LTZ400 Big Bore Kit Installation (LTZ,DVX,KFX)

This is me showing how to install a big bore kit on my 2004 Arctic Cat DVX400!
Current Rides -
2005 Nissan Titan
2013 Toyota Yaris
1996 Suzuki DR350
2003 Honda 400EX
2005 Arctic Cat 500 4x4
2004 Arctic Cat DVX400

[@dbaKen]

STILL GOING STRONG IN 2024!

[@chasehicks9757]

Awesome work, hows it holding up?

[@dbaKen]

Holding up great!

[@bcobrag]

What gasket did you end up using? I noticed the kit that it came with has 3 metal. Did you have to use all 3? I’m currently doing the same build

[@dbaKen]

If its riveted, its one piece , not 3 separate gaskets. I don't remember what gasket i used but OEM is best.

[@keithparady2594]

Was it worth it and have u had any problems did u have to do anything to cams or any thing else for it to run right

[@dbaKen]

Been running great after I tuned the carb , no leaks , no ticks and and no smoke. I think it was worth it!

[@keithparady2594]

Kenneth Pickett was the power gain noticeable I’m only asking cause I don’t wanna blow her up even though it’s a bulletproof engine

[@dbaKen]

@@keithparady2594 I actually didnt get to ride it before I rebuilt the engine but I can tell you when I get it perfectly dialed in and geared it's going to be smooth and fast.

[@kikemotors6138]

Great vid man what did you torque the head bolts too?

[@dbaKen]

People on the forums suggest using 43 ft lbs. The manual say 34 I believe but people didn't have problems using 43 ft lbs.

[@kikemotors6138]

@@dbaKen awesome man thanks!

[@dbaKen]

No problem!

[@coreysworld433]

This is a good channel. I hope it grows

[@dbaKen]

I appreciate that!

[@derekgarner3797]

Do I need to have the things to hold the chain from moving?

[@edgarflores5338]

Hey man I was wondering I’m thinking about doing the same thing with my ltz400 what else did you have to do after the rebuild after for it run right and did it sound louder or notice the power increase?

[@dbaKen]

Youll have to tune the carburetor , that's one of the most important things to notice all the power from the big bore kit.

[@dbaKen]

You shouldn't have to do anything if it is fuel injected.

[@michaelwahl5872]

Did u have to jet the carb when u put this big bore on I put one on my kfx400 and it won't rev but idles great and starts right up

[@dbaKen]

Yeah you'll definitely want to re jet. Especially if you have any other mods. I have my intake box lid removed so I definitely had to.

[@michaelwahl5872]

@@dbaKen thats what I thought I riped the head off to double check the valves just incase it was that but it was good so I guess imma try to rejet it thanks for the help

[@saschap481]

Looks good bro

[@dbaKen]

Thank you!

[@sonicpower687]

my original cylinder was smoked so i just threw in a 450 bb and i threw in shims that where .05mm bigger thing rips but its not as responsive and i would like any ideals on what may cause some throttle lag? almost like im in to high of a gear when i up shift from full throttle.

[@dbaKen]

tune your carb!

[@saschap481]

Nice

[@DavidJones-pc4ft]

Do any of these big-bore kits include a new head?

[@dbaKen]

Probably not. But they do make them. I bought an aftermarket one

[@cadman9615]

What pilot & main jets did you use?

[@dbaKen]

I ended up putting a 400EX Carb on it , but i plan on going back to a OEM LTZ400 carb.

[@joseasantiago9759]

Nice just put 2 fan on it & cuz big bored used to get to hot quick pistons rims gone in less 20 hr

[@claymyersrs3072]

How long was the total process

[@dbaKen]

Few hours to install the big bore kit at most , not including taking the engine out and installing the engine.

[@haydenbrasson4324]

Where did you buy your kit?

[@dbaKen]

I believe it was a Niche Kit If I remember correctly. Worked on so many things I can’t reminder the specifics sometimes lol

[@nickjohnson7841]

Do you not have to gap the rings?

[@dbaKen]

Yes always check ring gaps , in this case this ring gaps on the kit I bought were perfectly in spec.

[@nickjohnson7841]

Ok, new to quads rebuilt many motors but wasn't sure if rings came pre-gapped on jug kits. Let us know if it was worth it.

[@dbaKen]

@@nickjohnson7841 I've been very happy with the kit and I haven't been easy on it at all and it starts up every time.

[@dbaKen]

@@nickjohnson7841 Also , depends on the kit if they're pre gapped. Some kits will include a sheet of paper saying they're pre gapped or not but if there is no sign that they are or not it's always a good idea to double check that theyre gapped right. I've had a kit that was way off and I had to change to gaps big time.

[@jessecrawford2711]

What kit did you use

[@dbaKen]

The link for the one I bought doesn’t work anymore. But a really good kit would be Athena but a budget kit would be niche.

[@jessecrawford2711]

@@dbaKen yeah I guess I'm gonna wait till my tax refund and spend the big bucks but I've been thinking about those cheaper ones wondering if anyone has had any luck. I commute on my drz so I probably shouldn't cheap out

[@dbaKen]

The cheaper cylinders are usually good but I’d recommend a good piston and rings tho.

[@jessecrawford2711]

@@dbaKen ok that's what I figured you would say. Lol I was hoping you would say don't worry namura last for ever thanks brother I'll subscribe for the reply

[@dbaKen]

@@jessecrawford2711 I’ve ran Namuras pistons without problems too.

[@kolemccullum1905]

you got the link to the manual b any chance?

[@dbaKen]

www.crservice.dk/Suzuki%20ATV/LTZ400/LT-Z400_01E.pdf

[@dbaKen]

Let me know if that doesn’t work!

[@diegodollaz686]

This kit still doing good?

[@dbaKen]

Yeah its reliable so far

[@teamwoodswarriorsracing2004]

What brand bbk/cams etc did you use with your build?

[@dbaKen]

To be honest I was really broke when I bought it so I think it was not even branded but so far its held up to massive amount of abuse. And I'm currently running stock cams but would like to run hot cams eventually.

[@giroprietoperformanceshop9451]

Why there are 2 similar cilinder gaskets?

[@dbaKen]

Base gasket goes under the cylinder (probably a paper gasket), the head gasket goes on top of the cylinder in between cylinder and head (usually a metal gasket).

[@dkzpk]

Did you re-jet it? And how much if you did

[@dbaKen]

Bought a signa jet kit , but my needle needle ALOT of spacers. www.ebay.com/itm/Arctic-Cat-DVX400-DVX-400-400cc-6-Sigma-Custom-Carburetor-Carb-Stage-1-3-Jet-Kit/332160081271?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

[@DeathFear-zr6fi]

hi man can i use the original camshaft with the big bore kit ?

[@dbaKen]

Yes!

[@DeathFear-zr6fi]

@@dbaKen do you have the Nm for the crankshaft and camshaft ?

[@danpmatz]

where is the kit from?

[@dbaKen]

This is the one i bought at the time since i was balling on a budget - www.ebay.com/itm/Arctic-Cat-DVX-400-434cc-Big-Bore-Cylinder-Piston-Gasket-Top-End-Kit-3402-844/283746206988

[@jauntewade1946]

Did it smoke after?

[@dbaKen]

A little after startup because it burned the oil in the cylinders from installation.

[@jauntewade1946]

Kenneth Pickett mines smoke haven’t rode it yet cause it’s weird

[@dbaKen]

Might need to run it a little bit , ive had oil get stuck in the exhaust of a bike before and it made it smoke for a few days before it all burned off

[@jauntewade1946]

@@dbaKen yo I haven’t rode my bike since, but went back out today and it started up and started smoking. But the dude that added my big bore didn’t add the new head gasket. Think that’s why it smokes?

[@dbaKen]

Did he reuse the old one or does it not have one at all?

[@daltonhood7130]

Where is the full video of timing and such

[@dbaKen]

I don't think I showed any of the timing , i think i stopped after i got the big bore kit installed. I do believe there are great videos on youtube showing how to time them.

[@raulmoto4116]

Waaaa

[@kslvlkdfhkvhkfviwehbhjhj]

You need a camera mount, you're making me car sick.

[@dbaKen]

The whole point is to give my POV , but I have better camera settings now and it should be way better.

[@graygunter848]

What kit is this?

[@dbaKen]

www.ebay.com/itm/283746206988. I've never had a problem out of these kits and I've beaten the piss out of some of these kits and not even a leak or tick!

[@graygunter848]

@@dbaKen thanks imma order me 1 next week for ny 03 z 400. Just asking reliability of um

[@graygunter848]

@@dbaKen i seen a kit uses same namura piston without extra plug n filter for 150$ i have in mine now a sleeved wisco kit n it lasted 3 yrs blown head gasket now.b

[@jamesburson8439]

What big bore kit did you use

[@dbaKen]

This kit but it looks like they're out of stock. Paid under $200 - www.ebay.com/itm/283746206988