foxrider603 Posted March 4, 2013 Report Share Posted March 4, 2013 So i got a call from the shop who is rebuilding my banshee that i bought 2 weeks ago that i thought was a 350 come to find out that its running a 421 stroker not sure of the brand my question is other then the power gain is therr any other advantages to running this set up . Im also running a 2 into 1 carb , stage 3 boysen reeds and full fmf exhaust Quote Link to comment Share on other sites More sharing options...
foxrider603 Posted March 4, 2013 Author Report Share Posted March 4, 2013 He would have no reason to lie to me not only have i been taking my quads to him for years but he's a good personal friend Quote Link to comment Share on other sites More sharing options...
locogato11283 Posted March 4, 2013 Report Share Posted March 4, 2013 421 stroker huh? So it's got a 68mm bore? Are they stock cylinders? Quote Link to comment Share on other sites More sharing options...
HolySheet Posted March 4, 2013 Report Share Posted March 4, 2013 421 stroker huh? So it's got a 68mm bore? Are they stock cylinders? Is possible. All I need is a 4 mill crank and my stocker is a 421. Quote Link to comment Share on other sites More sharing options...
HolySheet Posted March 4, 2013 Report Share Posted March 4, 2013 So your stocker also has a 68mm bore? Yes. I wish it was smaller but it's not. Quote Link to comment Share on other sites More sharing options...
HolySheet Posted March 4, 2013 Report Share Posted March 4, 2013 Stock cylinder 68mm bore. Quote Link to comment Share on other sites More sharing options...
HolySheet Posted March 4, 2013 Report Share Posted March 4, 2013 Someone at a machine shop bored them to 68mm. Stockers can go to 68.25mm if I remember right. Quote Link to comment Share on other sites More sharing options...
n2otoofast4u Posted March 4, 2013 Report Share Posted March 4, 2013 There are setups that use stock cylds with a 68 bore. Not as common now as years ago before the flood of aftermarket cylds but there are some out there. And by all rights there are setups out there that are stock cylds with much larger bores than 68. Quote Link to comment Share on other sites More sharing options...
dajogejr Posted March 4, 2013 Report Share Posted March 4, 2013 That would be 66.50.Which would give you around 370cc's More than 370 if he's got a 4 mill in it.. Little Stevie Sent from my Nexus 10 using Tapatalk HD Quote Link to comment Share on other sites More sharing options...
HolySheet Posted March 5, 2013 Report Share Posted March 5, 2013 Yes, stock stroke 68mm bore. Stock cylinders. 392cc Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted March 5, 2013 Report Share Posted March 5, 2013 Lotta sleeved stockers out there. My stock cyl big bore 4mm was 440cc's Quote Link to comment Share on other sites More sharing options...
HolySheet Posted March 6, 2013 Report Share Posted March 6, 2013 I am curious as to how much I can bore with it being at 68mm. I don't know how much life is left in them. Quote Link to comment Share on other sites More sharing options...
HolySheet Posted March 6, 2013 Report Share Posted March 6, 2013 Wiesco Pro Lites. 66.55mm. Quote Link to comment Share on other sites More sharing options...
oldskool Posted March 7, 2013 Report Share Posted March 7, 2013 Wiesco Pro Lites. 66.55mm. What kinda compression you gettin with that set-up Quote Link to comment Share on other sites More sharing options...
HolySheet Posted March 7, 2013 Report Share Posted March 7, 2013 135psi in each. Quote Link to comment Share on other sites More sharing options...
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