Cool Running M8
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Road Master
Joined: Jun 2013
Posts: 1,058
Likes: 953
From: Sarasota Florida
Cool Running M8
I just picked up a 22 Street Bob 114. Have just under 1000 miles right now. I am very pleasant surprised by how little heat the motor puts out. I go for 70 mile rides here in sunny Florida and when I stop I don't sense any uncomfortable heat.
I am comparing the Bob to my last bike, a 2016 Fatboy S 110. That bike threw out a ton of heat and even with a crotch cooler I would roast. So good on Harley.
I am comparing the Bob to my last bike, a 2016 Fatboy S 110. That bike threw out a ton of heat and even with a crotch cooler I would roast. So good on Harley.
Seasoned HDF Member
Joined: Jun 2010
Posts: 9,332
Likes: 3,873
From: Upstate New York
I agree. My 19 Heritage is even a bit better in that regard than my Evo Heritage and far better than Twin Cam Softails Ive ridden.
Moving the oil tank under the transmission and the catalyst to the mufflers really helped keeping excess heat away from the rider.
Moving the oil tank under the transmission and the catalyst to the mufflers really helped keeping excess heat away from the rider.
Last edited by Uncle G.; Oct 14, 2022 at 04:08 PM.
HDF Community Team
Joined: Oct 2018
Posts: 4,347
Likes: 3,392
From: Seattle
Yeah I really dont notice any heat when riding unless its a really hot ****in day, then I can feel a bit of heat radiation from the engine.
It's nothing like my dad's EVO sporty where you could absolutely feel that heat.
It's nothing like my dad's EVO sporty where you could absolutely feel that heat.
Stage IV
Joined: Sep 2022
Posts: 4
Likes: 0
From: SoFLo
I just picked up a 22 Street Bob 114. Have just under 1000 miles right now. I am very pleasant surprised by how little heat the motor puts out. I go for 70 mile rides here in sunny Florida and when I stop I don't sense any uncomfortable heat.
I am comparing the Bob to my last bike, a 2016 Fatboy S 110. That bike threw out a ton of heat and even with a crotch cooler I would roast. So good on Harley.
I am comparing the Bob to my last bike, a 2016 Fatboy S 110. That bike threw out a ton of heat and even with a crotch cooler I would roast. So good on Harley.
HDF Community Team
Joined: Oct 2018
Posts: 4,347
Likes: 3,392
From: Seattle
My 2022 FatBob gets so hot on the right side that even with reinforced jeans I ride with I die from the heat coming off the rear cylinder head.. Granted, I dont have the rear cylinder cutoff programmed to come on, but these 5 minute traffic lights here in SoFlo are so brutal that I just shut the engine down if Im at the wrong end of the traffic light cycle.
Tons of modern cars already do this.
Harley has done a very good job at not having the heat radiate out to the rider and passenger. However, the engines run just as hot, or hotter, as the Twin Cams. This heat is power robbing and reduces engine longevity.
The fact that many M8 riders do not feel as much heat is deceptive, leading many folks to believe that the engine is not running too hot for it's own good.
You can see in the video below what happens when they get to OEM "normal" temps. They are much hotter than the manual says is ideal (230 F oil temp) and HD has attempted to cool them down by retarding the timing. Take a look at these two videos, with dyno charts, and see what is happening.
Here is a LINK to a Report on what we do for our own bikes to keep the temps in the optimum range for the engines benefit.
The fact that many M8 riders do not feel as much heat is deceptive, leading many folks to believe that the engine is not running too hot for it's own good.
You can see in the video below what happens when they get to OEM "normal" temps. They are much hotter than the manual says is ideal (230 F oil temp) and HD has attempted to cool them down by retarding the timing. Take a look at these two videos, with dyno charts, and see what is happening.
Here is a LINK to a Report on what we do for our own bikes to keep the temps in the optimum range for the engines benefit.
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Last edited by DK Custom; Oct 17, 2022 at 04:45 PM.
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Bart van der Meulen
General Harley Davidson Chat
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