bwflorence Posted July 21, 2009 Share Posted July 21, 2009 Hi again, Thanks for the help with the yoshi/PC3 question. So, I figured, if im going to change the exhaust and ECU then what else could I do to eek out more power from the bird. I have a fairly limited budget (maybe 3 grand) and I dont really want to touch the bottom end. I was considering a port and polish and bigger cams. Is this a good option or are there better ones ?? Bernie Quote Link to comment Share on other sites More sharing options...
XX4me Posted July 27, 2009 Share Posted July 27, 2009 Not sure how much increase you'd see with cams and a port and polish, maybe 8 horses? Nitrous would be more cost effective. You could slap on 20 pretty easy. Quote Link to comment Share on other sites More sharing options...
BCBird Posted July 27, 2009 Share Posted July 27, 2009 Not sure how much increase you'd see with cams and a port and polish, maybe 8 horses? Nitrous would be more cost effective. You could slap on 20 pretty easy. Would the above affect the daily "rideability" of the Bird? Quote Link to comment Share on other sites More sharing options...
brianmacza Posted July 27, 2009 Share Posted July 27, 2009 I did a port&polish on my old CB900F a good number of years ago... with uprated carbs (Mikuni 36MM smoothbores) and dgreed cams, plus a Yoshi 4 into 2 system that was used on the AMA bikes at the time it was dynod at 135hp (from stock 92ph). After the big bore kit was done that was boosted to about 145. Then the #3 big end went and fucked the casings up completely... The point is that an XX with proper fuelling and exhaust, flowed ports and sorted cams should do mor than 8hp - with the above I'd be surprised if you didn't get way better than 20 as a reliable engine. Quote Link to comment Share on other sites More sharing options...
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