Customizing my Hawk - Page 4

pcspecialist · 07-18-2016, 08:44 PM

Pretty much finalized my exhaust mods so I've copied over all the info from another thread. I had already decatitated the exhaust and drilled holes in the muffler, but, didn't notice much of a power gain so I decided to increase the opening on the end of the muffler by replacing the stock insert with a Pro Circuit one (which is a bolt in replacement). It doesn't fall flat on it's face past 6K RPMs like it used to so I'm now shifting at 8K RPM (when trying to get up to speed quickly) and can really feel it pull with EVERY shift. I could do 55MPH comfortably all day long, even sustaining 60MPH is no problem at all if not fighting a wind.

Drilled holes inside muffler with a long bit I have for running cables to reduce back pressure. The plate inside the muffler is further away than the zoom lens make it look like. Probably too many holes, wish I had used the larger insert instead of stock one when I was test driving between hole drilling (there are more than you see in the picture).

With the insert installed

Here it is all polished up:

This is the insert I purchased, but, what I received does not protrude into the muffler so I won't be able to hose-clamp a screen on the inside as I wanted.
http://www.amazon.com/gp/product/B001654JK0

Code:

don't know why it keeps changing it to amazon.ca (where you can't even get it) here's the url you need: http://www.amazon.com/gp/product/B001654JK0

pcspecialist · 07-18-2016, 08:48 PM

Polished it up with Wenol and aluminum foil:

Here's the back side:

I could possibly screw screen to the inside of the muffler:

Weldangrind · 07-19-2016, 11:43 AM

I bet there is a thin piece of stainless tube that would slip right over the existing tube, between the tube and the flange. It could then be welded in place, allowing you to attach screen.

2LZ · 07-19-2016, 12:10 PM

Maybe I'm missing something here....but why not just cut a round hunk of screen the same size as your muffler and sandwich it between the nozzle and the muffler on the three mounting screws?

I should have probably read back further..... Apologies if I missed something.

pcspecialist · 07-19-2016, 01:07 PM

Quote:

Originally Posted by 2LZ

why not just cut a round hunk of screen the same size as your muffler and sandwich it between the nozzle and the muffler on the three mounting screws

for the same reason filters for garden hoses and washing machine hoses are not flat, but, instead are dome shaped..... flat would restrict air flow. Need more surface area.

2LZ · 07-19-2016, 01:42 PM

Quote:

Originally Posted by pcspecialist

for the same reason filters for garden hoses and washing machine hoses are not flat, but, instead are dome shaped..... flat would restrict air flow. Need more surface area.

Understood....but is there anything preventing someone from forming a dome? Screen bends. Just cut a larger disk, make the dome, sandwich it together, then trim off the excess?
Kind of like a sombrero?

Just thoughts is all......... It looks like something simple has to be workable.

pcspecialist · 07-19-2016, 02:24 PM

I think it would be difficult to get a seal..... maybe with a gasket on either side of the screen.

Weldangrind · 07-20-2016, 11:34 AM

Quote:

Originally Posted by pcspecialist

I think it would be difficult to get a seal..... maybe with a gasket on either side of the screen.

Or a flange cut from steel.

paulesmann · 07-22-2016, 02:49 AM

Man I haven't been on for a minute. Your hawk is looking SICK man!!

kohburn · 07-22-2016, 08:04 AM

it would be getto as fk but you could cut a tin can and roll it to the right size you jam between the pipe and flange as a pipe extension, then wire tie a screen cone onto that.

not sure how hot that exhaust tip gets but maybe could use some high temp solder to hold it in place.

pcspecialist · 07-22-2016, 08:19 AM

Quote:

Originally Posted by paulesmann

Man I haven't been on for a minute.

We should do Larch Mountain this weekend

MDStroup · 07-24-2016, 07:46 PM

Your hawk looks awesome. Can we get an updated full bike picture?

pcspecialist · 07-30-2016, 05:15 PM

I've posted a bunch of pictures of it on facebook:
https://www.facebook.com/media/set/?...1&l=db3d5e2b09

MDStroup · 07-30-2016, 10:31 PM

Quote:

Originally Posted by pcspecialist

I've posted a bunch of pictures of it on facebook:
https://www.facebook.com/media/set/?...1&l=db3d5e2b09

Thank you for the link. The bike looks great! I hope you get many years of enjoyment out of her.

hertz9753 · 07-31-2016, 12:06 AM

pc doesn't want to be my friend on FB. Maybe the Michael thing confused him?

07-18-2016, 08:44 PM	#46
pcspecialist Join Date: May 2016 Posts: 583	Pretty much finalized my exhaust mods so I've copied over all the info from another thread. I had already decatitated the exhaust and drilled holes in the muffler, but, didn't notice much of a power gain so I decided to increase the opening on the end of the muffler by replacing the stock insert with a Pro Circuit one (which is a bolt in replacement). It doesn't fall flat on it's face past 6K RPMs like it used to so I'm now shifting at 8K RPM (when trying to get up to speed quickly) and can really feel it pull with EVERY shift. I could do 55MPH comfortably all day long, even sustaining 60MPH is no problem at all if not fighting a wind. Drilled holes inside muffler with a long bit I have for running cables to reduce back pressure. The plate inside the muffler is further away than the zoom lens make it look like. Probably too many holes, wish I had used the larger insert instead of stock one when I was test driving between hole drilling (there are more than you see in the picture). With the insert installed Here it is all polished up: This is the insert I purchased, but, what I received does not protrude into the muffler so I won't be able to hose-clamp a screen on the inside as I wanted. http://www.amazon.com/gp/product/B001654JK0 Code: don't know why it keeps changing it to amazon.ca (where you can't even get it) here's the url you need: http://www.amazon.com/gp/product/B001654JK0 Last edited by pcspecialist; 09-02-2016 at 01:25 PM.
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07-19-2016, 11:43 AM	#48
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I bet there is a thin piece of stainless tube that would slip right over the existing tube, between the tube and the flange. It could then be welded in place, allowing you to attach screen. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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07-19-2016, 12:10 PM	#49
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,081	Maybe I'm missing something here....but why not just cut a round hunk of screen the same size as your muffler and sandwich it between the nozzle and the muffler on the three mounting screws? I should have probably read back further..... Apologies if I missed something. __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	1

07-22-2016, 02:49 AM	#54
paulesmann Join Date: Jan 2016 Location: Portland, OR Posts: 76	Man I haven't been on for a minute. Your hawk is looking SICK man!! __________________ Paul Mann 2015 Haosen Hawk 1989 Kawasaki EX500 1991 Suzuki DR350
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07-22-2016, 08:04 AM	#55
kohburn Join Date: Dec 2015 Location: Coastal NC Posts: 537	it would be getto as fk but you could cut a tin can and roll it to the right size you jam between the pipe and flange as a pipe extension, then wire tie a screen cone onto that. not sure how hot that exhaust tip gets but maybe could use some high temp solder to hold it in place. __________________ -whatever you do, just be awesome. - 2008 Kawasaki Versys - 2016 CSC TT250
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07-18-2016, 08:48 PM	#47
pcspecialist Join Date: May 2016 Posts: 583	Polished it up with Wenol and aluminum foil: Here's the back side: I could possibly screw screen to the inside of the muffler:
	1

07-19-2016, 02:24 PM	#52
pcspecialist Join Date: May 2016 Posts: 583	I think it would be difficult to get a seal..... maybe with a gasket on either side of the screen.
	1

07-24-2016, 07:46 PM	#57
MDStroup Join Date: Apr 2016 Location: Chesapeake, VA Posts: 207	Your hawk looks awesome. Can we get an updated full bike picture?
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07-30-2016, 05:15 PM	#58
pcspecialist Join Date: May 2016 Posts: 583	I've posted a bunch of pictures of it on facebook: https://www.facebook.com/media/set/?...1&l=db3d5e2b09
	1

07-31-2016, 12:06 AM	#60
hertz9753 Join Date: May 2016 Location: Bismarck, ND Posts: 868	pc doesn't want to be my friend on FB. Maybe the Michael thing confused him? __________________ 2015 and 3/4 RPS Hawk 250. Most people would call it a 2016 but the MCO didn't.
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