what should i do for more power for my 05 kfx

[kawii22335]

my kfx has a full pipe and no airbox lid but still not enough power u guyz have anything to say tht will give me more power on bottom end...thanks

[soberagain150]

bottom end? you get a 13t front sprocket. you loose a little on the top end but not that much. i actually have one still laying around too if ya wanna buy it. i prolly used it for 3 rides. pm me if ya want it.

[johnafun]

is it rejeted or maped? are you running an after market filter such as the mod quad air system? how about a rev box(extends the rev limiter) those are some ideas. i have a ltz400 (basicly same bike just diferent name and color "go figure")and i am having the same issue. rather then changin teeth on the sprocket i will be trying lower profile tires wich will give a less extreme change . im about due for new tires any way.LOL.

all these are in the process of being done on mine and around jan14th ile know the results


VIVA LA CROSS CREEK C.P.

[kawii22335]

well ok budd just send me the resultswhen ur done...thanks

[4R3AL]

THE 13T SPROCKET IS A MUST FOR ANY TRAIL/MX/XC RIDER! it does take 10-15mph off your topend but well worth it in the bottom. WELL WORTH IT! definitly rejet it, a new intake, and the revbox is a MUST to get rid off. i hit my stock revbox constantly before i got my dyna programmable

[johnafun]

GEE i try and give someone else advice and end up finding some advice for myself.i think i will try the 13t sprocket myself.the gears do seem a lil tall. same thing we do with our street stock drag bikes. go one tooth down on the front sprocket. a front sprocket is cheaper then a rear sprocket. thanx

now who wants to sell theyre 13 tooth now?

[johnafun]

oh heres another thought in case your on a budget and dont want to get so extreme that you end up building a whole new bike. try buying a used pair of ltr450 handle bars and puting them on there.peaple are practicly giving oem ltr450 parts away after they start modifying them. the ltr's handle bars are lower and wider wich made a big difference for me on steering. and theyre are lowering kits out theyre that dont involve replacing your whole front and rear ends. i think mine are CRJ.

[01z400]

a 13tooth is a good idea and no it does not take off 10-15mph around 5 maybe 8 at the most. If I were you I would look into a FCR carb. They really bring these alive if tuned properly. I have a Dynatek FS and this really made mine run better. I felt more low end from the slight timing curve. Also are you looking to get into the motor?

[soberagain150]

i have a 13 tooth front sprocket... pm me

[TheNewn]

How much money do you have to spend? You could do something simple like the sprocket change, or you could step it up and get a cam or cams, or you could even go for a Z434 kit thats cheap (for what it is) and reliable from Athena.

[johnafun]

i got the 13 tooth front sprocket today from motosport.com $8.00 cant beat that upgrade. for 8 bucks ile probly strip the teeth within a week. but hey 8 bucks what do you have to lose.

so lets see i got CNJ lowering kit,slip on pipe,jetkit,modquad air flow system,ltr handle bars,13T sprocket and a rev box. thats about $530.00 if you shop in the rite places.

now i just wait for it to come out the shop cuz im to lazy and anxious to do it myself nowadays. LOL

[RATPACK Z400]

13 tooth front for trails is a start,spend a little and get 430 stroker kit will put you at 450 speed or if your a big spender get 470 stroker kit put out around 55 hps ,but try 13 tooth front sproket first.

[4R3AL]

Originally posted by 01z400
a 13tooth is a good idea and no it does not take off 10-15mph around 5 maybe 8 at the most.

From my expierence it does. but lets not get into a big arguement off nothing. i clocked my stock gearing at 74mph. with the 13t i clocked it in at 63

[01z400]

Oh im not trying to argue I just didn't think is was that much! I ran 71-73mph wit a 13 tooth and 22in tires but have not checked since i went with 20in tires

[RATPACK Z400]

my top speed suffered as well when going to 13 tooth front for trails and hillclimbs was big difference it got up more hills and was less shifting in the trails but that was tight trails I wouldn,t do it if trails are wide open I now run 15 on front with 20 holeshots in rear cause I rode alot of tracks in Arizona before coming home to Maryland and love it that way will never put heavy mud tires on rear again took away acceliration,and i dont ride muddy trail as much.

[johnafun]

i noticed when buying the 13tooth it wasnt as abundent as the option for a 15t.with my mods and type of riding it seems more logical cuz i rarely will be in 5th toped out. so tell me what brings someone to the 15. raising teeth on both ends? mods so powerfull it can make up for it? tire profile changes? riding style?
not trying to bag on anyone for it. i just cant come to a conclusion other then drag racing,poker runs or pro racing to justify that kinda gear change.

[01z400]

I was also wondering about the 15 tooth. Even running 18in tires I would hate to go up to that

[RATPACK Z400]

I got procircuit pipe,airfilter with lid off,jetted ,axle ,spacers front ,gusset kit ,those are my only mods so far but I got bandits front tires that are flat ,holeshots in rear 20in 15 tooth front 38 rear it with the holeshot seems ok for now I use to run mud shark 22in rears for trails with 13 then i went and rode the dunes in so. CA ,and the sinders in AZ with paddles with 14 then went to 15 with paddles then took off paddle for holeshots to ride track and never cahnged the 15 front it didnt spin out on take off as much or in turns i probably change to 14 if I get 20in holeshot hds though but try different gearing you may like it it only $20 for sproket.As for running 18in tires or 20in with 13 is tork overkill in my opion run those 18 with 15 /38 gearing will be a world of difference sounds like you ride track ? you wont believe the hook up and speed you,ll gain

[01z400]

No I run 20in Kenda Klaw XCR. I do mostly woods, trails and climbs hills so the more torque the better

[johnafun]

ya i do more track time then anything.im no racer but thats what i love to do.im actually looking into actually racing in a lower class.what your saying there makes alot of sence on the 15 tooth now.i ride in texas more hard compact dirt and clay.problem with the ltz is it grabs to much traction and i loose time braking into a hard corner and cant get the tires to loosen up for a slight drift.now coming out of the corner is great and barely makes up loss time going in the corner. now my ltr has the oposit prob i can fly into the corner fast as hell kick it side ways and drift on threw but coming out i have to put it up into 3rd or 4th to grab traction. so both bikes run equally on the tracks due to theyre advantages and disadvantages

[RATPACK Z400]

I use to run 13 on front with the mudsharks cause they weighted 20pds a piece,I ran 20in holeshots with 13 and the quad was like riding on ice it spun so much! now say 2nd gear gos to 25 with 13 now with 15 it will go 30ish [not real #s] but the gears are longer now, than shorter with 13.I have,not clocked top speed with new gearing but I am interested to see, but on straights and open trails it flys now. the 13 was only good for steep hills you kind of need to choose if you,re going to hillclimb or go fast or go in the middle with stock 14 I have two links on chain to go from 13 to 15 front when I want, wont do that when I get new chain did it to old chain never had problem.

[01z400]

Got some old style hotcams coming I am excited!!

[johnafun]

YA I THINK THE 13T WILL DO FOR MY SHORT TIGHT TRACK STYLE

shoot and im ecsited to i work on a darn tow boat for 20 days at a time and i come home next monday.i cant wait to get home and try these new mods on the track.shop said all parts are in and should be done wensday. wooo hooo.

[4R3AL]

Originally posted by 01z400
Got some old style hotcams coming I am excited!!

Has anybody done any research on Cams and Valve Springs? let me know im looking to buy some, just havent had the time to research yet.

[4R3AL]

Originally posted by 01z400
Got some old style hotcams coming I am excited!!

Has anybody done any research on Cams and Valve Springs? let me know im looking to buy some, just havent had the time to research yet.

[01z400]

What you want to know? depends on how mild to being really built. IM me As far as springs I would buy the DRZ kit, come with springs, gaskets, bump your compression up some. Also on valves Ferrea is what I would get!

[johnafun]

i cept forgetting to post my results after my new mods. well first off the guy doing the work screwed me over.bike ran flat no powerband turned out he lost the needle on the jet kit. so we spent 5 hrs messing around with the carb and found an oldschool drag racer who came up with a good trick.( put shims on the stock needle with the fatest main jet in the kit)??? i was like what? well we put a 170 jet and put 4 shims on the stock needle and air turned out 2 rounds and the air box lid off. and wella to my surprise the best bottum end power ive ever felt.no need for the rev box now LOL but we kept it anyway. as far as the 13 tooth im not sure wether i like it or not. i do,,, but i think with this jetting set up it can handle the higher gear. the good news on the 13tooth is on those tight tracks if i feel the biketrying to tip in a turn i can hamer the throttle and break the rear end loose and let off to grab. i can outrun my ltr 450 on the track but i have to give it everything i have and the issue becomes my front suspension being to stiff and my endurance. so next project is my front suspension. the crj lowering kit puts the front shocks at such a outward angle they went stiff and no matter how extreme the adjusting weve done nothing seems to soften it up.

[cataway]

what do you have for an intake ? i was more than pleased with what i did 2+ hp from it .
as for suspension a year ago i put on shocks from a 450r ,i did not think to much about it till i road a friends Z which still had the OEM ones ,wow the 450r shocks are very good thing to have.

[johnafun]

as far as intake? are you asking ingine intakes or air box? nothing is done to the engine at all. im a ferm beleiver in keeping it simple and still out run the guys with all the heavy expensive work. all that is done to the ltz is CRJ lowering kit,ltr450 oem handle bars(wich make a great cheap addition wider and lower $20 on ebay) HMF slip on ,jet kit, mod quad air flow sytem with the air box lid off,rev box and 13 tooth front sprocket. all costing around 4 or 500 dollars.

and i love ltr's suspension but i like riding my ltz better cuz the ltr just has to much HP for its size,goes through tires like melting butter and allways feels like im riding on a huver craft smooth ride but slides to much... thats a good idea i might try buying some oem front ltr shock's thanx

[cataway]

mod quad air flow sytem . thats a new one to me ,any pic's?

[johnafun]

LMAO ya a (mod quad air flow system) is a fancy name for a kit wich is simply an alluminum mount that is bolted to the inside of the airbox so that a K&N or similer reusable air filter can mount too.the box is kept to guard from large splashes of mud and water getting to the filter.though when not in use i must put the lid on cuz it also likes to collect water at the same time with the power washer.LOL. but ya i would go without the box but the places i ride are prone to get water and mud puddles. not often the tracks i go to are COMPLETLY dry(central texas).

today i found a cure for my front suspension problem. a WORKS zero preload front end kit .will do away the the front CRJ's,using the stock origenal angle's, keeps my 3 inch drop on the front with good suspension that they claim can handle the small jumps involved in TT's.
<a href="http://s115.photobucket.com/albums/n319/johnafun/?action=view&current=169.jpg" target="_blank"><img src="http://i115.photobucket.com/albums/n319/johnafun/169.jpg" border="0" alt="Photobucket"></a><a href="http://s115.photobucket.com/albums/n319/johnafun/?action=view&current=PICT0017-1.jpg" target="_blank"><img src="http://i115.photobucket.com/albums/n319/johnafun/PICT0017-1.jpg" border="0" alt="Photobucket"></a>..
notice the extreme angles of the front shocks.. i have no ther pics other then completly stock yet.we are waiting on goforitgraphics custom graphics rite now.so she is as plain jane as can be nothing special.besides no one gonna see nothin but the rear end LMAO J/K.