Right leg under thigh getting cooked

Bringing up this old thread as i've been really feeling this heat on my R1200GS 2013 LC on these hot days - especially at Motorway/Dual carriageway speeds.

I have a Mudsling, which i have read can change the airflow causing it to cook the right leg. I have installed a Wunderlich/Puig heat deflector which helps somewhat to deflect but you still feel the build up of heat on the inside. I have recently got a high temperature exhaust blanket to go around the top half/right hand side of the catalytic converter to try and reflect the heat back/stop it radiating out and upwards so much. Not yet tested it but hoping to do so this week/weekend to see how it fairs in reducing the heat output.

It is this, if anyone is interested

After a ride in the heat, i can report the heat wrap works to keep the majority of the heat off the right leg. At times there is still an updraft of heat you can feel on the lower thigh, but no where near as bad as it was before.
 
After a ride in the heat, i can report the heat wrap works to keep the majority of the heat off the right leg. At times there is still an updraft of heat you can feel on the lower thigh, but no where near as bad as it was before.

Further development with this.

i removed the mudsling to see if this helped, and it sort of did. But was still not a huge difference.

The first heat shield/wrap i put on went round the right hand side which helped to reduce the immediate heat to teh right foot/leg. However this still left half the top exposed, and heat was now getting reflected to the left foot too. To help solve this i installed another heat shield/wrap to cover the left hand side and remainder of the top.
After some riding this weekend in the hot weather and all sorts of riding (Motorway, Dual carriage way, round town etc) it feels a lot better. I'm still aware of the heat, but it's no where near how bad it was.
 
I've not got side panniers but have a mudsling. Can't see that making a huge difference other than a small amount of air not being pushed forward from the rotation of the tyre.

Odd that it's at higher speeds. I understand the more fuel your shoving through the engine the hotter the cat will get but we all know the wind blast from sticking ya arm out as it nearly get ripped off. I'm guessing that the shape of the GSA front end causes a pocket of almost still air causing the heat to radiate to your thigh, calf and foot on right side.

Jon

I also use Mudsling and I noticed that the temperature is higher next to the right foot. I did the experiment with and without Mudsling and now I only use this one in winter where the temperature can even be well received. With the arrival of summer, I remove the Mudsling and the temperature on the right foot starts to be acceptable, although always hot.
 
I have a roll of heat wrap in my garage, thanks for the tip.

I may fit some to my GSA exhaust under my right foot area by the flappy valve to keep radiated heat down.
 
Ok... was out on a rideout today, done 315 miles with sunny temps around 29 degrees C

Most of my ride was quick, accellerating, overtaking, up and down the gearbox... and I didn't notice any thigh cooking.

BUT.... there were a couple of long stretches of road where the speed was fairly static, and that's when I noticed a sudden heat buildup on my right leg.

As soon as I started overtaking and cornering again, it went away.

So to me, it appears to be an airflow thing from the exhaust.
Just bringing this thread back again.

Noticed yesterday, my '71 plate has a similar issue. Riding along, heat by the right thigh. But only seems to happen on boring motorways, twisty and that, no issue.

Are people still having these issues on later 1250's? What's the fix here? I will remove the mudslinger to see if it helps at all..
 
Just bringing this thread back again.

Noticed yesterday, my '71 plate has a similar issue. Riding along, heat by the right thigh. But only seems to happen on boring motorways, twisty and that, no issue.

Are people still having these issues on later 1250's? What's the fix here? I will remove the mudslinger to see if it helps at all..
No problem on my 2022. Never noticed any heat from the bike. Sure you didn't have the sun on that leg?
 
No problem on my 2022. Never noticed any heat from the bike. Sure you didn't have the sun on that leg?
Unless the sun was inside my bike, no :ROFLMAO: my inner thigh/leg got warm on the RHS.

But no glowing red headers.
 
Sounds like heat from your exhaust is being blown up under your seat, perhaps fitting a Heat Displacement Shield is required, formerly known as baking foil, stapled to the underside of your seat, should help.
Or for the posh stuff some of these stuck onto underside of your seat.

*I fitted this to the lower fairing on my FJ1200 after buying an aftermarket replacement without shielding from exhaust downpipes, worked a treat*.

Alternative, buy an aftermarket Carbon covered exhaust silencer, very little heat comes off them cold to the touch even after motorway speeds.

 
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I don’t think I’ve ever owned a bike where there wasn’t heat radiating on one leg or another. I just get on with it. Same as I don’t have AC in the car...I just get on with it.
 
Sounds like heat from your exhaust is being blown up under your seat, perhaps fitting a Heat Displacement Shield is required, formerly known as baking foil, stapled to the underside of your seat, should help.
Or for the posh stuff some of these stuck onto underside of your seat.

*I fitted this to the lower fairing on my FJ1200 after buying an aftermarket replacement without shielding from exhaust downpipes, worked a treat*.

Alternative, buy an aftermarket Carbon covered exhaust silencer, very little heat comes off them cold to the touch even after motorway speeds.

Interesting. Might research and see where the best place to put it, not sure how going underneath my seat would help?

Might take the mudslinger off to see if it helps with air flow.
 
Have you made any changes to the standard exhaust? New silencer perhaps?....it might have been mentioned in previous posts, but I know for a fact that normal Stainless Steel silencers get extremely hot too the touch, which can induce serious burns to legs or fingers.
A Carbon covered exhaust silencer, even after motorway riding, it is still possible to lay a hand and keep it on it, for not much heat is transferred through the carbon covering.
I noticed this on my last bike, I changed from stainless to a carbon silencer, the difference was night n day.
 
Have you made any changes to the standard exhaust? New silencer perhaps?....it might have been mentioned in previous posts, but I know for a fact that normal Stainless Steel silencers get extremely hot too the touch, which can induce serious burns to legs or fingers.
A Carbon covered exhaust silencer, even after motorway riding, it is still possible to lay a hand and keep it on it, for not much heat is transferred through the carbon covering.
I noticed this on my last bike, I changed from stainless to a carbon silencer, the difference was night n day.
Nope, stock standard.

By silencer, do you mean the end can? Sorry, not clued up with the names for these things :ROFLMAO:
 
I noticed heat coming up from around only my right calf on my 2014 R1200GSA. The worst was when running the bike fairly hard like 80 mph especially in warm weather so I suspected there was some turbulence being generated that blew heat from the cat/collector up. I first noticed it being uncomfortable down in Texas not long after I bought the bike in April.
I would have thought surely someone's come up with a deflector or shield by now to address the problem.
 
Nope, stock standard.

By silencer, do you mean the end can? Sorry, not clued up with the names for these things :ROFLMAO:
No problem, many people have other names for them, silencer complete with a baffle insert, slip-on's, can or cans, spouts, end can like you mentioned.
I have always known bike exhausts complete as follows, down-pipes from heads, Cat, if one fitted, Y piece sometimes for 2 into one, then the silencer, sometimes a slip-on joining piece from down pipes to the silencer. ....Peashooters! for the huge OEM pipes as well. :D
 


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