COOLING/HEATING

The air should automatically purge from the radiator through the recovery tank unless the system is dangerously low on coolant. Are you filling the cooling system through the radiator cap or the recovery tank? You should be filling while cold in the radiator. On a cold engine, remove the radiator cap. Insure the radiator is 100% full. If it isn't then fill with a 50/50 mix until full. LEAVE the CAP OFF and start the engine. Once it warms up, the thermostat will open and the radiator coolant level will drop. This will purge most of the air, then fill to capacity again and REPLACE the CAP. The water pump will circulate coolant SUCCESSFULLY only when the system is filled properly; sounds like yours isn't. When the coolant is low, a steady stream of coolant will not circulate through the heater core. Once the coolant in the core cools, you no longer have heat.

also, make sure that the heater core isn't clogged or leaking neither.

If the core had blockage, it would overflow from the surge tank. If the core had failed, it would leak into the passengers compartment. He didn't mention EITHER of those symptoms. You're creating extra effort.

I have a question were is it located on the bike ? my man owns the motor cycle its a 1980s Honda civic cb650 I think. its smoking white smoke out of the exhaust. it just happened yesterday and we did an oil change today. he says there no coolant thing on his motor cycle but when he drained some where on his bike.... green or some other sweat smelling stuff came out. if there isn't than maybe he has to rich of and air flow for his bike ? my question is were if have, would the coolant tank or place be on his motor cycle??