This is a new PRO-X Piston Kit. STANDARD 'B' Fits the cylinder bore 54.00mm.  New piston kit, old stock.
 A qualified machine shop is required to measure your cylinder for proper clearance and wear.
Check your bore size before purchasing. 
Fits: SUZUKI RM-125 2004-11,  2-Stroke.

Year and Model are important, check yours before purchasing.  This 2004-11 year model RM-125 is a flat top, single ring piston. 
Reference Help: 2004-11 RM125 models have 36F, 36F1 embossed on the cylinder.

The kit is supplied with piston, single ring and clips and pin.
Keep your vintage RM-125 running with this piston kit.

You will receive 1 each piston kit when you order.

Note : Picture is not exact model, you will receive correct kit when ordering.