Cycling and horse riding

BIKE INFO PLEASE:
Does anyone know what long-distance cycling is like in Malaysia? The guidebooks say it's good,yet an expat wrote said roads are bad and traffic dreadful. Planning to come to live in a couple of weeks. Want to cycle KL to Singapore. Sabah, Brunei,Sarawak.
Is it relatively safe for a lone woman?
Are bike repairs/parts easily available?
Would like a reply asap if possible,or a contact person who can maybe help.
Is there a place to horse ride?
Thanks everyone!

well i love horse riding too . n will be looking for it when i will come there next month