Complete Stage IV + Big Bore Kit - Road Star Warrior Forum : Yamaha Star Warrior Forums

activeyear · 12-31-2012, 09:16 PM

I'm sure this has been asked so a direct to thread would be Great.......... I purchased my 2002 Warrior New, Northern Ohio, and like many others, after much waiting was able to have a complete Stage IV kit installed. Since I still love the looks and power, 97-98hp on Dyno three times, was thinking of having Patrick or other Big Bore Kit installed. With the complete Stage IV kit do I need to change anything else? If yes what? Thank you

Jbat · 12-31-2012, 09:22 PM

If you go big bore have head work done (porting) while your at it. And if you really want to go big have oversized valves installed

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07midnight57 · 12-31-2012, 11:36 PM

Technically it woudn't be full stage 4 without the pistons

. Going big bore you lose the Yami pistons. But you gain more hp and tq so call it Stage "whatever the h3ll I want" lol!!

Jbat · 01-01-2013, 12:53 AM

I like to call it stage 9.58...because if your bike makes 110 hp and 135 tq who's gonna argue?

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iowawarrior · 01-01-2013, 06:46 PM

i think with a 108 kit you can keep your cylinders. with a 110 you have to get new ones. and bigger pistons. you probably keep the cams and i assume the ECU.

Jbat · 01-01-2013, 08:10 PM

You don't have to eat rid of your cylinders with either. The 108 you can do two ways, either have your cylinders stripped, bored, and replated. Or have a cast iron sleeve out in them that is the 108 bore. Because of how much cylinder has to be removed to go to the 110 the only way you can do it is to have the cast sleeve put in. But the sleeves are installed in what was originally your stock cylinder. And of course keep your cams and ECU and everything else. Unless of course you want to sell them to me on the cheap...

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activeyear · 01-06-2013, 03:18 PM

Well it sound like the best thing to do utilizing my already installed Stage IV components is to dumb the Stage IV pistons, then send my cylinder out to have them bored out to 108ci and re-plated. Maybe spending a little more and have the heads ported and polished. Is it worth the $900.00+ ,cost vs hp gain, to have the heads done? I thank you for your input regarding my questions.

Luv2LafMcc · 01-06-2013, 03:48 PM

This is the single area of mods that i still cant seem to get a grip on how/what to do...

Jbat · 01-06-2013, 08:11 PM

If your gonna do the big bore, it's def worth doing the head work IMO. Even a stock bore can benefit greatly from having headwork done. Just make sure its done by someone that knows warriors (i.e Patrick Racing) as porting is easy to screw up if you don't know what your doing and you can make it worse instead of better. Bottom line-It's worth it.

Luv2laf-if you have any questions ask away. These motors can really wake up with a little (or alot) of cash put into em.

rocketkid · 01-06-2013, 11:45 PM

Noob question for sure, but how reliable is the 108 kit? I'm coming from a sportbike background (like a lot of you) and that power craving doesn't wear off quick, lemme tell 'ya. Still kinda on the fence (about "cruisers" in general) but just can't, won't and never will see paying almost 20 large for a VROD. The air-cooled mill on the Warrior makes me wonder 'bout reliability, period. Sorry, hope I don't come off sounding like an uneducated squid or something.

12-31-2012, 09:16 PM	#1 (permalink)
activeyear Member Join Date: Apr 2003 Location: Ohio Posts: 59	Complete Stage IV + Big Bore Kit I'm sure this has been asked so a direct to thread would be Great.......... I purchased my 2002 Warrior New, Northern Ohio, and like many others, after much waiting was able to have a complete Stage IV kit installed. Since I still love the looks and power, 97-98hp on Dyno three times, was thinking of having Patrick or other Big Bore Kit installed. With the complete Stage IV kit do I need to change anything else? If yes what? Thank you

12-31-2012, 09:22 PM	#2 (permalink)
Jbat Senior Member Join Date: Jun 2011 Location: temporarily--Monterey, CA Posts: 2,192	If you go big bore have head work done (porting) while your at it. And if you really want to go big have oversized valves installed Sent from my iPhone using Motorcycle.com App __________________ "life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "wow! what a ride!" I don't know what's gonna happen, man, but I'm gonna get my kicks before the whole shithouse goes up in flames-Jim Morrison

01-01-2013, 12:53 AM	#4 (permalink)
Jbat Senior Member Join Date: Jun 2011 Location: temporarily--Monterey, CA Posts: 2,192	I like to call it stage 9.58...because if your bike makes 110 hp and 135 tq who's gonna argue? Sent from my iPhone using Motorcycle.com App __________________ "life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "wow! what a ride!" I don't know what's gonna happen, man, but I'm gonna get my kicks before the whole shithouse goes up in flames-Jim Morrison

01-01-2013, 08:10 PM	#6 (permalink)
Jbat Senior Member Join Date: Jun 2011 Location: temporarily--Monterey, CA Posts: 2,192	You don't have to eat rid of your cylinders with either. The 108 you can do two ways, either have your cylinders stripped, bored, and replated. Or have a cast iron sleeve out in them that is the 108 bore. Because of how much cylinder has to be removed to go to the 110 the only way you can do it is to have the cast sleeve put in. But the sleeves are installed in what was originally your stock cylinder. And of course keep your cams and ECU and everything else. Unless of course you want to sell them to me on the cheap... Sent from my iPhone using Motorcycle.com App __________________ "life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "wow! what a ride!" I don't know what's gonna happen, man, but I'm gonna get my kicks before the whole shithouse goes up in flames-Jim Morrison

01-06-2013, 03:48 PM	#8 (permalink)
Luv2LafMcc Senior Member Join Date: Jul 2011 Location: Boston Posts: 1,130	This is the single area of mods that i still cant seem to get a grip on how/what to do... __________________ . . "Keep not standing fixed and rooted; Briskly venture, briskly roam." - Goethe Warrior Brothers World Wide Map ............................................... \|_ \|_\| \/ ^/_ \|_ /\ \|= \|\/\| ( (...............................................

01-01-2013, 06:46 PM	#5 (permalink)
iowawarrior Senior Member Join Date: Sep 2006 Location: sioux city,ia Posts: 1,795	i think with a 108 kit you can keep your cylinders. with a 110 you have to get new ones. and bigger pistons. you probably keep the cams and i assume the ECU.

01-06-2013, 03:18 PM	#7 (permalink)
activeyear Member Join Date: Apr 2003 Location: Ohio Posts: 59	Well it sound like the best thing to do utilizing my already installed Stage IV components is to dumb the Stage IV pistons, then send my cylinder out to have them bored out to 108ci and re-plated. Maybe spending a little more and have the heads ported and polished. Is it worth the $900.00+ ,cost vs hp gain, to have the heads done? I thank you for your input regarding my questions.

01-06-2013, 08:11 PM	#9 (permalink)
Jbat Senior Member Join Date: Jun 2011 Location: temporarily--Monterey, CA Posts: 2,192	If your gonna do the big bore, it's def worth doing the head work IMO. Even a stock bore can benefit greatly from having headwork done. Just make sure its done by someone that knows warriors (i.e Patrick Racing) as porting is easy to screw up if you don't know what your doing and you can make it worse instead of better. Bottom line-It's worth it. Luv2laf-if you have any questions ask away. These motors can really wake up with a little (or alot) of cash put into em. __________________ "life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming "wow! what a ride!" I don't know what's gonna happen, man, but I'm gonna get my kicks before the whole shithouse goes up in flames-Jim Morrison

01-06-2013, 11:45 PM	#10 (permalink)
rocketkid Senior Member Join Date: Jun 2011 Location: NE Ohio Posts: 100	Noob question for sure, but how reliable is the 108 kit? I'm coming from a sportbike background (like a lot of you) and that power craving doesn't wear off quick, lemme tell 'ya. Still kinda on the fence (about "cruisers" in general) but just can't, won't and never will see paying almost 20 large for a VROD. The air-cooled mill on the Warrior makes me wonder 'bout reliability, period. Sorry, hope I don't come off sounding like an uneducated squid or something.

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