material: alu.
4 strokes
bore size: 56.5

Other models: DIO50（bore:39mm）, DJ50(bore:39mm), C50(bore:39mm), MTB-200(bore:39mm), X8-R(bore:39mm), CL50(bore:39mm), SFX50(bore:39mm), kymco50(bore:39mm), GM9(bore:40mm), L50SS(bore:40mm), L50(bore:40mm) LEAD50(bore:40mm), NZ50(bore:40mm), BT50(bore:41mm), T5R50(bore:41mm), CL60(bore:43mm), CB125-T(bore:44mm), kymco60(bore:44mm), GBO(bore:47mm), GBI(bore:47mm), JH70(alu.) (bore:47mm), LJ90(bore:47mm), CF90(bore:47mm), JH90(bore:47mm), C70(bore:47mm), C75(bore:47mm), NH80(bore:48mm), L90(bore:48.5mm), LEAD90(bore:48.5mm), CH100(bore:50mm), WIN100(bore:50mm), JH100(bore:50mm), kymco100(bore:50mm), DY100(bore:50mm), GN5(bore:50mm), JL100(bore:50mm), QJ100(bore:50mm)， C-100(bore:50mm), HONDA-ASTRA (bore:50-56), CD100(bore:50mm), C70(bore:51mm), C100(bore:52mm), CH125(bore:52.4mm),JF03(bore:52.4mm), WH125LE(bore:52.4mm), HONDA110(bore:52.4mm), kymco125(bore:52.4mm), CD110(bore:52.4mm), glx-90/c-90c(bore:53mm), CG125(bore 56.5mm), JH125(bore:56.5mm), CB125(bore:56.5mm), CG125A(bore:56.5mm), WY125(bore:56.5mm), GK125(bore:56.5mm), XF125(bore:56.5mm), TITIAN2000(bore:56.5mm), DY150(bore:57.4mm), kymco150(bore:57.4mm), SY150(bore:58.5mm), CB150(bore:61mm), WY150(bore:61mm), TAK-175(bore:62mm), CG150(bore:62mm), HONDA250(bore: 79mm), ZONGSHEN150(bore:62mm),