Hawk exhaust mod/hack complete - Page 2

Weldangrind · 08-22-2016, 12:46 PM

The cool thing is you could fabricate a few different designs and then try them to quantify the difference.

BlackBike · 08-22-2016, 03:05 PM

weld...rereading luna last comment and i thought of the dashed cut on the 4 edge too. i saw where you mentioned it. i am always trying to do something with least amount of work.(usually in too big a hurry and get punished and have to take the whole thing apart anyway

)

Weldangrind · 08-23-2016, 11:29 AM

As Spud is fond of saying, there's never enough time to do it right but there's always time to do it twice.

LunaTech · 08-23-2016, 03:30 PM

I am going to close the end off so the air flow goes through the drilled holes and add the wire mesh to make it legal for National Forests. I may redo the entire thing because I just went to Harbor Freight and purchased an 8 inch 5 speed drill press for $54 so now I can actually drill the holes straight and evenly spaced. Thanks for all the kind words and suggestions.

BTW I can tell a big difference in the speed and HP of the Hawk. K&N filter should be here tomorrow evening and I'm going to rejet when I put it in. I have a little bit of popping on deceleration now so I suspect it's a little lean after the exhaust job. I've already went to a 110 main so I'll try a 115 or 120. Pretty fun to be tinkering with a bike again. I had my old ZRX dialed in and all I ever did to it was ride.

Azhule · 08-23-2016, 03:34 PM

Might need to mess with the Adjustment Screws or go up a Pilot Jet size to cut down on the "Deceleration Popping", but a properly tuned engine with an "open exhaust" might make some 'decel popping' no matter how rich the carb is tuned

LunaTech · 08-23-2016, 04:25 PM

Quote:

Originally Posted by Azhule

Might need to mess with the Adjustment Screws or go up a Pilot Jet size to cut down on the "Deceleration Popping", but a properly tuned engine with an "open exhaust" might make some 'decel popping' no matter how rich the carb is tuned

Yea, I'm gonna take a gander at the plug and see if it tells me anything before I rejet.

BlackBike · 08-23-2016, 04:30 PM

You won't regret that bench top drill, you will find continuous uses with it. I bought a craftsman a few years ago and paid too much but have loved having it. It really is a cornerstone shop tool.

LunaTech · 08-23-2016, 05:06 PM

Quote:

Originally Posted by BlackBike

You won't regret that bench top drill, you will find continuous uses with it. I bought a craftsman a few years ago and paid too much but have loved having it. It really is a cornerstone shop tool.

Funny thing is I was in industrial maintenance for over 20 years until 5 years ago when I changed careers (sort of anyway). I worked in a machine shop and had access to every piece of equipment you could want. Since then I've been trying to put my home shop together. One piece at a time....

BlackBike · 08-23-2016, 08:10 PM

Quote:

Originally Posted by LunaTech

Funny thing is I was in industrial maintenance for over 20 years until 5 years ago when I changed careers (sort of anyway). I worked in a machine shop and had access to every piece of equipment you could want. Since then I've been trying to put my home shop together. One piece at a time....

I'm sure there were a few missing pieces that were permanently borrowed

Weldangrind · 08-23-2016, 11:17 PM

LT, I recommend that you try a 112.5 before a 115.

08-22-2016, 12:46 PM	#16
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	The cool thing is you could fabricate a few different designs and then try them to quantify the difference. __________________ 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

08-22-2016, 03:05 PM	#17
BlackBike Join Date: Feb 2016 Location: George West, Texas Posts: 4,097	weld...rereading luna last comment and i thought of the dashed cut on the 4 edge too. i saw where you mentioned it. i am always trying to do something with least amount of work.(usually in too big a hurry and get punished and have to take the whole thing apart anyway ) __________________ ***************************************** 2015 Bashan"Blaze" BS250GY-31 (DB-07K-250) GONE 2017 Suzuki V Strom 650 XT "We are all born ignorant, but one must work hard to remain stupid." ~Benjamin Franklin~
	1

08-23-2016, 11:29 AM	#18
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	As Spud is fond of saying, there's never enough time to do it right but there's always time to do it twice. __________________ 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
	1

08-23-2016, 03:34 PM	#20
Azhule Join Date: Dec 2015 Location: CO Posts: 1,525	Might need to mess with the Adjustment Screws or go up a Pilot Jet size to cut down on the "Deceleration Popping", but a properly tuned engine with an "open exhaust" might make some 'decel popping' no matter how rich the carb is tuned __________________ "Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P.
	0

08-23-2016, 04:30 PM	#22
BlackBike Join Date: Feb 2016 Location: George West, Texas Posts: 4,097	You won't regret that bench top drill, you will find continuous uses with it. I bought a craftsman a few years ago and paid too much but have loved having it. It really is a cornerstone shop tool. __________________ ***************************************** 2015 Bashan"Blaze" BS250GY-31 (DB-07K-250) GONE 2017 Suzuki V Strom 650 XT "We are all born ignorant, but one must work hard to remain stupid." ~Benjamin Franklin~
	1

08-23-2016, 03:30 PM	#19
LunaTech Join Date: Jul 2016 Location: Jonesville, NC Posts: 136	I am going to close the end off so the air flow goes through the drilled holes and add the wire mesh to make it legal for National Forests. I may redo the entire thing because I just went to Harbor Freight and purchased an 8 inch 5 speed drill press for $54 so now I can actually drill the holes straight and evenly spaced. Thanks for all the kind words and suggestions. BTW I can tell a big difference in the speed and HP of the Hawk. K&N filter should be here tomorrow evening and I'm going to rejet when I put it in. I have a little bit of popping on deceleration now so I suspect it's a little lean after the exhaust job. I've already went to a 110 main so I'll try a 115 or 120. Pretty fun to be tinkering with a bike again. I had my old ZRX dialed in and all I ever did to it was ride.
	0

08-23-2016, 11:17 PM	#25
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	LT, I recommend that you try a 112.5 before a 115. __________________ 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
	1