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'78 GS750 Gas Tank Leak
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'78 GS750 Gas Tank Leak
Oh wise men of old, hear my cry! Recently found my tank dripping gas and after some investigating, it seems gas is seeping out of the circled area, in between the tank and the tab where the tank sits against the rubber mounts. It's not a fast leak, held it so the gas would pool in that area and it moistened after about 30 seconds, no dripping though. I bought some Seal All to try and fix the leak, but not sure if it would be better to somehow re-weld the tab back on? I was looking through the threads here and saw Wingman's post on resealing the tank, considered that option as well (Linking here for reference). I figured I wasn't the first person to ever run into this specific problem and ask here, picture attached as well. Thank you for your time!
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A tank liner would be the easiest fix.
I've used the POR15 motorcycle tank liner kit a few times and they are good value and work really well.
POR-15's Motorcycle Fuel Tank Repair Kit has everything you need to seal your bike tank and protect from rust, corrosion, and seal pinhole leaks. Order now!
The only issue I found was flash rusting after the etch and rinse, use isopropyl alcohol after the rinse and pour 2-3 litres (2-3 quarts) into the tank, swish around and then dump it out and then dry it with a heat gun.
When you pour in the liner, allow at least 1 - 1.5 hour for this step, keep rotating the tank to ensure you get everything inside coated, after it starts to get a little thicker, pour out the extra and keep rotating it so as to not get any pooling in the bottom., stay with it until nothing is moving around and you are done.
Check out a few youtube videos on the topic for more detailed instructions if needed.
Good luck,
David.2018 Honda Africa Twin AS
2013 DR 650 Grey, sold 1981 GS 650E Silver,
1980 GS1000ST Blue & White, X2
2012 DL650 Vstrom Foxy Orange, in storage
1981 CT110 X2 "Postie Bikes" Gone to a New Home.
2002 BMW 1150 GS Blue & White - Sold
1975 BMW R90/6 Black - Sold 1984 GS1150EF Sold
1982 BMW R100 Africa trip, Stolen - Recovered- Sold
1977-1980 Suzuki GS550, GS1000E, GS1000S GSX750, GSX1100,s
Hondas ST90, CR125 CB175 , CB350 CB750, NSU Quickly, Yamaha RD's 350/400,
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Actually, find someone that knowns how to repair tanks. The way it's done correctly it to get a hot iron and solder the hole closed... Also, if there's a hole, lining the tank won't last.Current:
1993 ZX11 - 2nd build in progress
1977 GS750 (710 is getting closer)
1998 Kawasaki Voyager - selling
1998 Chevy C2500
1999 Rav4
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Epoxy on the outside and por15 on the inside has held up on my old gs1000 and that tank was leaking from about 5 different spots.2002 bmw r1150gs 1978 gs1000E skunk les pew 1979 gs1000L dragbike
82 gs1100L probably the next project
1980 gs1000G the ugly 1978 gs750E need any parts?
https://m.youtube.com/watch?v=m_m2oYJkx1A
1978 gs1000E skunk #2 RLAP
https://live.staticflickr.com/65535/...2f1debec_t.jpg
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I had exactly the same problem with my gs1000 tank, it was only a slight weep. I dried out the tank to get the fuel vapours out. Then cleaned the area around mountings and soldered it up, the tank needed re paint anyway. Been fine for years now.
20181123_194537 by Dennis Harland, on FlickrMy bikes 79 GS1000 1085 checked and approved by stator the GSR mascot :eagerness: and 77 GS750 with 850 top end, GS850g, and my eldest sons 78 GS550, youngest sons GS125. Project bike 79 GS1000N
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