Ay, honestly mama, 8 months pregnant on a motorcycle is really risky kahit slow lang, the bumps and vibrations can affect baby, plus ang balance mo ay off na talaga at that stage kaya mas prone ka mag-fall. I'd seriously suggest asking your OB about this one because every pregnancy is different, pero most doctors would advise against it, especially if may alternatives ka na. A few of my mum friends tried riding late pregnancy and regretted it, mas safe talaga mag-Grab or mag-sakay sa sasakyan na less bumpy. Better safe than sorry, no?