Carburettors


Carburettors

During the 2013 Polar Ice Ride, I had a 220V – 100W resistance wire winded around the carburettors to pre-heat them. Roughly half an hour before starting the bike I connected the wire to the power, delivered by an aggregate. To get as much as possible from the generated heat into the carburettors I had the whole unit -including the resistance wire- covered with a layer of aluminium tape. This combination turned out to work very effectively. It really made a huge difference! That’s why I will use the resistance wire, which was given to me by Ride-on MotorTours, also during the North Pole Adventure.
Extreme cold requires a different carburation, namely with more fuel. That’s why Yamaha uses jets from 150 instead of 130 in their 4-stroke powered snowmobiles, which are fitted with virtually the same engines as the R1’s. In 2013 I coincidentally discovered this knowledge while I was searching for a cause for the far to light colouring spark plugs. That indicates a lean combustion, which eventually could cause damage to the cylinder head and valves. Luckily those 150 size (snowmobile)jets were available in Barrow at the time. During the North Pole Ride I will mount them in the carburettors beforehand. By the way, those bigger jets will give you problems high up in the mountains, because of the lack of oxygen. But there’s no need to worry about that on the polar cap. 😉