Voge coolant: checking the level and topping up
Where the coolant level is read on a Voge, the three conditions the reading requires, the situation in which the manual forbids topping up, and what a falling level indicates.
The coolant check is among the shortest items in the maintenance plan and among the most frequently performed incorrectly, because the reading depends on three conditions that are easy to overlook.
Where the level is read
Both the check and the top-up take place at the expansion tank rather than the radiator cap. The level must sit between the LOWER and UPPER marks.
The three conditions
Engine off. Engine cold. Motorcycle upright.
Coolant expands as it warms, so a level read hot reads high and the system is consequently underfilled. A motorcycle on its side stand reads incorrectly in the opposite direction. The centre stand or a paddock stand is used.
Topping up
Coolant is added through the expansion tank filler, to the middle of the range.
Overfilling is to be avoided. Above the UPPER mark, coolant is forced out of the overflow as it warms, and the manual specifically warns of the scalding risk this presents.
The situation in which topping up is not appropriate
Where the expansion tank is completely dry, it should not be refilled by the owner. The manual is explicit on this point. A tank that has run dry indicates that air has entered the cooling system, and air must be bled out. Topping up leaves an air lock, which will overheat the engine again and with less warning than the first occasion.
A repeatedly falling level indicates a fault
Coolant is not consumed in normal operation. Where the level continues to fall there is either a leak or a path into somewhere it should not reach:
- Visible beneath the motorcycle: a hose, the pump seal or the radiator.
- Not visible anywhere: a head gasket. The associated signs are white exhaust smoke and an emulsion on the underside of the oil filler cap.
In both cases the manual directs the owner to a dealer rather than to continued topping up.
Capacities
Coolant capacity for each model is listed in engine oil grades, capacities and coolant volumes. The DS900X takes 2.0 litres, the DS800X Rally 1.75 and the DS525X 1.5.
Related pages
The warning light and the action it calls for are covered in coolant temperature warning, and an overheating report on the 650DSX in 650DSX overheating.
Source
- Voge DS900X owner manual (EN edition), coolant chapter
Information only, not official Voge documentation. Verify every figure in the official manual for your exact model and model year before you work on the bike.
Related reading
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What to check before buying a second-hand Voge: papers and service stamps against the factory schedule, recalls, a cold start, chain, brakes, tyres and steering, and the known weak points of each model.
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Original Voge part numbers for the service parts of the 300DS, 500DS, FR150, DS900X, SR3, CU525 and SR4 Max, taken from the official parts catalogues, how to read a Voge part number, and why aftermarket cross-references need care.
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