Scottishguy Posted August 15, 2014 Report Share Posted August 15, 2014 Which kit is best Gytr 392 or serval 392 both without port? Cheers Quote Link to comment Share on other sites More sharing options...
MoronG Posted August 15, 2014 Report Share Posted August 15, 2014 I was told gytr no one runs that sht on here..jus saying Quote Link to comment Share on other sites More sharing options...
jriffe23 Posted August 15, 2014 Report Share Posted August 15, 2014 Serval or cub. Nothing else. Cheers Quote Link to comment Share on other sites More sharing options...
Scottishguy Posted August 15, 2014 Author Report Share Posted August 15, 2014 Decide on 392 serval midrange port stock stroke Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 15, 2014 Report Share Posted August 15, 2014 Gytr has big bore cylinders? Crazy. But get the serval. Quote Link to comment Share on other sites More sharing options...
NYUK Posted August 15, 2014 Report Share Posted August 15, 2014 may as well go 421. 1 Quote Link to comment Share on other sites More sharing options...
trickedcarbine Posted August 15, 2014 Report Share Posted August 15, 2014 This http://www.motosport.com/atv/2006-yamaha-banshee--GYTR-COMPLETE-BIG-BORE-KIT ? Looks like Athena to me. Quote Link to comment Share on other sites More sharing options...
Scottishguy Posted August 15, 2014 Author Report Share Posted August 15, 2014 Was just looking for that link Quote Link to comment Share on other sites More sharing options...
Scottishguy Posted August 15, 2014 Author Report Share Posted August 15, 2014 Read that +4 only gives 8 more hp but more reliabability issues, has to be reliable as it will be highway registered Quote Link to comment Share on other sites More sharing options...
Deadbeat Posted August 15, 2014 Report Share Posted August 15, 2014 the jugs and head have athena cast on them in that pic Quote Link to comment Share on other sites More sharing options...
Scottishguy Posted August 15, 2014 Author Report Share Posted August 15, 2014 Bit of dodgy false advertising there Quote Link to comment Share on other sites More sharing options...
Deadbeat Posted August 15, 2014 Report Share Posted August 15, 2014 Read that +4 only gives 8 more hp but more reliabability issues, has to be reliable as it will be highway registered i think the thousands of 4mm owners might disagree with you...where the fuck are you reading this Quote Link to comment Share on other sites More sharing options...
Scottishguy Posted August 15, 2014 Author Report Share Posted August 15, 2014 Ill need to look for it they has dyno sheets aswell comparing stock stroke to 4 mil What do you reckon The hp gain would be on serval 392 vs serval 421? Never built a banshee before so all help is appreciated Quote Link to comment Share on other sites More sharing options...
Scottishguy Posted August 15, 2014 Author Report Share Posted August 15, 2014 Found it my 8hp was an underestimate this is from red line Dune Port : This is by far the most popular port we do. It has a strong pull with no loss in bottom end. We raise the intake roof and lower floor. Cut transfer section of sleeve, major tunnel re-shaping and angling. Raise trans to correct duration for motor setup. Raise and re-shape exhaust port and tunnel. This port can be done to accommodate stock to plus 4mm strokes. This porting will be 65-75HP on stock stroke and 85HP+ with 4mm stroke with correct supporting parts. $400/pair Quote Link to comment Share on other sites More sharing options...
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