CRF 450 Knocking

[Mikeyboii386]

Always check your oil!!

[Mikeyboii386]

bottom end

[southernprideish]

Wow. My internals are knocking so I'm gonna start the bike and rev the shit out of it. They should make you pass a general knowledge test before purchasing such awesome machines. Hate to see this shit especially on a Honda. 2 stroke for life!

[skunk1xafghani]

out of blinker fluid

[mattwg2009]

I know what the problem is! You've got cams and valves! Get a two banger and you don't gotta worry about any of that!

[redneckwoman59]

rod knock

[whatever393s]

thats a crank i know from exp.

[timothypantera]

connecting rod tear it down before you blow it up there known for crank's

[tonyjohnson98]

thats a rod, wrist pin bearing noise

[jamesm060191]

sounds like the valves are tapping the piston.

[TheMoto38]

Clutch rubber dampeners are worn,eazy fix,would replace it with a hinson.

[motocrossspeedbump96]

sounds like a bottom end to me

[kawiracer154]

why do you keep starting it if its making that noise...are you trying to fuck everything else up?

[RallyRipper]

valves are slapping piston

[JACKAU93]

The vales are hitting the piston. U need a top end rebuild and now u would need a bottom end too.

[sti4lifer]

needs a valve adjustment I think! I think if the rod bearing was bad it would be worse but IDK! I ride 2 strokes so 4 strokes suck lol

[shinfo002]

@sti4lifer would cost like 150-200bux if it was a 2 stroke to do the top end....get ready to spend about 1200$ on the whole motor with a 450, thats if u so it urself

[RacerDude78]

@sti4lifer no cuz it goes away after idle

[the32honda]

Theres absolutely nothing wrong with a CRF, only the tards who think you can rag the shit out of one and not maintain it.

[motormind69]

starting and revving it should fix it.

[billyman1221]

@motormind69 thumbs up just break it more lol

[m0nkey1eader]

Sounds like you need a tune-up. Timing = Fucked....

[28motoxxx]

ur crank and piston were probably just about seperating at that time!!

[liveyourselftodeath]

Oh my god kill switch fuck!

[agent0ran9e]

dude quit starting it your valves are bent or something, you need to quit being a redneck goon though that might solve half your problem

[pappawheeliee]

Keep revving it up it will help fix it!

[praisedtimon]

how dumb are you to keep starting an engine with a metal on metal sound?

and revving it . . .

[danimaz321]

Na dont worrie there ment to sound like that ahaahaah ;) lol

[boggers44]

sounds like a main bearing becvause you only hear it at idle

[khonky]

i know what it is....its red! sell it and get a green or blue bike!

[yamahakid450]

@khonky nahh go 4 the blue:)

[Coolride17]

Yeah keep reving it, it will repair itself eventually. LOL

[thecomebakid]

piston slap

[AJsfree2toke]

thats what my yzf450 did, ur pistons and all the internals are fucked.

[valiemma]

good dumbass that is a rod about to go out. if you dont fix it b4 it blow then you will so trash it and then like many others will be paying a grand or more to put a crank, a top end cam, valves, lifters, timing chain, o btw watch out those bikes are prone to taken the nickaseal off the cylinder and when that happens your out a grand for a cylinder and piston and rings have fun blowin it up

[diegomayan]

@valiemma you can out a few dollars trying to learn to write, virtual mechanic

[AJsfree2toke]

@valiemma This guy is completly right. This happend to my yzf450, same thing. But i waited to long and i had to change everything. Cylinder and all that.

[jmay32441]

were being forced into a 2 stroke holocaust

[ctflying]

it could be ur piston slapping or wrist pin,it also could be ur connecting rod,just giving some ideas if u havnt had it fixed yet

[49nparkskier]

for all you people who say get a two stroke ya there eazy to maintane but lets race looser

[KXRider212]

@49nparkskier My 250r would destroy any 4 stroke race bike your put down.

95kg and 53HP.

[2553shean]

@KXRider212 keep dreaming buddy i got a yamaha TT600 bored to a 670

[KXRider212]

@2553shean LMFAO!

TT600?

Thats a fuckin road bike, good for 2 things, mono's and going to the milkbar. Congrats! You now have a 670 Road bike :P

That thing weighs 180kg and has 35HP, NO WAY that will keep up to my RM up to 60mph. Past 60 and youl have the upperhand.

[jorikj]

@KXRider212 but to a you call it fucking road bike you dont watch the horsepower. or shit you need on racers to go forward.. those bikes have a high level of torque

[KXRider212]

@jorikj They weigh more than a Truck, and lack HP, yeh they do good torque, but what do you expect from a 670?

[jorikj]

@KXRider212 more than a truck.. hah when whe were 16 we where riding a honda mt. of 180 kg. with not more than 5 hp. and that thing was fast vor an MOPED. but that thing.. you can't compare that with an race bike or something.. your right its not the fastest bike. but iof you never ride a bike en you step on that one. than its fast.

[TheCoby420]

i have the same bike 2002 crf 450r i have a vid on my channel my bike is doing that same thing,my choke is on in my vid so you cant really hear the noise, it it only dose it at low rpms, it seems to be fine with the choke on because it revs higher the bike still drives fine and works fuckin a1 but just has the knock on bottom end did you ever figure out your problem? the noise coming out of my bike is not quite as bad as yours yet anyway, i was wondering if yours started small and got worse?

[SolanaDuner]

My CRF450 was doing that but while I had the rpms still going. I took it to Racers ER and they replaced the CAM CHAIN TENSIONER and it fixed it! Its your cam chain that is loose and its smacking against the side wall inside of the motor. Look into CAM CHAIN TENSIONER it tightens the chain, its on the side of the motor. Hope this helps:)

[aW9Rn]

"sounds like a german tank" <3

[idioten112jan]

@aW9Rn hahahah yeeeeh

[dillonmitchum124]

what was it?

[Cr250FULTROTTLE]

get a 2 stroke xD

[crimson22s]

@Cr250FULTROTTLE hahah i know right my 125 is awesome

[jerrysjunk]

its a wrist pin going bad

[johntedrowjr]

crf from the year 05-08 i believe had trouble with valves/pistons/cranks- so on their good if you rebuild them right

[lookanalien]

@johntedrowjr those were the 250s not the 450s.

[johntedrowjr]

@lookanalien i know but i was guessing it related

[lookanalien]

@lookanalien its cool

[Loc299199]

valves lil fucked up

[skillsaw94]

four strokes are for little girls

[TWOJTKOWSKI03]

sounded like my crf 250r it had a blown apart bottem wrist pin bearing

[WhitePridefighter666]

thats a nice cr500

[hondakid3a]

Sounds like ur compresion release

[TheBigJonJon]

valve are hitting the piston

[sk8erdude87]

@TheBigJonJon no they are not

[BeNtOuTTaShaPE1]

2 stroke nation

[kawibbyrule]

valves need to be AJUSTED duh but sept it 3 years old i hope you figured it out

[421411]

hell i say fuck the crf and go ride the 3 wheeler in the dunes

[cjruggero69]

Oh yeah. keep it fuckin idleing. FUCKIN IDIOTS!

[dhawes96]

shut the fucking thing off...the piston is knocking your so fucking stupid when it makes a noies like that you dont rev it up you retard

[craiglawrence90]

Main Bearing Gone To Me By YZ85 2007 The Same (SELLING NOW)

[lookanalien]

It might be that you got the piston in backwards and its slapping around in the cylinder.

[killeigh11]

bottom end or valves could be stuck

[killeigh11]

it is your bottom end bearings man your crank it rattling around the bearings are gone u need 2 get bearings quick if not dont start your bike or u will need a new bottom end because the bottom end will sieze ohhhh bad luck it happend 2 me!!!!!!

[jonathanb014]

get 2stroke

[jonathanb014]

blown engine gasket perhaps???

[BlowMe719]

First, you dumbass, put 93 premium in it. It wont run with 87, second adjust your valves.

[HONDAforLIFE3312]

does it have a lot of compression?

[RapidSkillzMontages]

if its that bad and you cant figure it out... just take it to honda. why trust people on youtube?

[kxlover26]

"sounds like a german tank" hahahaaaaaaaaa funny shit

[brandonpovia]

did it have a bad motor mount??? cuss it sounded like it was rocking when it idled down thats when it tourqes left. notice it didnt do it whe u reved it.

[guitargod66]

low muffler fluid.

[epert1010]

So did you get it sorted out?

[lownes2345]

sounds like a bent valve or bad timing

[Ianmakingvideos]

could it be the valve clearance.

[gordotj]

cam valve adjustment!!

[proalert]

Low rpm piston slap (worn) Happens when the skirt of the piston 'slaps the cylinder wall.

[JxRxS94]

Everyones saying buy a 2stroke, yeah do that and look foreward to rebuilding them every other week.

[KTMsx125rider753]

@JxRxS94 i can rebuild a 2 stroke in an hour and have it broke in it would take me forever to figure that stupid thing out

[240sx4Life]

try changing the tranny oil. my cr250 did this.

[LEANDROANDINA]

oh i thought this video was about you trying to knock on your friends window with the dirt bike (my friend tried it he just ended up crashing in)

[Fox250R]

@LEANDROANDINA WTF ARE YOU TALKING ABOUT>>>>>>

[LEANDROANDINA]

@Fox250R Im talking about that i thought your video was about doing a wheelie and knocking on your friends door then i said one of my friends tried doing it and crashed through the back glass door

[Fox250R]

@LEANDROANDINA dude say this with me "METH IS BAD"

[LEANDROANDINA]

@Fox250R sure but what time do you want to say this at like 10:00 pm because i live in orlando i don't now what time it is where your at i guess california

[Sebastianslife]

@Fox250R LOL

[matttyv]

@Fox250R your valves and piston is fucked lol. ...i dont have a 4 stroke but i jus know ...2 stroke the way to goo lmao

[spaztack]

@matttyv You are a funny guy. You are obviously educated in piston technology huh? When it has perfect compression and it runs, it has to be the piston huh? Go read some books dude.

[matttyv]

@spaztack fuck 4 strokes there shiiiiiiiiit

[herse88]

@matttyv lmfao!

[JuniorPros118]

Simple Fix. Buy a 2 Stroke and you will never have this problem, it's the vavles dude. Adjust them...

2strokes for life!!!!!!

[1987Honda250cr]

the problem is you need to stick with the 2 stroke honda and not the wet fart sounding 4 stokes even though they are pretty beast

[HondaaRacer75]

Hey was the crank bearing bad? Or were the valves fucked?

[nickiz1]

crank

[TjejLord]

valves?

[disarmyou84]

that bike sounds fine,lol

[mxracer923]

wat was wrong with it

[Fox250R]

@mxracer923 Its a CRF lol

[johndevinaspre676]

@Fox250R haha nice but crf's are usually pritty reliable

[2006hondacr250r]

@Fox250R that why i love my two strokes ha ha

[SchuyTV]

@Fox250R sounds like you got water in your sparkplug boots lol

[ChopHerSS]

@Fox250R your dumb.

[zombi105]

@Fox250R yep the damn most reliable bikes there are

[liveyourselftodeath]

@zombi105 Did you ever find out what the cause of the knock was?

[2hot4you369]

@mxracer923 valves need to be adjusted simple fix, but if you dont adjust the valves, then ur fucked, the valves with ummm meet ur piston, what their not suppose to do and ur wallet ummmm has a huge ass hole in it

[boomstickkid]

nice trike

[MrCrf450rider]

your valves probably mushroomed up in the head,and are locking up

[adamuchan]

Bro the piston is around the wrong way, thats your valves hitting the piston.

[brettrideshonda4life]

why the fuck would you keep starting it?

[crazymxboy]

lets keep doing what doesnt sound good maybe it will just lock up if we get lucky

[kelleyi]

@crazymxboy haha my fuckn thoughts exactly

[sinisterseven8]

revving it up is def not goin to help lol

[MichaelD400]

Lol Happends when you Buy them Handicaps :)

[XxSacridxX]

Cool back tire...do u even ride lmao? who keeps their back tire like that...check your oil its prolly your piston knocking or your rods lose lol

[SRV32566]

what was it, a valve?

[hondagurumatt]

by viewing this video and seeing your back tire i have come to a conclusion. its FUCKED

[Tkelly94]

what was wrong with it?

[fitbiking9]

you are a fucking gay mother fucker a you dumb red neck!!!

[abski99]

youve run out of oil. and the pistons grabbed =)

[FuLLyFuckeR]

ventiele eingeschlagen ! titanium---stahl ist besser ;-)

[SpartiBURNOUT181]

i think that is the decompresion kit it doesnt work ...

[TWOJTKOWSKI03]

sounded like my bike my connecting rod bearing blew

[SgtVVaffles]

Fukin piece of shit.

[swifferkillsdogs]

the tick noise is the gap being 2 far between the rocker arm and the top of the valve

[EZkill5]

@swifferkillsdogs dosnt that means you need to adust the valves

[swifferkillsdogs]

its prly ur valves is the bike reallly hard 2 kick,yes i no its hard 2 kick in the 1st place but has it increased sice u got it,or ur crankshaft,

[racine924]

dude change the rod,rod bearing,top end, and prolly adjust the valves. you need to do this before you blow a rod out the front of the cranke case it happen to my frineds crf250r

[dragoncustomcycles]

bye bye crank!!!!

[greasyredneck]

hey was it the connecting rod bearing to the piston or crank shaft, i have the same problem but not that bad, and i still got to fix mine

[kono993]

did you get it fixed?

[drz400e332]

that trike is the real gem...

but that bald rear tire may have had something to do with that noise lol

[dankevw]

hey nice bike bro

[moto93420]

what a dum ass you dont deserve a bike and that bike wont ever get fix

[Fox250R]

It is fixed you fucktard..

[blowinitup248]

u dont deserve a bike, u def dont deserve a honda,...just when i thought that you were trying to figure out what was wrong with it, you reved it up. wtf were u thinking..god i hope u dont ride like u treat ur bike

[dirtbikekid12]

leaky header or piston slap

[KerickOBrien]

ever figuire it out?

[norflett]

the real star is the 250R

[Fox250R]

damn right! :)

[dirtbike4life1]

@norflett you know it, 2 stroke 4 life

[xcrrider44]

valves need to be adjusted thats why it wonnt idle

[TheHondaAbuser]

valves....

[146YamahaRacing146]

then why th hell do you keep startin it back up and giving it hard revs you retard. You dont know what the problem is and you may be making it worse!

[Fox250R]

cause we dont give a flying fuck...

[146YamahaRacing146]

Well why do you have the bike you fuck up

[PITBIKER98]

u dont give a flying fuck? LOL

[Fox250R]

@146YamahaRacing146 coming from someone whos 27 and rides a 125?

[freeridinguy]

you sound stupid saying that, a 125 2 stroke is equal to a 250f and really it dosnt matter how old he is anyways, its how good he is

[Fox250R]

what did i say? lol

[kxsteven4]

@freeridinguy it is

[MoToXmaN59]

Its defenatly the muffler bearing!!

[mudpupp7]

sounds like possibly your adjusting your idle to low. an when you rev up it goes away. but i am not a bike buildin genious, but i sure can break em!~

[mill4978]

That is a bad crank bearing or piston slap. Most likely the crank bearing. You don't want to be reving it like that when you have that problem your making it worse in fact dont need to be reving it like that when cold. But I'm sure you've got the problem fixed

[Mxkid14]

top end or valves or check the packing in the muffler

[Fox250R]

@Mxkid14 lol

[77toyota]

yea its your muffler hahahahahahaha

[yamaharider12294]

sounds like a geran tank hahahaha. that was pretty funny did you ever get it fixed

[mx121chris]

thats what u get for not knowing how to fix a motor

[Fox250R]

@mx121chris ya but i got money to buy another one :)

[SuzukiRacing92]

main bearings

[jakthesmack]

i had to use some regular 87 octane gas to get home on my bike a while ago, it started knocking like that. without 91, they dont run too smooth haha

[Crumpetman420]

start it up a bunch of times and rev it that'll help

[Fox250R]

no shit thats why we keep doing it

[herse88]

@Fox250R Wot was the verdict! was it piston slap,valves?

[Fox250R]

@herse88 no idea to be honest, I hit a tree like 10 months ago and it hasnt made the sound since... so fuck it

[BubbaZanetti6666]

exhaust rattleing off frame, maybe hitting the tree bent it back haha

[bagheadbaby]

ur gna kill it...

[dirtbikekev17]

try setting ur idle speed up cuz it seems to only knock when ur off the gas

[exoged]

was that stalling automacticly

[outlawracer2229]

Start by checking the simple things first. Exhaust leak. A rod slap would get louder as you rev it.