how hot does the hottest part of the bike get? - Page 2

BigIron · 06-25-2008, 09:47 PM

I am really interested in how hot the exhaust gets. I just bought some header paint thats rated for 1300-2000 degrees F. I doubt it will handle 2000 F. but thats what the can says. I am planning to do the front portion of the pipes but havn't had the time.
If someone has a thermometer that would measure the header temp I think you would be doing this forum a great service.

JIBTEXHNKA · 06-25-2008, 10:00 PM

well the reason i asked in the first place was beause i was at work and i didn't bring a lighter... i was trying to find out if i'd be able to light a cigarette on the engine or something. so i'll give it a try later and we'll find out if it's at least about 451, because last i checked that's when paper ignites.

patrick_777 · 06-25-2008, 10:37 PM

Next time I ride, I'll temp it and find a number.

patrick_777 · 06-26-2008, 05:22 AM

Just got back from about 20 minutes of slow speed parking lot practice and about 5 more minutes to get back home at just over 40 mph. I let the bike sit for about 2 minutes while I went into the kitchen to get the infrared thermometer. I ran it over the bike and got a max of 348° right off the cylinder-head to the exhaust pipes. The first bend of the exhaust averaged about 310° and it got progressively cooler farther down the pipe. The outside of the muffler about 3" from the tip was around 190° but the black exhaust port in the end was 297 max°.

The rear of the cylinder-head was the second hottest at around 330° and the side was just over 320°. For reference, the oil filler cap was at max 150°; the block, right below the idle screw was only 145°; and the oil filter cover was only about 140° (this is where my pant leg usually rubs while braking).

Edit: A picture is worth a thousand words:

* Base image "borrowed" from motorcyclecruiser.com.

JIBTEXHNKA · 06-26-2008, 06:35 AM

NICE! :2tup:

thank you very much, that was way more informative than i expected. ha

**jonathan180iq** · 06-26-2008, 08:42 AM

Wow. That's good information. Nice work.

patrick_777 · 06-26-2008, 04:13 PM

Just got back in from a 45 minute / ~35 mile ride which consisted almost entirely of "highway" (55 mph) speeds. The temp on the hottest part maxed at 393°F with everything else pretty much staying proportional from this morning's measurement.

**jonathan180iq** · 06-26-2008, 04:20 PM

You've done a lot of work on this and at least answered Jib's question.

We now know that he can't light his cigarette on the exhaust...

Poor guy.

patrick_777 · 06-26-2008, 04:31 PM

If only there was some way for him to get the bike to shoot flames out of the exhaust....

:rawk:

patrick_777 · 06-26-2008, 04:36 PM

Quote:

Originally Posted by jonathan180iq

You've done a lot of work on this and at least answered Jib's question.

Are you saying I have, yet again, gone too far?

06-25-2008, 09:47 PM	#11
BigIron Member Join Date: Sep 2007 Location: Ohio,USA Posts: 51	I am really interested in how hot the exhaust gets. I just bought some header paint thats rated for 1300-2000 degrees F. I doubt it will handle 2000 F. but thats what the can says. I am planning to do the front portion of the pipes but havn't had the time. If someone has a thermometer that would measure the header temp I think you would be doing this forum a great service. Login or Register to Remove Ads
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06-25-2008, 10:37 PM	#13
patrick_777 Senior Member Join Date: May 2008 Location: Tulsa, OK Posts: 1,763	Next time I ride, I'll temp it and find a number. __________________ ]I am hiding in Honduras. I am a desperate man. Send lawyers, guns and money. The shit has hit the fan. Login or Register to Remove Ads
	0

06-26-2008, 05:22 AM	#14
patrick_777 Senior Member Join Date: May 2008 Location: Tulsa, OK Posts: 1,763	Just got back from about 20 minutes of slow speed parking lot practice and about 5 more minutes to get back home at just over 40 mph. I let the bike sit for about 2 minutes while I went into the kitchen to get the infrared thermometer. I ran it over the bike and got a max of 348° right off the cylinder-head to the exhaust pipes. The first bend of the exhaust averaged about 310° and it got progressively cooler farther down the pipe. The outside of the muffler about 3" from the tip was around 190° but the black exhaust port in the end was 297 max°. The rear of the cylinder-head was the second hottest at around 330° and the side was just over 320°. For reference, the oil filler cap was at max 150°; the block, right below the idle screw was only 145°; and the oil filter cover was only about 140° (this is where my pant leg usually rubs while braking). Edit: A picture is worth a thousand words: * Base image "borrowed" from motorcyclecruiser.com. __________________ ]I am hiding in Honduras. I am a desperate man. Send lawyers, guns and money. The shit has hit the fan.
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06-26-2008, 06:35 AM	#15
JIBTEXHNKA Senior Member Join Date: May 2008 Location: Tacoma, Washington Posts: 120	NICE! :2tup: thank you very much, that was way more informative than i expected. ha Login or Register to Remove Ads
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06-26-2008, 04:13 PM	#17
patrick_777 Senior Member Join Date: May 2008 Location: Tulsa, OK Posts: 1,763	Just got back in from a 45 minute / ~35 mile ride which consisted almost entirely of "highway" (55 mph) speeds. The temp on the hottest part maxed at 393°F with everything else pretty much staying proportional from this morning's measurement. __________________ ]I am hiding in Honduras. I am a desperate man. Send lawyers, guns and money. The shit has hit the fan.
	0

06-25-2008, 10:00 PM	#12
JIBTEXHNKA Senior Member Join Date: May 2008 Location: Tacoma, Washington Posts: 120	well the reason i asked in the first place was beause i was at work and i didn't bring a lighter... i was trying to find out if i'd be able to light a cigarette on the engine or something. so i'll give it a try later and we'll find out if it's at least about 451, because last i checked that's when paper ignites.
	0

06-26-2008, 08:42 AM	#16
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	Wow. That's good information. Nice work.
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06-26-2008, 04:20 PM	#18
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	You've done a lot of work on this and at least answered Jib's question. We now know that he can't light his cigarette on the exhaust... Poor guy.
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06-26-2008, 04:31 PM	#19
patrick_777 Senior Member Join Date: May 2008 Location: Tulsa, OK Posts: 1,763	If only there was some way for him to get the bike to shoot flames out of the exhaust.... :rawk: __________________ ]I am hiding in Honduras. I am a desperate man. Send lawyers, guns and money. The shit has hit the fan.
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