High exhaust temp, something wrong ?

[Jackal]

My ZE have 6000 km on the clock, last weekend I did a trip to the Karoo but was late and had to meet people at a place,

Long story short, I did a 170 km with panniers and pillion and kept the speed at 190/200km/p/hr the whole 170 km, after the ride I washed my bike and noticed that the Akropovic sticker on the back of the exhaust had melted, I also noticed that the header pipes is much bluer than before and also a big colour diff between the two pipes, I tooked the bike for another ride, about 200 km's and found that the carbonfibre end of the Akropovic becomes hot.

Now, do I have something to worry about the exhaust temp, The Akropovic had done about 50 000 km because I tooked it of my previous S10, I had also ride my previous S10 at the same speed but the sticker didnt melt.

Can it be bad for the engine to do that speed for 170 km and what damage could happen, The engine still sounds good without any problem.

Please all the technical guys, give some info and do I have something to worry about.

 

[Koinz]

At what RPM are you running at 190-200 Kph and for how long. Engines run hot at high RPM and for long distances. As a matter of fact, so do we. : Trying running 5 miles at a full sprint and tells how it works out for you

 

[20valves]

At 170-200 KPH you were basically running the thing close to as fast as it can possibly go for an hour. Expect heat and wear to increase when doing that, there's no way around it.

 

[Jackal]

Didnt check the rpm,

Lets say 30 % of the road was below 100 km/p/hr,

Is the heat on the carbon fibre normal on normal riding or does the Akropovic needs to be serviced on that km's.

Is the best option to sell this bike just before the waranty expire. ;D

 

[20valves]

Is the heat on the carbon fibre normal on normal riding or does the Akropovic needs to be serviced on that km's.

CF can take a lot of heat, apparently more than the sticker. Could the sticker also be suffering from a little "sunburn" by being left in the sun by previous owner? That might have weathered it enough that your high speed run just pushed it over the edge. I'd just take the sticker off if it looks bad.

 

[Koinz]

No, that's what they do with BMW's

 

[Big Blu]

I took the opposite approach. Rather then spend $$$ on the 26k mile service, clutch basket upgrade, CCT upgrade, I upgraded the entire bike to a BMW GSA. No worries for 3 years now! ::008::

Paul

 

[justbob]

I took the opposite approach. Rather then spend $$$ on the 26k mile service, clutch basket upgrade, CCT upgrade, I upgraded the entire bike to a BMW GSA. No worries for 3 years now! ::008::

Paul

3 yrs or 36,000 miles, whichever comes first, for me that would provide less than 2 yrs of warranty.

 

[Big Blu]

3 yrs or 36,000 miles, whichever comes first, for me that would provide less than 2 yrs of warranty.

Same here, 20K-25K miles a year, 7-8K each summer in Europe playing in the Alps, and I spread the mileage across 3-4 bikes. I had the S10 for 32 months, that may have been a record for me, it brought me lot's of smile during those miles.

Paul

 

[KPK]

Didnt check the rpm,

Lets say 30 % of the road was below 100 km/p/hr,

Is the heat on the carbon fibre normal on normal riding or does the Akropovic needs to be serviced on that km's.

Is the best option to sell this bike just before the waranty expire. ;D

i would not worry about it to much and just ride! I have ran my S10 through a full tank of gas multiple times at those speeds. My header pipe looks the same as yours and have a carbon Leo pipe with 26000 miles. Plugs looked fine at 24000 miles and she never burns any oil. Other then getting shitty gas mileage I wouldnt worry to much about it its a Yamaha ::021::

 

[bigbob]

I also noticed that the header pipes is much bluer than before and also a big colour diff between the two pipes

Would the color difference mean that cylinder is richer/leaner than the other. Enough to have a significant difference in exhaust temp?

 

[Don in Lodi]

Over 118 mph for an extended period? ??? I'm sorry to say my friend, I think you bought the wrong bike. If this is your normal routine you're going to need something else. I don't even want to guess how hot everything around the cat got. Glad you didn't park it in any deep grass, she would have fixed your problem by burning to the ground.

 

[Mzee]

Over 118 mph for an extended period? ??? I'm sorry to say my friend, I think you bought the wrong bike. If this is your normal routine you're going to need something else. I don't even want to guess how hot everything around the cat got. Glad you didn't park it in any deep grass, she would have fixed your problem by burning to the ground.

While I know there are times for jesting, Jakkal has asked a useful question that might benefit many others. Please make an effort to respond to him.

Does the cat contribute to excessive heat?

Other than the heat have you noticed anything else, e.g., high consumption of oil, etc?

 

[Don in Lodi]

Sorry. At wide open throttle for extended periods, all bets are off. Nobody tunes a bike for wide open throttle. You'd need a good dyno tuner to work up stuff for wide open throttle... if they're willing to wring every last bit of snot out of the bike on their liability. If he had problems where most of us spend time, under a 100 mph, maybe we could come up with really useful information.
I'd be willing to bet money the cat had to be pushing a 1000 degrees Fahrenheit by the end of that run. It's only a couple feet from there to the carbon tip of the muffler. So, yep, that's what burned up the sticker. The packing is probably shot as well.
Apologies again, been a mechanic for over a quarter century, for me this is like somebody kicking a puppy just because. Wringing the life from a motor, just because, and then wondering why things changed color or burned up... ::010::

 

[Jackal]

I do not ride that speed all the time for extented km's, that was more like a once off thing, if I wanted to do those type of speed all the time I would have bought myself something else, I'm more on the gravel roads and that is why I bought the bike for.

Ok so if I understand correct the colour difference on the headers are normal at that type of speed becuase the cat are not design to work with that amount of hot air going trow it for that time period and basicly greated more heat due to the "blockage" at the cat.

The engine water temp where normal the whole stretch so I dont think the engine worked much harder or being over worked, exept for the higher exhaust temp, but will the higher temp be more in the outlet (exhaust) sistem or also in the combustion chamber and will the exhaust temp be lower if the cat has been removed due to better air flow.

Under normal ridding conditions the header pipes also diffrence in colour and that also tells me that the one cylinder is running hotter than the other, I had seen that on all the S10'S we have here in SA.

I know there must be more wear on the engine if you run it at that speed but does a once off realy shorten the engine life that much, my opinion is that if you ride your bike as a robot to robot racer with high rpm's and gear changes all the time is much more of a engine killer, I'am correct if I think so ?

Also take in mind that the Akrapovic came from my Gen1 S10 and have done around 50 000 km's so I dont think the internal packing in the mufler will be the same as new.

 

[Jackal]

I must agree on this one. ::003::

 

[Jackal]

i would not worry about it to much and just ride! I have ran my S10 through a full tank of gas multiple times at those speeds. My header pipe looks the same as yours and have a carbon Leo pipe with 26000 miles. Plugs looked fine at 24000 miles and she never burns any oil. Other then getting shitty gas mileage I wouldnt worry to much about it its a Yamaha ::021::

Thanks for your reply, it sure put more peach of mind in my question. ::008::

 

[Derekj]

Hey Boet,
Jy moenie worrie nie. Daai sticker is mos kak and is besig om vir jou te se dat jy moet hom afhaal. Seriously, just keep on riding it like you stole it.

 

[Jackal]

Hey Boet,
Jy moenie worrie nie. Daai sticker is mos kak and is besig om vir jou te se dat jy moet hom afhaal. Seriously, just keep on riding it like you stole it.

Ha ha ha, nog iemand wat die boertjie taal praat op die forum. ::003::


Yes, that sticker had done about 50 000 km with the mufler so maybe the mufler needs new packing becuase it never happens on my previous S10, ok on my Gen 1 S10 the cat I had the cat removed so maybe the cat have something to do with the heat, CO settings on both bikes were std.

 

[Random ride]

The exhaust will definitely run cooler without the cat. Those things get crazy warm just riding at "spirited" speeds let alone WFO ::021::