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#11877 kdavid (User) Fresh Boarder Posts: 31 big bore kit 2 Years, 1 Month ago   i have been thinking about doing the big bore kit to my bike. bigger pistons ported heads flatside carb. already have ported manifold dyna 3000 pipes rejetted and it runs real good now but always looking for more power. dont want to loose the reliabilty so dont want to go full bore with cams and such but what about bigger valves? anyone have the kit already and how do you like the difference? thinking about using patric racing parts. any info would be helpfull and how much the labor was it to get it done. i have a 05 midnight star   Logged     happy trails ride fast take chances   The administrator has disabled public write access. #11878 Envinyatar (User) It's not "what" you ride, it's "that" you ride. Junior Boarder Posts: 148 Re:big bore kit 2 Years, 1 Month ago   According to the Sppedstar catalog, the racing heads come with the "stock valvetrain". They don't even throw in the Speedstar valvesprings, you have to buy them separate. Basically, Yamaha had them ported and polished for better airflow but used regular valves. Don't know about thet Patrick stuff though.   Logged     The administrator has disabled public write access. #11885 Big Al (User) Junior Boarder Posts: 129 Re:big bore kit 2 Years, 1 Month ago   As far as I know, the Patrick Racing valve job is porting and using the stock valve train. The springs and larger valves are a separate purchase. You should contact them to get the details...   Logged     Keep on ridin, Semper Fi   The administrator has disabled public write access.

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