$24 exhaust = 104 db - Page 3

hect75 · 03-09-2015, 05:20 PM

Quote:

Originally Posted by Mudflap

I use stainless steel scouring pads from the grocery store. Lasts forever.

BTW Reducing the size of the outlet slightly makes a big difference in sound level.

Only use the scouring pads or with packing as well? I found a thread about scouring pads on this forum (below) and both are used.

http://www.suzukicentral.com/forums/...r-exhaust.html

Mudflap · 03-09-2015, 05:23 PM

I use scouring pads alone. Can't tell any difference in sound.

jct842 · 03-09-2015, 10:18 PM

The only motorcycle road test I ever took was in Il. in late 60's. I brought in a 250cc greeves trials bike with an expansion chamber in back of truck. Way too loud to get by so I stuffed it full of course steel wool with a screw driver. Was the last year you could get that bike licensed in Il. so it had a legal plate on it. It ran like crap with the wool inside there but I had no problems passing the driving test. took only about a day to blow it all back out. I liked that bike, it had the weird forks on front and was easy to roll it over a log or telephone pole laying in the dirt. john

Weldangrind · 03-10-2015, 12:34 AM

Was it a Greeves Scottish?

jct842 · 03-10-2015, 01:41 AM

I am not sure the exact model anymore. It was a 68 and had a cobled on tail light from a bsa and a head light, the bike shop just told me it was a trials model. Believe the forks were reverse earls, any way had a mostly horizontal bar that ran from one side of front axle to the other around the back of the wheel and what looked to be rear shocks/springs on the front. Not good handling on blacktop but the best I had ever rode with on dirt. No terrain was too much for the front end. It had the round cyl where the moto-cross model had a square head and cyl. john

hect75 · 03-15-2015, 08:33 PM

Finally, the exhaust is ready. Although I have a dremel 3000 and circular saw, I used the hacksaw to make straight cuts (well, I tried at least). The oricginal size was 45 cm and cut about 15 or 16 cm of pipe.

First, I marked the pipe and used the clamp for straigh cuts. The first cut was 6 cm long and the second 10 cm.

Second, each section was cut vertically around 1.5 cm for fitting into the pipe (don´t have pics).

Third, used 8 scouring pads and asembled the whole exhaust and rivet

Before cutting the exhaust (didn´t like the lenght)

After (looks better)

I bought a mainjet dynojet 142 equal to mikuni 132.5 size (according to a motorcycle forum) but will do the plug chop once the cold front let me ride.

Weldangrind · 03-16-2015, 01:19 AM

That short muffler looks good.

SpudRider · 03-16-2015, 10:23 PM

Indeed, you did a nice job.

03-10-2015, 12:34 AM	#34
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Was it a Greeves Scottish? __________________ 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
	0

03-15-2015, 08:33 PM	#36
hect75 Join Date: Mar 2014 Location: Mexico Posts: 134	Finally, the exhaust is ready. Although I have a dremel 3000 and circular saw, I used the hacksaw to make straight cuts (well, I tried at least). The oricginal size was 45 cm and cut about 15 or 16 cm of pipe. First, I marked the pipe and used the clamp for straigh cuts. The first cut was 6 cm long and the second 10 cm. Second, each section was cut vertically around 1.5 cm for fitting into the pipe (don´t have pics). Third, used 8 scouring pads and asembled the whole exhaust and rivet Before cutting the exhaust (didn´t like the lenght) After (looks better) I bought a mainjet dynojet 142 equal to mikuni 132.5 size (according to a motorcycle forum) but will do the plug chop once the cold front let me ride. __________________ Hector Mountrack Vento 2006
	0

03-16-2015, 01:19 AM	#37
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	That short muffler looks good. __________________ 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
	0

03-16-2015, 10:23 PM	#38
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	Indeed, you did a nice job. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
	0

03-09-2015, 05:23 PM	#32
Mudflap Join Date: Sep 2014 Posts: 1,870	I use scouring pads alone. Can't tell any difference in sound.
	0

03-09-2015, 10:18 PM	#33
jct842 Join Date: Jan 2015 Location: arkansas Posts: 297	The only motorcycle road test I ever took was in Il. in late 60's. I brought in a 250cc greeves trials bike with an expansion chamber in back of truck. Way too loud to get by so I stuffed it full of course steel wool with a screw driver. Was the last year you could get that bike licensed in Il. so it had a legal plate on it. It ran like crap with the wool inside there but I had no problems passing the driving test. took only about a day to blow it all back out. I liked that bike, it had the weird forks on front and was easy to roll it over a log or telephone pole laying in the dirt. john
	0

03-10-2015, 01:41 AM	#35
jct842 Join Date: Jan 2015 Location: arkansas Posts: 297	I am not sure the exact model anymore. It was a 68 and had a cobled on tail light from a bsa and a head light, the bike shop just told me it was a trials model. Believe the forks were reverse earls, any way had a mostly horizontal bar that ran from one side of front axle to the other around the back of the wheel and what looked to be rear shocks/springs on the front. Not good handling on blacktop but the best I had ever rode with on dirt. No terrain was too much for the front end. It had the round cyl where the moto-cross model had a square head and cyl. john
	0