Petrol cap splash guard in alloy

What will sit between the lip of the tank and the lip of the splash guard? "O" ring or rubber washer?

Just trying to figure out how much space it will take up and what adjustment will be require to the tank cap.
 
I was planning on using a thin O ring, will get a chance to do some further road testing this sunday.  Ran it in the 3C last sunday with no O ring at all.  Didn't splash out.

Cheers

Marty
 
Hey, I'll take one of these to try on my Guzzi too.. It throws so much petrol out I'm sure one day it's going to blow.. The looks I get in petrol stations when I leave half the tank on the floor isn't funny.. I was even thinking of drilling a teeny pilot type hole in there somewhere to bleed out the vapor lock.. Can't be that complicated a problem...

Let's throw it at Lothar to analyse it to death (actually, everything he said in the thread concerning the position of the fuel pipes and carb filling was 100% correct.. He knows his stuff)

L8rs
 
Marty, its always good to see enthusiasts taking the trouble to improve our bikes and fill the gaps when spares become thin on the ground.  Thanks for doing just that.  With all due respect, I would like to ask a question.  Wouldn't this piece be better made in carbon fiber?  Machining the alloy is time consuming and expensive.
 
If it works and will fit a 1982 Jota 120 tank them I'll have one too. PM me with payment details please. It won't be much good to me if the hole is too small and it rattles around riding on bumpy roads.  :o

I've had a plastic insert in the tank for years but with the insert hardening with age and my diminishing eyesight, any slight misalignment of the fuel filler spout pushes the damn thing inside the tank. Both of us are thus deemed pretty useless.

Thanks

DoC! 
 
May I suggest some slight modification, please?

a) I would do a hole into the bottom of the splash guard, just as big as the petrol filler from the gas station is. Else the thing will swim up when tank is full and you will get problems to close the tank. the splash guard is long enough to keep the fuel from swapping around and spitting through the tank filler cap.

b) I would do a bigger hole on the side, like 3-4 mm. Looks like a 1mm hole, which is to thin to drain the air fast enough when you fill the tank. Else you need to take it out any time you fill the tank, which might cause fuel-drops to get onto the tank etc. or will leave you with the "where do I put it while I fuel up the bike" issue.

else: looks good  ;)
 
Hi Lothar,

You need to take it out when you fill up, put it on the bowser next to your gloves, so you don't forget it.  Sorry progress is very slow, I've been crook as rookwood with the flu, and so has my mate Col who is machining them up, should have them done in a week or 2, will be in touch then.

Ps, Rookwood is the name of the big cemetry here in Sydney

Cheers

Marty
 
Maaate, if I buy one first thing I would do is whack a holesaw through that base and then find a fuel proof washer to sit between it and the tank. You try to push that sucker into a full tank too fast and you would end up with a fair amount of fuel coming out over the top of the tank and dripping onto a hot engine.
 
I have always had this problem. The rubber funnels will harden and shrink. i suspect it is worse here in the USA, sepecially in California because of the gas they make us buy. I have taken a stock gas cap with an "inner" seal and doubled up the rubber seal. This helped a lot.

Marty, I would also like one of the new funnels. Please let me know how much in US dollars and where to send it.
Thanks, Myke
 
Wolfgang sold me a rubber insert that was dome shaped instead of tubular. This did not harden with age. I sold that bike but I would imagine it is still doing sterling service.
 
You must log in or register to reply here.
Back
Top