salvage the right plug.

What's my best remedy? Order a Time-Sert? Time to go get that tap & die set? Any better options?

As an aside, nearest I can tell the fork oil capacity for an '85 K100RS is supposed to be 380ML after a full teardown. This sound right?


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1985 K100RS
    

duck

duck
Life time member
Life time member
If you're interested I'll sell you a pair of 85 forks for $100 plus shipping. (Which shouldn't be too bad since I'm in Washington.)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

zaubertuba

zaubertuba
Silver member
Silver member
duck wrote:If you're interested I'll sell you a pair of 85 forks for $100 plus shipping. (Which shouldn't be too bad since I'm in Washington.)

Thanks very much...I obviously didn't budget for it so let's call it "Option B" for the moment.  Nice you're so close!   Cool


__________________________________________________
1985 K100RS
    

Point-Seven-five

Point-Seven-five
Life time member
Life time member
That is tough news.  Every time I touch those screws I hold my breath. 

I repaired a stripped out hole in the final drive for the speed pickup screw by inserting a pop rivet and then threading it.  It's still holding.  That was for a smaller screw though, and you may not be able to find a large enough pop rivet.

The only other fix I can think of would be to have a welder fill the hole and then drill and tap for your M6 screw.  Or possibly fill with that magic compound, JB weld.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

5Back to top Go down   UGH! Stripped fork oil drain plug Empty Re: UGH! Stripped fork oil drain plug Sun Aug 06, 2017 10:49 am

Laitch

Laitch
Life time member
Life time member
zaubertuba wrote:. . . I badly stripped out my fork oil drain plug on my left fork.  Like, reamed it out smooth bad.
These look fun!
http://www.motobrick.com/index.php/topic,580.msg62505.html#msg62505
http://www.motobrick.com/index.php/topic,580.msg63494.html#msg63494


__________________________________________________
1995 K75 90,000 miles
    

Dai

Dai
Life time member
Life time member
6mm Helicoil or take it out to M8. There's enough ally there to accept an M8 but you may need to cut a bolt to length. Putting in a Helicoil really isn't that difficult. The hardest part is ensuring that the tap goes in perpendicular to the hole.

Either way, you have to split the fork. Now, if the damper rod bolt refuses to come out - that's a complete b*st*rd of a job to remove. But there's ways round that too.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

Two Wheels Better

Two Wheels Better
Moderator
Moderator
I used a 6mm Helicoil kit, which was a simple fix, but then had to source a much wider sealing washer to cover the wider-than-the-original-sealing washer's-capacity threaded area. No leaks after 5,000+ kms.


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1977 R75/7-100, 1995 R100 Mystic, 1993 & 1996 K1100RS, 1993 K11/K12 Big Block, 2 x 1998 K1200RS, 2006 K1200R & 2009 K1300GT
    

duck

duck
Life time member
Life time member
You could also use an O-ring to seal it. (Which is what the 4V Ks use.)


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

zaubertuba

zaubertuba
Silver member
Silver member
Thanks for all the tips, guys!  Smile

In the end, I opted for the "longer screw" option and I did indeed get the screw to hold very tight...though I expect I'll have to do something more drastic at the next fork oil change.   Wink

Bike rides great--except a new issue I'll make a separate post for--thanks again!


__________________________________________________
1985 K100RS
    

10Back to top Go down   UGH! Stripped fork oil drain plug Empty Re: UGH! Stripped fork oil drain plug Mon Aug 07, 2017 1:32 pm

Dai

Dai
Life time member
Life time member
Just as long as the new screw is only the depth of the boss on the slider. There's only a mm or so between the inside of that thread and the valve housing ( part no. 9 here: http://www.realoem.com/bmw/enUS/showparts?id=0501-EUR-11-1983-K589-BMW-K_100_83_0501,0511_&diagId=31_0359). I took one set of forks apart where someone had replaced the drain screw and the replacement screw had dug a good gouge into the valve housing. Push it across too far and it will affect the damping.


__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

11Back to top Go down   UGH! Stripped fork oil drain plug Empty Re: UGH! Stripped fork oil drain plug Mon Aug 07, 2017 6:15 pm

blaKey

avatar
Life time member
Life time member
Handy to know Dai.

Thanks.


__________________________________________________
Neil
K100RS 1986 RED!

Dress for the ride and the potential slide.
    

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