I have a 1998 triumph sprint 900cc. It has been running all the time with the temperature gauge just off the C mark. The other day the gauge went to half way when in built up area but dropped down to normal again on the open road when I could get up a bit of speed for the air to do its job, when I slow down or stop the temp goes up again to half way. It never goes past half way and the fan has kicked by then, but if I am stood still and rev the engine the gauge drops to C and back up again to half way when I stop revving. I have checked radiator for coolant and it is full, resevoir is topped up and oil is ok.

Im pretty sure the fan switch on these use a switched earth ,so it's either the fan switch that's faulty and going to earth even when it's cold or there is a part of the wire that goes to the fan from the fan switch that is getting an earth possibly from chafing on the frame.I would suggest disconnecting the fan switch firstly to see if the fan shuts off.

Check that breather pipes are not blocked. There are two pipes that thread through the frame to near the centre stand. Can become blocked with road 'crud'.

Well my old trumpet sounded like a cuttlery draw being emptied into a tin bucket, lol... yes they DO indeed make a racket, however it shouldn't be TOO loud? As long as it sounds rhythmical and even and there are no "Tinny" (like hitting an empty tin) slapping sounds, then you should be all good.

It wouldn't hurt anything though, to give the Valves a good going over, and "set" them again. this will at least give you piece of mind, that nothing is indeed wrong. I have also found that using a synthetic oil that gets/stays? slightly thicker at running temperature, this too, helps quieten it down too. Also check the valve springs, rocker side play too, maybe it needs a shim? sometimes the springs weaken and cause a louder noise, just replace them if this is suspected. Remember though that the Triumph is a "Loose" motor and they do indeed make a racket, often until they heat up and tolerances tighten, and then it should all purrr.....


http://www.repairmanual.com/category/1996-triumph-trident-900/

repair manual above.

the first thing to try is turning the heater upto full heat(a/c off)if the temp guage goes down THEN CHANGE THE THERMOSTAT...(hot oil,if too hot, is thinner than the normal sae rating so the oil pressure will be lower.otherwise no real problem.

http://www.triumph.co.uk/uk/2046.aspx

you can find the code on there web site, if you dealer cant provide it try your local auto paint shop they can match anything with todays technology..

A guess. If you are running on "start" you might not be charging. But then, if you are running on "Start" I would suspect the starter would also be running. You didnt say this was the problem.

Is your battery going dead? Your alternator is putting out? Check the rectifier.

Positive cable
http://stores.shop.ebay.com/PinWall-Cycle-Parts-Inc_Triumph-Sprint_W0QQ_fsubZ12791865QQ_sidZ12458664QQ_trksidZp4634Q2ec0Q2em322


Negative cable

http://stores.shop.ebay.com/PinWall-Cycle-Parts-Inc_Triumph-Sprint_W0QQ_fsubZ12791865QQ_scZ1QQ_sidZ12458664QQ_sopZ2QQ_trksidZp4634Q2ec0Q2em322