Rear Heater Hoses - Definitive Size?

[bicycleagent003]

Hey Mudders,

I am replacing my firewall heater hoses and the threads I've read have left me wondering whether the hoses which go back to the rear heater, and the hoses by the cats, are 1/2" or 9/16" ID?

I'm replacing my non- formed hoses with Gates Green Stripe, if that matters.

Thanks,
Russ

 

[cruiserdan]

13MM.

 

[Whileemptyheadsdream]

One Half

 

[AJP]

slightly bigger than 1/2 ... see Dan's note!

 

[TDavidson]

Try to get 13 mm if you can. Tell me where you sourced it if you do. It is so much easier to install. Just like the PHH. Those who use OEM sizes don't complain so much.