Join Date: Nov 2009
Location: Lander, Wyoming
The 16160-1359 is the filter body Before the heaters. The 49019-1068 Cleanable/Replaceable Coolant Filter slips inside of the body.
Take notice of a "gap" between a pair of hose clamps, possible part # 92170(A)-1863. This would be where the 'T' shaped carb heater 92005-1235 fitting is connected.
The 49116-1081 metal shelled thermostat body is placed After the carb heaters. And I can only suggest that its operational control is Ambient air temp or engine compartment air temp (fairings on R6), because of its downstream placement.
Modify at "YOUR OWN RISK"!
Still riding my 1987 KL650-A1. 85,000+ miles & counting