Go towww.bajamotorsports.net for complete owners manual.
Castroil
http://jleibovitch.tripod.com/id247.htm
The Baja Heat mini bike has a 200cc 6.5 Hp size engine.
The Baja Warrior mini bike, equipped with a 196cc engine, can reach a top speed of approximately 30 to 35 miles per hour. Factors such as rider weight, terrain, and overall bike condition can affect this speed. It's designed for off-road use, making it suitable for trails and recreational riding. Always ensure safety gear is worn while riding.
Homelite
A 2.8 = 97cc
gas
robertson, the one you want is the 6.5 hp Honda clone pipe here is a link to their site:http://www.robertsonstorquetubes.com/
It's not easy to do.
monsterscooter parts has them on the internet for $42
Buy a new one.
To way to fix that ... eiter change the oil or your ckoke may be broken I have the same bike and that was the way i fixed it.