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Main Area => General GS500 Discussion => Topic started by: ATLRIDER on March 29, 2012, 02:42:21 PM

Title: Stock exhaust midpipe size and jetting
Post by: ATLRIDER on March 29, 2012, 02:42:21 PM
Hi guys,

Swapping from a 93' stock exhaust to an 06' stock exhaust.  Midpipes are different diameters.

93' = 45mm
06' = 54mm

Matrix states 40/125 with stock filter for 89-2000 model years. Has anyone tried to fit the new, larger diameter pipe and use the above jetting with success?

I'm thinking it may run a tad lean with the bigger midpipe but wanted to chime in before going up in main jet size.

Thanks.
Title: Re: Stock exhaust midpipe size and jetting
Post by: jestercinti on March 29, 2012, 03:02:22 PM
Should not make a huge difference between the years, but you bring up a good point.

I'd start with the matrix as a baseline and adjust if necessary.  Whatever you do, let us know the results.  I'm sure someone will have this same problem in the future.
Title: Re: Stock exhaust midpipe size and jetting
Post by: ATLRIDER on March 29, 2012, 03:20:42 PM
I'm hoping it doesn't need more than a 125 cause that's the biggest I've got within the range.  Next biggest I've got is 140, 147.5, & 150's