Tire Valve Core Replacement Choices

[Byron]

I couldn't find any reference to motorcycles with regard to the core but I did find this; "There are two types of cores used for passenger valve stems; with the main difference being the temperature rating. A standard valve core usually has a black seal with a temperature range of between -65°F (-54°C) and 225°F (107°C). The high temperature core usually has a red seal and has a temperature range of -65°F (-54°C) and 250°F (121°C) and is designed more for use in truck applications."

I've probably used both with no noticeable difference.

 

[DeanR]

There are two types of cores used for passenger valve stems; with the main difference being the temperature rating. A standard valve core usually has a black seal with a temperature range of between -65°F (-54°C) and 225°F (107°C). The high temperature core usually has a red seal and has a temperature range of -65°F (-54°C) and 250°F (121°C)

Similar to what I have heard (post 9). Now I know a possible reason.

 

[MajorTom]

Do motorcycle tires require any special valve cores?
Or, are there any recommended cores for a 90 degree valve stem?
The ones in my wheels are not playing nice with my tire inflator.
I think they may be too short.

I have aluminum 90 degree valve stems I bought from a Yamaha dealer in Palm Springs when on vacation there a few years ago. I have had no problem with the rear valve stem, but the valve core seems to be deeper in the front one and only some inflators and pressure testers depress the core enough to open it. And this fall, maybe because I've been forcing the tools down on the stem so hard, I seem to have chipped the edge of the opening and can't get a clean seal anymore. I'm going to try a gentle filing to see if I can square it off until my next front tire change when I can install a replacement.

 

[Byron]

Similar to what I have heard (post 9). Now I know a possible reason.

No, in post 9 he is talking about the mounting hole size for the valve stem itself, not the core/valve piece inside.