Bill,
Wranglers is behind Big C at Sukumvit. Siam Racing is still open and I don}t know about closing downs but it is situated on Sukumvit near the Bangkok Pattaya Hospital opposite Mini Siam. Anyhow they only have Thai helmets at a premium price.Japaneese helmets are difficult to find in Pattaya. Mx gloves in a wide selection can be found at Siam Off road on Siam Country Club. It is a very special shop so it is worth a visit. It is a little difficult to find but follow Siam Country Club road pass the butterfly Bar signs and you will see a new big house with a very clean offroad shop in the floor level.
HIKO