Bad Flywheel
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6th Gear
Joined: May 2017
Posts: 12
Likes: 3
From: Tacoma
His thinking is that it's a balance issue causing a vibration that's causes pin hole leaks and hairline cracks in that location of the tank. "Seen it a million times" or something to that effect were his words.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,929
Likes: 8,032
From: poway
Could be something as simple as the tank count was loose.. That will do it also.. If it don't vibrate bad, don't fix it.. Take the motor up to 5500 RPM.. If the balancer is off, you'll feel it tho from what I've seen they are pretty buzy at high RPM..
Road Captain
Joined: Oct 2012
Posts: 520
Likes: 37
From: houston, tx
If it was a vibration issue, you would know it as parts will be breaking off left and right... find another mechanic. Had solid mounts in my touring 96a, broke my horn bracket off, lost a highway peg, lost a shifter bolt and almost my shifter, broke my speakers, bolt holes in the fairing were opening up, broke my radio, chaffed through any wires that were rubbing, etc. Just recently replaced my crank and it spun a little bit and was grinding up the snout inside the cam plate and was working on the oil pump.
Outstanding HDF Member
Joined: Oct 2016
Posts: 2,530
Likes: 546
From: Wayne County, PA
Welding a used gas tank is insane. I personally don't weld on them because the risk. You can technically fill it up with water but there's still a chance. Id look for a new one and check it for cracks when you sand it down.
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Seasoned HDF Member
Joined: Mar 2010
Posts: 21,116
Likes: 7,640
From: Poolville
If it's in the bottom of the tank why couldn't you braze or silver solder it. Both materials flow nicely so you should be able to smooth it out very well... That's they way we used to fix radiators....