Caswell liner failure

teamWicked

Amatuer
Top Contributor
Messages
1,726
Reaction score
7,855
Points
513
Location
Sheboygan, WI
I’m going to probe around that tank a little more tomorrow. Try and get a better look at the rest if it.
Flash lights are bulky, these should reach.
upload_2021-11-23_18-23-48.png
 

Jim

Beyond the edge is the unknown. Here be Dragons
Top Contributor
XS650.com Supporter
Messages
11,455
Reaction score
43,562
Points
813
Location
Kansas City Mo.
If you go the MEK route, take care what you buy. Most sold today are actually MEK "substitute." The substitute is usually in the fine print. It ain't near as powerful a solvent as the pure stuff.
The Sunnyside Gary referenced above is the real stuff. I haven't ran across any other brand that is though.... that I recall anyway.
Caveat emptor.
 

GLJ

Never go faster than your guardian angle can fly.
Top Contributor
Messages
3,158
Reaction score
13,214
Points
513
Location
Dixon IL USA
He’s located 2hrs away. I certainly do not think this was negligence on his part by any means. As a reminder, I did not pay him to paint it. I bought it on eBay from the person that did. This was sealed 9-10 years ago. I’m sure a lot has changed over that time. Fuel chemistry, sealer chemistry… etc.
I understand he did not do it for you. He may or may not be aware of problems with liners he did in the past. I know if I was professionally doing liners I would want to know how they are holding up.
Plus he is probably more familiar with the liner than any 10 people here.
 

GLJ

Never go faster than your guardian angle can fly.
Top Contributor
Messages
3,158
Reaction score
13,214
Points
513
Location
Dixon IL USA
Yeah when I contacted Marbles Motors and showed them what happened to the liner they installed, Marbles Motors denied doing the job. The conversation only went down hill from there. :cautious:
Hopefully not everyone is like Marble Motors.
You never know until you talk to them.
 

cra-z1

XS650 Guru
Top Contributor
Messages
1,085
Reaction score
1,703
Points
163
Location
CDA ,Idaho
One thing I have heard about Caswell is that in climates that see large temp swings it can crack. Or at least that has been the explanation. Tank expands in summer and shrinks in winter, especially if you storing it in an unheated building. Im assuming the epoxy is not flexible enough. Nice looking bike by the way.
 

willis

xsive compulsive disorder
Top Contributor
XS650.com Supporter
Messages
1,845
Reaction score
4,343
Points
263
Location
Northern Indiana
After a little fishing in the tank today, here is what I got out.
AFC92843-BF58-4E78-9AAD-95718F2F2DA0.jpeg

It is very brittle. Some pieces are paper thin. The vast majority came from the front right side of the tank. It’s hard to see inside very well. At least I have plenty to experiment with when testing solvents.
 

gggGary

Simplest truths meet the sternest resistance F D
Top Contributor
XS650.com Supporter
Messages
26,489
Reaction score
39,896
Points
813
Location
Baraboo, WI, USA
I'll throw these in here.
This fiberglass tank lived in a garage in Florida it's entire life. A lining was applied after the fiberglass started to sweat gasoline. When the lining failed the bike was parked. There was resin throughout the fuel system, the carb slide was stuck tight.
DSCN3899.JPG

upload_2021-11-26_16-37-57.jpeg
 
Last edited:

teamWicked

Amatuer
Top Contributor
Messages
1,726
Reaction score
7,855
Points
513
Location
Sheboygan, WI
There are alot of effective solvents you can mix with your gas. STP, Bardahl, Seafoam, etc carb cleaner, fuel injection cleaner, fuel system cleaner are all pretty much just naptha, kerosene and isopropyl alcohol. The kerosene and naptha have the same btu/liter energy content. I use only naptha in lawn mower, snowblower and outboard for varnish removal, 3 oz / gallon. Naptha is cheap at $9/qt compared to $6/ 1/2 pint for STP et al. Point being, MEK or other solvents can be added to you fuel to dissolve deposits if you are still running pretty good. That lawnmower/snowblower surging you get with clogged jets dissappear in 1/2 a tank of fuel. These solvents probably have a lower octane rating (octane is an 8 carbon chain and these solvents are 3 or 4 carbon chain, I didn't check) but a few ounces in your 91 octane is not going to be a detonation issue with a reasonable C/R. If you suspect that the liner is coming apart and going to your carbs this might help. If you have used these additives and your liner is failing, this might be the cause.
 
Last edited:
Top