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If you can dodge a wrench
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465 Posts
Discussion Starter #1
Hey guys I’m sure I’ll catch some heat for this one, to defend myself I haven’t rode the bike much in the past two years for various reasons. Anyways I recently started riding the bike again and remember the temps hanging out around 168ish on the highway ( SoCal) even during the summer. The past few times I have gone out the bike has been hitting 180-185 while cruising on the highway with an ambient temp of 80-85. I know the hotter it is outside the hotter the bike will be but it just seems weird to me that it would be that high while going 85-90 on the highway. I was thinking maybe the thermostat was sticking big could also just be crazy since I haven’t rode it forever. It is a 2015 with the recall performed, ECU flash w/auto tune.
 

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2019 R1M
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17 Posts
Were getting 26C (180f) weather in the UK, My bike today was showing roughly the same engine temps at around 50mph.
Usually in low ambient temps 15-20C (59-68f), I display 73-78c on 50-60mph roads.
Even if the temps are similar to my bike, I would change the coolant on a 4 year old bike.
 

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THEONEGTIVR6
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1,329 Posts
I notice my 04 R1 runs 10/15 degrees hotter when the coolant is a couple years old. Engine ice is what I use and they say it’s performance will decrease after a season or 2.
 

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6 Posts
My 18 R1M runs about 167F when I'm cruising. Ambient around 80 (also in SoCal). Stock fluid, barely 2000 miles on the bike. I do have a FTECU flash (along with autotune) that kicks the fans on at 206F and cuts at 196F. If you have a bike side harness and the FTECU connector, you can always check the software to see what your map is programmed at. Flush your cooling system like the previous guys said. I used to flush once a year and never saw any temps past 180 while at highway speeds on my R6.
 
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