Topic: 5/16" barb petcock on CB550?

[tacc13]

Are there any problems fitting 5.5mm ID fuel pipes to the 5/16" barbs on the Pingel or Golan petcocks? I've got 3/8" NPT bungs on my tank so am planning on using one of these suppliers. If it's an issue would the petcocks with a 6AN male outlet mated to a female 6AN to 1/4" barb fitting (https://www.anhosefittings.com/straight-push-lock-barbed-an-hose-end-fitting-6an-1-4.html) be a better solution? Thanks.

[Bodi]

5/16" is just under 8mm ... you might stretch and force a 5.5mm hose on there but you risk it splitting and falling off from overstretching (naturally, it will split and spout fuel at the worst possible time). Even 1/4" at 6.4mm is a stretch but not as risky. The other way - fitting 1/4" hose on a 5.5mm nipple - is not too good and needs a tight hose clamp to not leak.

[kerryb]

If a hose to hose adapter isn't already available, I would be surprised...and willing to make you one out of aluminum.  But don't wait long, I'll be away from my lathe soon, untill march.

[kerryb]

Like this?

[tacc13]

Big thanks to Kerry for taking the time to machine me some reducers.  Hopefully the first of my fuel taps arrives soon. I might have to bring the bike inside as the garage is not useable because of smoke and dust from the fires