Steven
10-05-2003, 08:32 PM
My TRX440EX has been getting hot!
I first noticed this when i started letting novice guests ride my bike. At first I couldn't understand it.
When I rode the bike, oil temperature stayed between 220 and 250 degrees. Everytime I let someone else ride it, oil temp would shoot to over 300 degrees????
After time, I discovered that when the bike was ridden for long periods (10-15 minutes) at 1/4 to 1/2 throttle with no W.O.T runs, it would get hot-fast, regardless of speed. Run the bike hard for a few moments and temperature would drop 50 degrees back to 250.
Only thing I can figure is that running hard moves more fuel into the engine, cooling it. What do you think?
I'm using Avgas 100LL.
Today I ran a 170 main, stock needle on 4th clip, and a 45 pilot (stock carb-no choke).
That 45 pilot is too rich I think. It won't ilde with the screw out 2.5 turns. With the scew out 1 turn, it idles slow. With the screw all the way in , it idles well. This means I have to drop to a 42 pilot, right?
Anyway back to the temperature thing. Might the engine run cooler at part throttle if I move to position #5 on the needle? Is this setting unheard of with the below set-up? Will it even run?
Help!
Thanks, Steve.
I first noticed this when i started letting novice guests ride my bike. At first I couldn't understand it.
When I rode the bike, oil temperature stayed between 220 and 250 degrees. Everytime I let someone else ride it, oil temp would shoot to over 300 degrees????
After time, I discovered that when the bike was ridden for long periods (10-15 minutes) at 1/4 to 1/2 throttle with no W.O.T runs, it would get hot-fast, regardless of speed. Run the bike hard for a few moments and temperature would drop 50 degrees back to 250.
Only thing I can figure is that running hard moves more fuel into the engine, cooling it. What do you think?
I'm using Avgas 100LL.
Today I ran a 170 main, stock needle on 4th clip, and a 45 pilot (stock carb-no choke).
That 45 pilot is too rich I think. It won't ilde with the screw out 2.5 turns. With the scew out 1 turn, it idles slow. With the screw all the way in , it idles well. This means I have to drop to a 42 pilot, right?
Anyway back to the temperature thing. Might the engine run cooler at part throttle if I move to position #5 on the needle? Is this setting unheard of with the below set-up? Will it even run?
Help!
Thanks, Steve.