Rejetting with new exhaust?

Started by k_kuz, April 28, 2003, 07:46:41 AM

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k_kuz

April 28, 2003, 07:46:41 AM
I have a Mac 4-2 exhaust I have installed on my bike. It seems to be running a bit lean now. Anyone have any experience with after market exhaust and/or any suggestions for rejetting? Thanks!
So they said "An old, heavy, shaft-drive, liquid cooled, V-twin race bike? Are you crazy!?"

Rick G

#1
April 28, 2003, 10:18:55 PM
MAC states the no rejetting is needed, My MAC is running with stock jetting . You could go one size   which for an 82 is 122.5 front and 127.5 rear
Rick G
Go soothingly on the grease mud, as there in lurks the skid demon
'82.5 Yamaha XZ550 RJ  Vision,
'90 Suzuki VX800, 1990 Suzuki DR350.
'74  XL350   Honda , 77 XL350 Honda, 78 XL350 Honda, '82 XT 200 Yamaha, '67 Yamaha YG1TK, 80cc trail bike

k_kuz

#2
April 29, 2003, 11:04:23 AM
Thanks, I appreciate it!
So they said "An old, heavy, shaft-drive, liquid cooled, V-twin race bike? Are you crazy!?"

Rick G

#3
April 29, 2003, 08:05:27 PM
I didn't make it very clear , sorry. the numbers I gave you are the stock sizes . you could go up 1 size to richen it up a bit
Rick G
Go soothingly on the grease mud, as there in lurks the skid demon
'82.5 Yamaha XZ550 RJ  Vision,
'90 Suzuki VX800, 1990 Suzuki DR350.
'74  XL350   Honda , 77 XL350 Honda, 78 XL350 Honda, '82 XT 200 Yamaha, '67 Yamaha YG1TK, 80cc trail bike

jasonm.

#4
May 04, 2003, 06:38:58 AM
One size would be 125 frt. and 130 rear. Also maybe only the low speed screws may need a slight adjustment.
looks aren't important, if she lets you play by your rules

Cdnlouie

#5
May 04, 2003, 10:41:59 PM
If your bike seems to be running a bit lean it probably has dirty carbs.  Stock main jet settings work great with MAC.  The pilot settings can be changed to the 130-135 range with good results.
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