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No pics yet, cause it was dark when we finished, but we wrapped the exhaust pipe, and installed a aluminum plate above the Diff, i cant remember the test temps from before that i did, but it was hot as everybody else had said. But after the install, we went on a 2-3 mile ride at about 32mph, came back, i dont remember all the numbers to be exact, i didnt put it down on paper, but the pipe above the diff was 300 something, top of plate 100 something, but on top of the diff, i do remember was 61, and the outside temp was 49. The wrap and plate made a HUGE difference. Will post pics asap.
 
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Discussion Starter #4
Looks just like member lilbigtonkas

 

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Heat Problem

I don't really understand the discussions about the heat problem. Would someone explain. What does the factory say. Thanks
 

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I don't really understand the discussions about the heat problem. Would someone explain. What does the factory say. Thanks
. The glowing red exhaust pipe, which it does after a very, very short ride, transfers a lot of heat to the rear diff. I did a little test to see the temp difference with and without an improvised heat shield. Without a shield, my diff temp was 230 degrees, hot enough to fry an egg, after a 2 mile ride at between 20-25 mph. The air temp was around 50 degrees. Imagine how hot the diff would get in 90 plus degree weather after a long, hard ride. With a shield, after a longer, faster, ride the diff temp was 80 degrees. The high diff temp seems to contribute to leaky diff seals as some members have noted. As well as being harder on the gear lube. The diff with get warm all on it's own, it does not need any additional heat from the exhaust. As far as the factory is concerned, I have called it and was not permitted to talk with anybody. So I called Yamaha consumer affairs, I think it was, and got nowhere with them also. So I called my dealer who said he will badger is rep. Hopefully they will put a shield on newer ones. But that does not help us:(
 

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Discussion Starter #9
Ok, here's a pic of mine all done.
 

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What type of wrap did you use and where did you get it? How thick is alum? I have some at work but don't think it is quite that guage.
 

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I just worry about header wrap. Sure it keeps heat on the outside down but the heat doesn't just disappear, its simply insulated within the pipe. Be careful with wraps because they can and will trap moisture inside the system and rust it from the inside out.

I've seen it before on motorcycles....
 

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I have ran wrap forever and never rusted out and my bikes stay in the mud....the wrap gets wet but the heat drys it faster then it could ever think about developing moisture and causing rust
 

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The main header/downpipe is a 300 series stainless steel, so wrapping that won't be an issue. The remainder of the exhaust is magnetic, so it's a lower grade stainless, or regular steel... it will take a little time to find out.
 

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Is it just mine or do they all smoke like a freight train till that header wrap burns in. I used black wrap and this white smoke rolled out off it for a long time.
 

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I haven't noticed any smoke, just the smell.
 

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I cut out some heat shields last night for mine.... Simple process really... I used 12 gauge steel and am going to paint it... But I could make them out of stainless or aluminum.....

I am posted in the classifieds here on the forums a post for selling them..... Or you can PM me about getting a set....








Daryl...
 

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Discussion Starter #19
Thanks for doing that, should help out many current and future members, at a fair price too.

Those back holes, are fun getting to, lol. Took some time getting the nuts and washers on the bolt, had to get m fingers to make the right moves.
 

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I cut out some heat shields last night for mine.... Simple process really... I used 12 gauge steel and am going to paint it... But I could make them out of stainless or aluminum.....

I am posted in the classifieds here on the forums a post for selling them..... Or you can PM me about getting a set....







Daryl...
Sweet! Seems like you have access to a CNC machine?
Those pieces look great, can't wait to see them painted. How will you be painting them?
 
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