At 5 months, ang tyan mo dapat medyo visible na pero hindi pa super laki, parang may bola lang na lumalaki gradually, so normal lang yan! On the motor bike naman, honestly alam ko maraming pregnant moms na nag-ride pa rin, pero sa 33 weeks kaya na? I'd say mas safe kung hindi na, lalo na kung mahabang biyahe or may traffic, ang vibration and bumps talaga ang nakakaalala sa amin, plus ang balance mo na ay balanse na at prone ka sa falls, which is scary at that stage. Better check with your OB para sure, kasi every pregnancy is different and she knows your specific situation best!