Here is a pair of dark green 30 mm tube inserts to extend the rear bumper used with AR4 and other models pre 2004 type birel karts. If you need further explanation be sure to ask in the messages. They are a bargain. Photo one is what you will receive.

If you do know this product please call to be sure this is what you need. It works only on the L&T style clutch

Mrp Motorsport offers full tech support for any of our products offered on this site. As an importer and distributor for Birel since 1998 along with our racing school, we have a wide variety of expertise to offer any karting enthusiast.

Please examine this product closely to insure it is something that you can use. It is better to ask questions in advance than after the purchase.