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K100-forum.com » Technical, repair and troubleshooting » Frame, fairing and wheels » Tank Caught the Mumps?

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1Back to top Go down   Tank Caught the Mumps? Empty Tank Caught the Mumps? Tue Jan 30, 2024 9:30 pm

tjh1985

tjh1985
Silver member
Silver member
I have a spare tank from a K1100 parts bike I purchased and have no idea what they are, what they're from or how the best way to make them go away. Has anyone seen this before and could enlighten me?

See Picture - bumbs on both sides of tank in the same general area, but there are on or two in other random areas alsoTank Caught the Mumps? Img_8510

http://www.thomashurst.com
    

2Back to top Go down   Tank Caught the Mumps? Empty Re: Tank Caught the Mumps? Wed Jan 31, 2024 12:42 am

Dai

Dai
Life time member
Life time member
Stick a pin in one of them - looks like paint contamination to me.


__________________________________________________
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
    

3Back to top Go down   Tank Caught the Mumps? Empty Re: Tank Caught the Mumps? Wed Jan 31, 2024 2:17 am

92KK 84WW Olaf

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Life time member
Life time member
They look like paint contamination to me too, but its possible the tank was stored invertted with water in it and corrosion has resulted. I have two tanks that have done that on the underside and they also looked like that.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011157 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 58,200 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 51,800 miles.
1983 K100RS 0004449 Odette R100 colours 58,000 miles. Sprint fairing now 63,390 miles

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

4Back to top Go down   Tank Caught the Mumps? Empty Airbubble Under Paint Wed Jan 31, 2024 3:17 pm

tjh1985

tjh1985
Silver member
Silver member
You were right - some type of air bubble under the paint. Opened one up and pressed it flat - doesn't look any better, but at least I understand the problem.

As always, much appreciated!

Thomas

http://www.thomashurst.com
    

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