fuel cap bolts sizes

[agentpineapple]

i'm having a bit of a disagreement with pro bolt over the size of the bolts in the fuel cap, here's what I measured mine as.
4 x m6 x 6.5mm
3 x m4 x 20mm
if checked the ron ayers website, but they only show the 4 x 20mm, a mistake by the ron ayer's website.
pro bolt believe it to be
4 x m5 x 6.5mm
3 x m4 x 20mm
could anyone double check with there fuel cap please.

[E.Marquez]

My 1998 (built june 1997) is all M4

3 M4x21
4 M4x6

[agentpineapple]

cheer mr marquez
but mine are different, mine are from a later model 19ltr tank, not sure that makes any difference.
the longer bolts fit fine and are m4's
but the thread width on the smaller bolts are much bigger, according to a little bolt size indicator that I have, it says they're a m6, you can see by eye that they're bigger.

[bsabloke]

Just measured mine. All m4. 3 are 20mm & 4 are 6mm. Just checking manual & update if required

[agentpineapple]

Just measured mine. All m4. 3 are 20mm & 4 are 6mm. Just checking manual & update if required

cheers rich
marquez and bsa, are your fuel tanks 16 or 19ltrs???
as you can see from my photo, the bolts are clearly different sizes......

[E.Marquez]

Just measured mine. All m4. 3 are 20mm & 4 are 6mm. Just checking manual & update if required

cheers rich
marquez and bsa, are your fuel tanks 16 or 19ltrs???
as you can see from my photo, the bolts are clearly different sizes......

I have a 16l tank (only one offered in the US... dang it)

So the fastener size difference is due to the 19l vs 16l difference , or a model change along the way (Mine being built June 1997, many changes could have happened along the years as supplies / suppliers come and go.)

Clearly you have two different diameter fasteners for your tank..

[agentpineapple]

clearly a different size, very odd, as I say the only thing must be that they changed when they updated the tank size...
i'll contact pro bolt.
whats also odd si that pro bolt admit they should have sent 3 x m4 and 4 x m5, but according to my measurements, the 4 x should be m6. my head hurts

[bsabloke]

16l tank on mine. Your m6 bolts have standard Allen key head. The m4 with the same size Allen key are non standard. What type of finish are you after. I can check with suppliers I know

[agentpineapple]

16l tank on mine. Your m6 bolts have standard Allen key head. The m4 with the same size Allen key are non standard. What type of finish are you after. I can check with suppliers I know

i'm only being a tart with some black alloy bolts, so thanks for the offer dude, but i'll get pro bolt to sort it out, its interesting that we might have found out another difference between late and early model bikes....?

[lloydie]

It's you filler cap ring that's different not the tank .
I'm after a normal set of m4 when you guys find them at a sensible price :-)

[agentpineapple]

It's you filler cap ring that's different not the tank .
I'm after a normal set of m4 when you guys find them at a sensible price :-)

on both bikes???

[lloydie]

No just the one :-)

[agentpineapple]

No just the one :-)

both my tanks are 19ltr's and the bolts are the same, but being the div that I am, I've just remembered the black 16ltr tank in the garden, tomorrow I will check to see if the bolts are different on that one......doh!!!!

[lloydie]

I'll check mine too just to make sure