SuzukiSavage.com - Extremely Hot Pipe

hockmanjosh YaBB Newbies Offline Posts: 33 Park City, UT Gender:	Extremely Hot Pipe 06/08/16 at 11:43:06 I just put on a dyna muffler. Everything fits up just fine, and sounds MEAN! However, the header pipe is getting extremely hot (burning paper towels when I touch them to it). Any ideas why?
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Armen Serious Thumper Offline Half-Witted Wrench-Jockey from Jersey Posts: 1452	Re: Extremely Hot Pipe Reply #1 - 06/08/16 at 11:48:38 Stock the bikes are real lean and run hot. Lower restriction muff means REAL lean and even hotter. Guess what happens next?
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hockmanjosh YaBB Newbies Offline Posts: 33 Park City, UT Gender:	Re: Extremely Hot Pipe Reply #2 - 06/08/16 at 11:56:09 What would you recommend that I do to not make these pipes run so hot? Armen wrote on 06/08/16 at 11:48:38: Stock the bikes are real lean and run hot. Lower restriction muff means REAL lean and even hotter. Guess what happens next?
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old.indian Serious Thumper Offline Fighting Foreign Terrorism since 1492 Posts: 975 Central New Mexico Gender:	Re: Extremely Hot Pipe Reply #3 - 06/08/16 at 12:13:12 #1) Park City is at roughly 7,000+ feet and the bike is set at the factory to run lean at sea level. #2) By changing the muffler you make it even leaner. Best thing to do is to re-jet the carb and install a less restrictive air cleaner..
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verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28886 L.A. California Gender:	Re: Extremely Hot Pipe Reply #4 - 06/08/16 at 12:16:46 1st don't sit there and idle more than a couple of minutes it takes to get ready to ride. Extended idling will overheat the pipe. Also idling on the kickstand or leaned over provides uneven oiling to the cam and rockers. Especially if your idle is really low.
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Re: Extremely Hot Pipe
Reply #5 - 06/08/16 at 12:27:35

old.indian wrote on 06/08/16 at 12:13:12:

#1) Park City is at roughly 7,000+ feet and the bike is set at the factory to run lean at sea level.

#2) By changing the muffler you make it even leaner.

Best thing to do is to re-jet the carb and install a less restrictive air cleaner.. Cool

When you're higher in altitude, less oxygen goes in with the same amount of gas. So a lean setting at sea level maybe perfect at 7,000 feet. At least that's what the guys in Denver claim.

So does the Dyna have the baffle knocked out?
A stock Dyna may not need any adjustment.

Set your jets so the bike runs right.
If the pipe turns purple, it might be hotter than usual, gold is typical.
if you want, get an infrared temperature gage and measure the temp.

We can start a thread with hot numbers for reference.

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Re: Extremely Hot Pipe
Reply #6 - 06/08/16 at 13:46:26

verslagen1 wrote on 06/08/16 at 12:27:35:

We can start a thread with hot numbers for reference.

I think that would be cool (no pun intended Wink

). I have one of those gadgets and would be interested to see how hot I am (my wife says not very Grin

).

Just need to know at what point to measure such as immediately after riding moderately for XX time and where on the pipe to measure.

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Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18101 Camp Springs, Kentucky Gender:	Re: Extremely Hot Pipe Reply #7 - 06/08/16 at 13:53:38 I bought a "point and shoot" (infra red) temperature gun from Harbor Freight a while back, and is seems to work really well on the stuff I am powder coating - but I did shoot it at the exhaust pipe.....and I don't think it gets an accurate reading when pointed at the chrom header pipe.
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hockmanjosh YaBB Newbies Offline Posts: 33 Park City, UT Gender:	Re: Extremely Hot Pipe Reply #8 - 06/08/16 at 14:39:32 I have a point and shoot temp gun too. I will start a thread. I will measure 2 minutes after startup and after a 5 minute ride. Good base point??? With what I have described about my situation, do I run any risk of damaging my engine by riding my bike?
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Re: Extremely Hot Pipe
Reply #9 - 06/08/16 at 14:42:42

stewmills wrote on 06/08/16 at 13:46:26:

I have one of those gadgets and would be interested to see how hot I am (my wife says not very Grin

).

I don't think they read below zero. Grin

Quote:

Just need to know at what point to measure such as immediately after riding moderately for XX time and where on the pipe to measure.

You're gonna just have search around the pipe for a hot spot.
You'll need to be closer than normal so the spot you're reading all on the pipe.

And if you're looking for accuracy your barking up the wrong tree.

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Meme

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Re: Extremely Hot Pipe
Reply #10 - 06/08/16 at 17:06:56

hockmanjosh wrote on 06/08/16 at 14:39:32:

I have a point and shoot temp gun too.
I will start a thread. I will measure 2 minutes after startup and after a 5 minute ride. Good base point???

With what I have described about my situation, do I run any risk of damaging my engine by riding my bike?

.
If it's very lean, then yes, without enough fuel to burn, the tops of the pistons can burn. I doubt you are near that point though. Your best bet is to rejet the carb.

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Re: Extremely Hot Pipe
Reply #11 - 06/08/16 at 18:29:02

The question Verslagen asked is extremely important is the muffler stock or has the baffle been removed or a hole drilled in it?If you look through it and you can see any light it's not stock and this could be the cause of your overheating . You can repair the muffler by getting an automotive freeze plug and driving it down the muffler half way.If the muffler 's stock I would try a larger main jet ,but being you're at 7000ft I'd only go up one size from 145 to the next larger 147.5 Both these mod should be under $10 bucks.

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hockmanjosh YaBB Newbies Offline Posts: 33 Park City, UT Gender:	Re: Extremely Hot Pipe Reply #12 - 06/08/16 at 21:49:37 Do I want a 'small round' or a 'large round' main jet? Does it matter? If it does, what is the difference and why?
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hockmanjosh YaBB Newbies Offline Posts: 33 Park City, UT Gender:	Re: Extremely Hot Pipe Reply #13 - 06/09/16 at 10:44:00 The baffle has been drilled out! I can see directly through it. It's a straight pipe now. What should I do????
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Re: Extremely Hot Pipe
Reply #14 - 06/09/16 at 10:50:08

bingo

batman wrote on 06/08/16 at 18:29:02:

The question Verslagen asked is extremely important is the muffler stock or has the baffle been removed or a hole drilled in it?If you look through it and you can see any light it's not stock and this could be the cause of your overheating . You can repair the muffler by getting an automotive freeze plug and driving it down the muffler half way.If the muffler 's stock I would try a larger main jet ,but being you're at 7000ft I'd only go up one size from 145 to the next larger 147.5 Both these mod should be under $10 bucks.

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