FASTOYS Posted March 16, 2010 Report Share Posted March 16, 2010 Just got the results, 34 trq/65 hp 421 Vito 4mm motor w/CPI pipes. Im sorry but im out. Our play port 350s make more than that anytime!! Im sure i can get more power out of them by porting them but why spend the money on them when a Play port or the Cub will do more out of the box? Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted March 16, 2010 Report Share Posted March 16, 2010 im not looking for a drag port either. my cylinders now are ported by r&b racing out of mich. im working on building my other bike up now, so thats why im looking into big bore kits, ect. a couple guys say that the vito's big bore is a good all around engine kit. great for the dunes with alot of good usable power. and like i said above, with a little port clean up you can see even better results out of it. so thats what im trying to ask if the big bore kit is a notch up from a good port job with a little work? just trying to get some more opinions before i jump on buying it. Yea you can spend the 500 for the cylinders then pay some one another 300 for port work. Or you could buy a 4 mill crank and have your stock cylinders ported and have a way better engine. I would do a ported 4 mill over a pair of ported vito's cylinders. Quote Link to comment Share on other sites More sharing options...
- DUNNY - Posted March 16, 2010 Author Report Share Posted March 16, 2010 thanks guys for all the input. i was just hoping to get some more power without having to split the cases and go 4 mill in this bike. i really dont have the time for that. and figure it will be a decent amount to have it done. Quote Link to comment Share on other sites More sharing options...
FASTOYS Posted March 16, 2010 Report Share Posted March 16, 2010 You dont have to have a 4mm to make power!!! At least we dont. Quote Link to comment Share on other sites More sharing options...
blowit Posted March 16, 2010 Report Share Posted March 16, 2010 Just got the results, 34 trq/65 hp 421 Vito 4mm motor w/CPI pipes. Im sorry but im out. Our play port 350s make more than that anytime!! Im sure i can get more power out of them by porting them but why spend the money on them when a Play port or the Cub will do more out of the box? I think your dyno is broke Jeff.. Did you get a chance to inspect the port layout and timings? I cannot imagine them stepping too far off the already proven path but who knows. I might suspect tire slip with those dyno numbers but usually torque will go up somewhere. I would be straight pissed with those numbers on a 421... Hell, our 421 stock cylinder stuff will spank that hard! huh. Quote Link to comment Share on other sites More sharing options...
FASTOYS Posted March 16, 2010 Report Share Posted March 16, 2010 Not our dyno. It was at LS in Waynoka and it reads very close. Yeah i hear ya. Quote Link to comment Share on other sites More sharing options...
BANSHEE HP Posted March 17, 2010 Report Share Posted March 17, 2010 stock carbs into dragported cylinder into cpi pipe that just dont sound right prolly why the number dont look good. Quote Link to comment Share on other sites More sharing options...
EvilBanshee Posted July 28, 2010 Report Share Posted July 28, 2010 Just got the results, 34 trq/65 hp 421 Vito 4mm motor w/CPI pipes. Im sorry but im out. Our play port 350s make more than that anytime!! Im sure i can get more power out of them by porting them but why spend the money on them when a Play port or the Cub will do more out of the box? You cant make horse power out of a 421 with stock 28mm carbs bud. Let the thing breath and you will see big numbers. Quote Link to comment Share on other sites More sharing options...
mopar1rules Posted July 29, 2010 Report Share Posted July 29, 2010 You cant make horse power out of a 421 with stock 28mm carbs bud. Let the thing breath and you will see big numbers. just to clarify, stock carbs aren't 28mm, they are 26mm. Quote Link to comment Share on other sites More sharing options...
SLORYDER Posted July 29, 2010 Report Share Posted July 29, 2010 I bet your rings would last a lot longer on the vitos cylinder than a 65hp stock cylinder I would also like to know what the port timings are. Quote Link to comment Share on other sites More sharing options...
EvilBanshee Posted July 29, 2010 Report Share Posted July 29, 2010 just to clarify, stock carbs aren't 28mm, they are 26mm. Oh, well thats even!! those big engines cant breath by sucking through a straw!! I have the big bore 404 kit, and the 421 kit on order. These engines wake up huge when you throw a propper size carb on them. Iv raced many tweeked out 350's. I destroy them from 2nd gear on, i pull away like nothing. Quote Link to comment Share on other sites More sharing options...
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