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I have an older bike (2003 ultra) with a dakota digital oil temp gauge. I have never seen it over 225* even slow riding in the desert at 105* ambient temp. I'm not worried.
I sent an Email to Fuel Moto, this is the reply...
Good Morning Scott,
Normal operating temperature for your motorcycle would be between 260-320 degrees Fahrenheit. If you were to be stuck in traffic or idling for an extended period of time and you exceed 340 degrees I would personally turn the bike off to allow it to cool before continuing. Please let us know how else we could be of assistance!
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Thank you.........Brian
Fuel Moto
2215 Kelbe Dr
Little Chute, WI 54140
Sales/Tech 920-423-3309
Specializing in EFI tuning and Exhaust components
Fuel Moto websites: www.fuelmotousa.comwww.jackpotmufflers.com
From: Annemasse (border of Geneva-Switzerland) facing Mt-Blanc.
The (2) upper fins of my rear cylinder are at 350°F when the engine idles only from the front cylinder, the engine oil is then at 220°F in the filling port and I measured 200°F on the outer casing between primary and the gearbox. I expect the bearing inside the clutch basket to reach 250°F, and this is why I'm using a 20W60 to see how it behaves.
Temperatures were measured using one type 'K' sensor and one IR thermometer @95% emissivity where the aluminum is sand blasted.
For info: polished aluminum was only reflecting 95°F to the IR thermometer @95% emissivity when the type 'K' sensor (in contact) measured 200°F.
According to my "digital hd dip stick" I run an average of 230 fully hot.
If I'm riding her hard over 80 - 85 mph or more then off ramp for gas and check it after it heat soaks I'll be near 280.
The (2) upper fins of my rear cylinder are at 350°F when the engine idles only from the front cylinder, the engine oil is then at 220°F in the filling port and I measured 200°F on the outer casing between primary and the gearbox. I expect the bearing inside the clutch basket to reach 250°F, and this is why I'm using a 20W60 to see how it behaves.
Temperatures were measured using one type 'K' sensor and one IR thermometer @95% emissivity where the aluminum is sand blasted.
For info: polished aluminum was only reflecting 95°F to the IR thermometer @95% emissivity when the type 'K' sensor (in contact) measured 200°F.
Moco suggested operating temp is 180-220.
I generally run around 215, once in while get higher than that, not much though.
I run an oil bud oil cooler though.
Biggest and most expensive that there is to my knowledge.
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