I searched. I really did. Lots of rejetting posts. Lots of Yoshimura. But not that many of both.
Does Youshimura call for 40/125 and pods? Does it have to be pods?
Jenya
Take a look here.
http://cgi.stanford.edu/~sanjayd/gs500/Upgrades/Rejetting
James
I would suggest this (http://www.ajusa.com/cgi-bin/knfilters/details?part_num=RU-2970&ajr_skey=e839485e6558d2ab77c5db4e9f8f14c8) filter.
According to the chart on the wiki, with that filter and the exhaust you would want to use 150 mains, 40 pilots, 2 washers under the needle, and 3 turns out on the mixture screw.
Perhaps I don't know how to read that table, but first of all I don't even see the line for Yoshi exhaust.
According to the table, V&H(f) with UniF calls for 40/127.5, 2 washers, 3 tunrs.
I don't know if the the recommendation for V&H translates directly for Yoshi though.
Jenya
The table is somewhat confusing... basically you want to rejet for a full exhaust, which would be the 'V&H(s)' or the upper end of 'perf', and which ever filter you decide to use. The one I suggested would be the best performance increase and is described as 'K&N(s)'. Going with that filter, I'd say your best bet would be the bottom row in that chart.
V&H(s) is 'full'? I thought that 's' stands for 'slip on' and 'f' would be 'full'
BTW, I already ordered that K&N you suggested. Thanks.
Hmmm... I didn't even notice that. I think you're right, but that line is also using the stock airbox, which is why it's only a 127.5 main. Go with the line that says 'perf' exhaust then with 150 mains. From what I've read, 150 mains with a lunchbox filter and a slipon is kinda rich up top, so you should be fine with that jetting and a full exhaust. All in all, exhaust makes very little difference compared to the filter.
Maybe someone else can say better.
This person used 40/150 on full Yoshi and reported that it runs on the rich side - http://gstwins.com/gsboard/index.php?topic=10926.0
So I though that maybe I should order few different sizes and experiment.
Say, a couple of 150s, 142.5 and 137.5? They are $3.50 at Sudco, so I will be, effectively, throwing away $14 on the pair that doesn't end up being used, but buying the limited freedom of experimentation.
Jenya
Hey Jenya... What year is your GS?
'93. One of those Italian Red with lame pink stripes.