Gytr or serval

[Scottishguy]

Which kit is best

Gytr 392 or serval 392 both without port?

Cheers

[MoronG]

I was told gytr no one runs that sht on here..jus saying

[jriffe23]

Serval or cub. Nothing else. Cheers

[Scottishguy]

Decide on 392 serval midrange port stock stroke

[trickedcarbine]

Gytr has big bore cylinders? Crazy. But get the serval.

[NYUK]

may as well go 421.

[trickedcarbine]

This http://www.motosport.com/atv/2006-yamaha-banshee--GYTR-COMPLETE-BIG-BORE-KIT ?

Looks like Athena to me.

[Scottishguy]

Was just looking for that link

[Scottishguy]

Read that +4 only gives 8 more hp but more reliabability issues, has to be reliable as it will be highway registered

[Deadbeat]

the jugs and head have athena cast on them in that pic

[Scottishguy]

Bit of dodgy false advertising there

[Deadbeat]

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

[Scottishguy]

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

[Scottishguy]

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