gofast5 Posted July 6, 2010 Report Share Posted July 6, 2010 Well I'm kind of looking for some opinions on whats better a keihin 28mm pwk or a mikuni flat slide 28s? Also anyone know about boring/taper boring carbs. Benefits of both please?? Thanks! Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted July 6, 2010 Report Share Posted July 6, 2010 My stock carbs are bored out to 28mm and work great. I know other carbs will make more power, but boring mine only cost me 35 bucks apiece instead of 300 plus for Keihins.I really can't say how big of gain they gave me because I did a complete build all at once- ported cylinders, cut and chambered head,bored and ProLite pistons,ported stock reed cages with Boyesen reeds and the bored carbs were all done at the same time. Quote Link to comment Share on other sites More sharing options...
bansheesandrider Posted July 6, 2010 Report Share Posted July 6, 2010 One other advantage of boring stock carbs is you can walk into any Yamaha shop and get parts for them. Quote Link to comment Share on other sites More sharing options...
gofast5 Posted July 6, 2010 Author Report Share Posted July 6, 2010 I already have pwk 28s but have a friend who'd like to buy them and I had a shot at some mikuni 28s, I wasn't sure if one was much better then the other. I like my pwks but would like a little more topend power but want to keep the lowend I have so I was told If I taper bored it to a 30 Id gain topend and it would keep the velocity up giving me more bottem end. Quote Link to comment Share on other sites More sharing options...
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