Fuel cap opening (pita while refueling)

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Sixty7 · #1 Post by **Sixty7** » Thu Jun 25, 2015 4:28 pm

Hi has anyone on here widened the fuel cap opening as it's a pita when filling the tank up.....takes ages and sometimes splashes out while trying to view in to check the level.....I did find one or two threads on Aprilia forum.....just one question as I'll only be taking the bottom bit of plastic off.....I'm assuming u still keep the fuel level below that point..???

Dalemac · #2 Post by **Dalemac** » Thu Jun 25, 2015 7:06 pm

Remove the petrol cap (only 3 of the allen bolts how it to the tank, the others dont), cut away whatever plastic you deem to be getting in the way, give it a good clean and replace.

I don't think there is an overflow on the falco, unless excess petrol can flow down the breather tubes?

D-Rider · #3 Post by **D-Rider** » Thu Jun 25, 2015 9:35 pm

I have wondered about this - I thought i might just drill some holes near the top of the plastic bit to let the air escape when filling above the bottom of the plastic bit.

Not going to bother now - I'll see what the cap's like when I get a new one for the carbon tank. Hopefully that will not have the same constraints as the standard filler.

Dalemac wrote: I don't think there is an overflow on the falco,

Oh yes there is.

Dalemac · #4 Post by **Dalemac** » Fri Jun 26, 2015 6:27 am

D-Rider wrote:I have wondered about this - I thought i might just drill some holes near the top of the plastic bit to let the air escape when filling above the bottom of the plastic bit.

Not going to bother now - I'll see what the cap's like when I get a new one for the carbon tank. Hopefully that will not have the same constraints as the standard filler.

Dalemac wrote: I don't think there is an overflow on the falco,
Oh yes there is.

Would you care to point it out Andy? Not saying you are wrong but I just can't see the overflow.

I had the petrol cap off of mine last week to clean it. There are two plastic tubes at the top of the tank (which the petrol cap screws into), that run down into the fuel pump. On the underside of the tank, these connect to the two breather hoses, which eventually run down to the clutch slave.

There is no other obvious overflow that I can see, unless fuel can travel down these breather hoses?

D-Rider · #5 Post by **D-Rider** » Fri Jun 26, 2015 8:40 am

The tubes inside don't run to the fuel pump itself but exit through the base into hoses that go down to near the clutch slave. These act as overflow / water drain channels (if they're not blocked).

Dalemac · #6 Post by **Dalemac** » Fri Jun 26, 2015 9:03 am

Cool, cheers!

Falcopops · #7 Post by **Falcopops** » Fri Jun 26, 2015 9:33 am

This is something that I've had in the back of my mind for a long time, but never bothered to do.

Yet every time I'm trying to squeeze that last quarter litre into the tank grumble about my inaction.

I reckon that you can cut off the chamfered part above the existing hole without causing any drama. The cap will still seal and the overflow and breathers will be unaffected.

One day!

MartDude · #8 Post by **MartDude** » Sat Jun 27, 2015 9:13 am

Related - I don't understand why bike manufacturers, and Aprilia in particular, don't/haven't used the filler cap arrangement of the Futura - it's off-centre, so it's at the highest point when the bike's on its side stand; makes filling to the brim so much easier.

D-Rider · #9 Post by **D-Rider** » Sat Jun 27, 2015 9:22 am

MartDude wrote:Related - I don't understand why bike manufacturers, and Aprilia in particular, don't/haven't used the filler cap arrangement of the Futura - it's off-centre, so it's at the highest point when the bike's on it's side stand; makes filling to the brim so much easier.

Oh the irony when the Futura is the one to which they choose to fit a centre stand !