Ok, here's a question which i am sure won't take too much to answer... :D
I'm living and working in Bangkok Thailand and have a NC30, the bike is well looked after but given the heat here (35-40 degrees) the bikes normal operating temp is around 90-105 degrees.
I don't have any issues with loss of power or hot starting, all is fine in that department.
The cooling system has been bled correctly, i have a larger alloy upper rad and the radiator cap seals fine.

Is 105 degrees some thing i should be concerned about, or just continue enjoying the bike as i have been for the past 2 months?

Many thanks, Karl :)

105 is fine. I've seen even my CBR get to 110 here in Northern Ireland. As long as you can get the bike to stretch its legs a little to help cool the bike down then it'll be fine. The rest of the things you have down are good. A decent radiator, fresh coolant and a properly bled system is the only way to keep things cool.

It is possible to have an On/Off switch for a fan as well, but it's not necessary.

Yep have an on/off switch, which is switched on at all times :D
I'm thinking of maybe placing a fan on the upper rad too.
I understand it's not really needed when moving, if anything it may reduce the rate of flow, but in stationary traffic it would be a benefit :)

Whats the point of an on/off switch when there is already a thermostat built into the coolant system ?

Old Painless wrote:Whats the point of an on/off switch when there is already a thermostat built into the coolant system ?

I see your point Old Painless, i guess it's more for peace of mind, I'd rather have the fan running permanently, instead or relying on 18 year old electrics, sticky thermostats and dodgy temperature senders.
Esp over here in Thailand where if the fan wasn't to come on, the engine could really heat up quickly in the rush hour traffic.

Just my 2p, Karl :)

karl BKK wrote:I'd rather have the fan running permanently, instead or relying on 18 year old electrics, sticky thermostats and dodgy temperature senders.

Your temps sound normal for a little V4 in the summer heat. Just avoid traffic if you can

Just manged to get the operating temps lower.....
Found there was a very slight leak on one of the lower rad hoses, the leak was on the underside of the hose and so slow that the water would evaporate before dripping and becoming noticeable.
For the past 3 days and a long country road blast, the Temps remained below 100 degrees, mostly around 90-95 degrees, which isn't bad considering the traffic i would occasionally get caught up in and the Thai heat. :)