Swaptrex,
Subrina and I have been riding in Jamaica for years.
The route you are looking at is a great one.
After you past the Westender Inn and head up the hill, you will come to a right turn that leads to the Blue Hole. If you do not make this right turn, you will end up back at the gas station on the Negril to Sav road. If you continue on past the Blue Hole you will come to Brighton. You can continue along the coast to Likkle Bay. From there you can take the road to Likkle London. On that road you will pass Jamwest race track. We have actually run our bike down the dragstrip before. Just ask anyone for directions if you get off track. The pics below are from that area. We would pack a cooler full of Red Stripes and hit the road. This area is great for riding Let me know if you need any more info or advise.as there is not much traffic and the dirt bikes make the rough roads easy.