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Too Hot?

Joined Aug 2008
21 Posts | 0+
BC Canada
For those who ride slow technical stuff of sometimes sit in traffic, I highly recomment wrapping your exhaust with a thermal insulating wrap. I wraped mine with a DEI 1" wide wrap and SS ties. Then painted with the silicone spray.
The reason for this started when I shot the engine case and head with my infrared thermometer at areas close to the exhaust while the engine was idling in my shop. The radiant heat transfer was huge! Over 180 degrees C I was reading in most areas. Obviously this heat transfer makes it's way to the cooling system and the radiator has to deal with it. After wrapping, the 180+ areas were now a bit over 100 degrees C.
I wrapped the whole thing all the way back to the silencer to also stop radiant heat from reaching my shock. This also helps things if you have to operate the hot start pull so your hands don't get burnt. You can actually touch the exhaust while it's running with bare hands. Just don't touch for too long, it's still hot, just not as hot.
Another major difference you notice is the amount of heat rising from beneath your legs while moving slowly or stopped. Huge reduction!
I believe this can really help some cooling issues.
 
Hi

I also done the wraping thing, but just on the mid pipe (it was too close to the carb and the fuel line, I've put an FCR on a old 400) and a bit on the pipe going to the muffler to stop burning my pants.

Once I've measured the temp with my laser and if I remember the head was about 90ºC. You might be a little lean on your jetting or with the ignition timming over advanced, might what to check.

:cheers:
ZAGA
 
The areas of the head that were hotter were directly accross from the pipes. The rest of the head was still pretty cool, I forget what the numbers were but I think between 80 and 90.
 
I've considered it, but was told by several that under the thermal wrap your pipes will rust out. So I went another way...
 

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HI

On the wraping thing I went like this:

[attachment=0:3hwsdr9j]wraping.jpg[/attachment:3hwsdr9j]

:cheers:
ZAGA
 

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I just had my 390 pipe ceramic coated. ($60) I haven't picked it up yet, but hopefully this will resve the hear transfer issue. I ran wrap last season, and it definitely helped. I just wanted a cleaner look, and easier cleaning ability for the muddy stuff we ride.
 
Anyone measured temps with aftermarket titanium full system? Titanium is thinner and releases temps more quickly than stainless, so in theory the radiant heat will be higher.

I'm going to run full FMF system and need to do something so the fuel near pump is not going to get too hot and my leg area. Titanium cannot be wrapped with conventional stuff as it will corrode too quickly and soon to have holes in the pipe.
 

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