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fibreglass tank

fibreglass tank

Postby chrisf1 » Thu Sep 22, 2016 12:57 pm

Hi again everyone I have recently had my fibreglass tank sealed and painted but still seem to be getting carb problems and they are both new any suggestions as I really would like to keep this now very expensive tank
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Re: fibreglass tank

Postby grandpaul » Thu Sep 22, 2016 1:01 pm

You'll have to detail and describe what's been done on the carbs, and what they're doing now...
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Re: fibreglass tank

Postby chrisf1 » Thu Sep 22, 2016 1:59 pm

The carbs are both brand new, the problems are misfiring and bad uneven running, clean carbs will run fine for a day, the next problems again

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Re: fibreglass tank

Postby grandpaul » Thu Sep 22, 2016 2:31 pm

You still have trash in your tank, and probably clogging petcocks...
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Re: fibreglass tank

Postby Bernhard » Fri Sep 23, 2016 6:15 am

Depends who made the tank and if they used petrol proof grade fibre glass liquid and hardener when made.

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Re: fibreglass tank

Postby Triton Thrasher » Sat Sep 24, 2016 9:02 am

If your tank is melting into the carbs and engine, you can't use it. Very sorry and all that. Get a metal tank.

Those tea strainers over the carb inlets don't filter the air and will be seriously restrictive at speed, making the mixture too rich.

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Re: fibreglass tank

Postby Fast Eddie » Sat Sep 24, 2016 9:54 am

Is it an old 60's original tank or a modern repro?

I had an original 60s job that looked just like that. The material was incredibly thick, but it was made out of strange stuff, it looked like it had chalk in it! Even before the dreaded ethonal, paint bubbled up as petrol are through it!

Maybe the liner material you used was not good? Maybe it has not covered properly?

Your tank melting into the fuel certainly seems like you're most likely issue.

And TT is totally right about those tea strainers BTW...
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Re: fibreglass tank

Postby chrisf1 » Tue Sep 27, 2016 11:38 am

It is an old tank which I thought I had sealed successfully but obviously not, so I imagine this tank that I like the look of so much is now very expensive dustbin material and I need to go for an alloy one does anyone know if they are available with bolt on fittings for a slimline frame otherwise I will have to move the rear cross strut to accommodate the strap for the tank top any suggestions gratefully received Chris

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Re: fibreglass tank

Postby chrisf1 » Thu Oct 20, 2016 11:59 am

Hi again everyone the problem is now solved the new carbs were wassell I have now changed them for amal and all the problems have gone

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Re: fibreglass tank

Postby Fast Eddie » Fri Oct 21, 2016 1:26 pm

chrisf1 wrote:Hi again everyone the problem is now solved the new carbs were wassell I have now changed them for amal and all the problems have gone


So the tank is OK?
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Re: fibreglass tank

Postby chrisf1 » Fri Oct 21, 2016 11:43 pm

It appears so, the quality of the stuff produced today and sold for good money leaves a lot to be desired

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Re: fibreglass tank

Postby Fast Eddie » Sun Oct 23, 2016 4:38 am

Good show, at least you're sorted.

Now to give it a sound thrashing !!
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Re: fibreglass tank

Postby chrisf1 » Mon Dec 05, 2016 8:16 am

Triton Thrasher wrote:If your tank is melting into the carbs and engine, you can't use it. Very sorry and all that. Get a metal tank.

Those tea strainers over the carb inlets don't filter the air and will be seriously restrictive at speed, making the mixture too rich.


The tea strainers are to stop the induction of small children while passing

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Re: fibreglass tank

Postby Fast Eddie » Mon Dec 05, 2016 11:26 am

chrisf1 wrote:
Triton Thrasher wrote:If your tank is melting into the carbs and engine, you can't use it. Very sorry and all that. Get a metal tank.

Those tea strainers over the carb inlets don't filter the air and will be seriously restrictive at speed, making the mixture too rich.


The tea strainers are to stop the induction of small children while passing


I think we understand that.

The trouble is, they really do screw up the intake. And on top of that, whilst they may filter out small children, they do allow in vast quantities of particles intent on eroding your engine!

If that does not bother you, you are far better off with decent, open, velocity stacks.

If it does bother you, you are far better off with a K&N type, or Pipercross foam type filter.

Either way, Tea strainers neither flow well or filter well, and thus, do not belong!
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Re: fibreglass tank

Postby Johnnymac » Sat Feb 25, 2017 9:20 am

I hate to say it but if it's the tank...and it still might be, your new carbs will eventually clog up.
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