39mm FCR's on the 840 - TeryxHQ.com Forums

chase · 06-09-2008, 12:17 AM

here are the 39mm fcr carbs on my 840. money well spent these carbs work flawlessly. big improvement over the entire power band. radared the teryx at 72mph at 8600rpm's on saturday and it was still accelerating when i let off the gas.

dieselpowered · 06-09-2008, 12:55 AM

Looking good! I do have a few questions, so please forgive the ignorance.

First off, are the carbs on there attached to each other or are they both on there seperately. With that said, how does the throttle function, are they still synced with the single cable or what? In addition, do you need to modify the choke or carb heaters or anything like that?

What are the advantages to these carbs versus the stock?

puddle jumper · 06-09-2008, 09:08 AM

these carbs are bigger and better than stockers,making more power across the powerband

chase · 06-09-2008, 09:39 AM

Quote:

Originally Posted by dieselpowered

Looking good! I do have a few questions, so please forgive the ignorance.

First off, are the carbs on there attached to each other or are they both on there seperately. With that said, how does the throttle function, are they still synced with the single cable or what? In addition, do you need to modify the choke or carb heaters or anything like that?

What are the advantages to these carbs versus the stock?

no, they are not attached in the pic you can see how they are turned slightly to clear each other. a separate cable gos to each one and then combines into one under the drive shaft housing. there is no choke or carb heater. to start just pump the throttle the accelerator pumps do the trick. these carbs are superior to the stock carbs in every way. first of all the are larger, to take advantage of that we ported the intakes to 38.5mm that is all we could safely go. secondly the stock carbs use vacume operated slides the fcr's are manually operated and have accelerator pumps, that means instant throttle response. trust me these things work great, it won't be long before someone has a kit available!

Turtle · 06-09-2008, 10:15 AM

When I put the Dynatech(sp?)

CDI on my stock engine & maybe Muzzy's would these be something to add, or would they be a big waste on the stock engine? Also, roughly how many hundred $$'s would be involved?

chase · 06-09-2008, 01:09 PM

Quote:

Originally Posted by Turtle

When I put the Dynatech(sp?)

CDI on my stock engine & maybe Muzzy's would these be something to add, or would they be a big waste on the stock engine? Also, roughly how many hundred $$'s would be involved?

i can't imagine you wouldn't see some nice gains on a stock motor but you may be better off investing in one of Four Stroke Techs bb kits first. this carb setup will run you close to $1000 if you do the fab work your self. you can get one of mickeys standard bore kits w/cams for that! don't get me wrong though these are great carbs!

Four Stroke Tech · 06-11-2008, 08:07 PM

Quote:

Originally Posted by chase

here are the 39mm fcr carbs on my 840. money well spent these carbs work flawlessly. big improvement over the entire power band. radared the teryx at 72mph at 8600rpm's on saturday and it was still accelerating when i let off the gas.

Your boy from White Knuckle Racing called today, looks like someone is coming for you!

chase · 06-11-2008, 10:31 PM

Quote:

Originally Posted by Four Stroke Tech

Your boy from White Knuckle Racing called today, looks like someone is coming for you!

i'm going to need those big valves fast! let me know when you have them

.

the_hulkamaniac · 06-29-2008, 05:39 PM

What model fcr are these they have a down turn for the float bowl. The fcr's I have used (single cylinder racebikes) are all verticle without a bend. My bro just picked up a teryx I was thinking of one but was going to wait for efi, I never thought of fcr's. Now I might change my mind.

It sucks that these motors can oly open up to 38.5mm did you fully port the motor or just port match.

Finaly the 840 is it bigbore or stroked combo.

chase · 07-08-2008, 12:00 AM

Quote:

Originally Posted by the_hulkamaniac

What model fcr are these they have a down turn for the float bowl. The fcr's I have used (single cylinder racebikes) are all verticle without a bend. My bro just picked up a teryx I was thinking of one but was going to wait for efi, I never thought of fcr's. Now I might change my mind.

It sucks that these motors can oly open up to 38.5mm did you fully port the motor or just port match.

Finaly the 840 is it bigbore or stroked combo.

they are 39mm fcr downdrafts, its an sv650 kit the bowls are tilted. just port mached the intake snout. the 840 is a bb no stroke!

06-09-2008, 12:55 AM	#2 (permalink)
dieselpowered www.TeryxHQ.com Join Date: Feb 2008 Location: Peoria, AZ Posts: 2,046	Looking good! I do have a few questions, so please forgive the ignorance. First off, are the carbs on there attached to each other or are they both on there seperately. With that said, how does the throttle function, are they still synced with the single cable or what? In addition, do you need to modify the choke or carb heaters or anything like that? What are the advantages to these carbs versus the stock? __________________ www.RhinoTalk.net www.TeryxHQ.com 2008 Kawasaki Teryx \| 840cc BBK w/ stage III cams \| FST long travel and HD steering \| Twisted Stitch seats \| MSHQ cage \| Muzzys dual exhaust \| Dynatek CDI \| aFe intake \| HiPer carbon fiber beadlocks \| Goodyear MT/Rs \| Crow restraints \| Livewire LED whip \| NightOwl HID conversion \| 40" Edge Series LED lightbar \| Fuego Dual HID Lights \| Dalton clutch kit \| Full audio \| Navigation \| Lightened and machined clutch \| Power Steering \| TrailTech Vapor Computer \| More to come...

06-09-2008, 09:08 AM	#3 (permalink)
puddle jumper Senior Member Join Date: Apr 2008 Posts: 170	these carbs are bigger and better than stockers,making more power across the powerband __________________ red le 28" bugs nukes audiopipe belt snorkels dyna HW carb kit overdrive plate xpatv lift super atv bumper Night Owl Hids k&N billet intake grant wheel

06-09-2008, 10:15 AM	#5 (permalink)
Turtle Senior Member Join Date: May 2008 Posts: 117	Big carbs on a stocker? When I put the Dynatech(sp?) CDI on my stock engine & maybe Muzzy's would these be something to add, or would they be a big waste on the stock engine? Also, roughly how many hundred $$'s would be involved?

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06-29-2008, 05:39 PM	#9 (permalink)
the_hulkamaniac Junior Member Join Date: Jun 2008 Posts: 3	What model fcr are these they have a down turn for the float bowl. The fcr's I have used (single cylinder racebikes) are all verticle without a bend. My bro just picked up a teryx I was thinking of one but was going to wait for efi, I never thought of fcr's. Now I might change my mind. It sucks that these motors can oly open up to 38.5mm did you fully port the motor or just port match. Finaly the 840 is it bigbore or stroked combo.