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Re-Jetting suggestions? 541cc overbore with K&N and pipes.

Started by 5thAve, January 12, 2009, 08:05:44 PM

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5thAve

January 12, 2009, 08:05:44 PM
My winter rebuild will include boring the cylinders to 541cc with the 78mm Wiseco Kawasaki pistons mentioned by Dgyver here: http://gstwins.com/gsboard/index.php?topic=14401.msg123943#msg123943

Assuming I also go to a K&N lunchbox and aftermarket exhaust, can anyone here who's run a 541 suggest a starting point for my re-jetting?  :icon_question:

GS500EM currently undergoing major open-heart surgery.
Coming eventually: 541cc with 78mm Wiseco pistons; K&N Lunchbox; Vance & Hines; 40 pilot / 147.5 main jets; Progressive fork springs; 15W fork oil; Katana 750 shock

VFR750FM beautifully stock.
XV750 Virago 1981 - sold
XL185s 1984 - sold

dgyver

#1
January 13, 2009, 06:00:46 AM
In my 541... I was running 147.5 mains but they were in 36mm carbs along with Megacycle cams.
Common sense in not very common.

5thAve

#2
January 13, 2009, 06:10:58 AM
Okay, well that's a start.  Thanks dgyver.  I'm planning to try stock carbs and head, including cams, for now.

Any other opinions?    :dunno_white:
GS500EM currently undergoing major open-heart surgery.
Coming eventually: 541cc with 78mm Wiseco pistons; K&N Lunchbox; Vance & Hines; 40 pilot / 147.5 main jets; Progressive fork springs; 15W fork oil; Katana 750 shock

VFR750FM beautifully stock.
XV750 Virago 1981 - sold
XL185s 1984 - sold

Danny500

#3
January 13, 2009, 04:27:46 PM
Trial and error :)  :cheers:

Dan
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