Bike makes a ticking/knocking sound after warmed up for about 5 min? VIDEO - Yamaha YFZ450 Forum : YFZ450, YFZ450R, YFZ450X Forums

smokedlights · 02-21-2011, 04:56 PM

Not sure if this is normal or not (havent had the bike long, starts up and sounds good until warm, then sounds like its knocking or ticking or something (metal-y noise), I've uploaded a video hopefully you can get a good sense of the noise through it, only really heard at idle, bike has full power and no smoke etc..
click picture to watch video..

motor490 · 02-22-2011, 02:48 PM

Have you checked your valves?

**husker525** · 02-22-2011, 03:21 PM

These motors do make a little knocking sound, which is normal, but from the video, yours sounds a little more than most.

If you want to narrow it down, listen to the head with a stethoscope, and you can narrow it down between the head and the piston.

smokedlights · 02-22-2011, 10:28 PM

so valves are out of the question? It is a bit hard starting but the bike has pretty low hours, it sounds normal for about 5minutes until it is warm and i wrap it up, and then when it comes back down to idle it makes that noise.. heres another video... this is entirely warmed up..and the nosie is pretty presentable especially after i rev it and let it fall back down..

daddio · 02-22-2011, 10:31 PM

It sounds like mine did when the piston was hitting the head.

BTwrestle04 · 02-22-2011, 11:38 PM

Yeah, that is definitely not normal. I would start with the valves then the piston like mentioned above.

smokedlights · 02-22-2011, 11:40 PM

thats weird the thing has full power, and that noise really isnt present unless its just sitting ideling, sounds and performs normal, this might be weird but would lower octane fuel make it do that at all? I know these require atleast 91, and i have no idea what is in it, just bought it not too long ago

**husker525** · 02-23-2011, 01:50 AM

That is not the kind of engine knock that comes from low octane fuel. I would bet that you have a cracked piston skirt, if I had to guess. That sounds a lot like piston slap to me. Let's hope it is something minor, but I can't think of any knocking that is "minor"

Joester · 02-23-2011, 01:52 AM

that sounds god awful. i would pull the whole top end and have yourself a looksie.

jes9999 · 02-23-2011, 04:50 AM

My sons 08 Sounds just like that from new and still doses like in first video. My son has been running it for 2 years and racing it all last year. I,ve checked valves all in specs everything always looked good just have same noise at idle. The second video sounds worse and I don't have the noise after warmed up and reving it at idle it's still there. I'm doing a rebuild right now and nothing seems to look bad after 2 years, just normal wear. hope this helps but check everything just to be safe!

smokedlights · 02-23-2011, 12:20 PM

Im going to start with the oil and see what happends after that if its still noticeable, ill go with the 20-50

11B · 06-19-2011, 05:54 PM

i know this post is old but it was at the top of the list when i searched "knocking noise".. i got the exact same noise and its been there for quite a while. i only have bout 100 hrs or so on my motor but it hasnt always done it. i figured id have to replace some valve shims but when i checked.. they were all within spec. i did a lil carb cleaning and everything is working great except i still have that same exact knock. its good to know someone else has had it and it has been running same as new with it. i checked the oil also and there isnt a hint of metallic sheen or any shavings or anything.. aside from normal brassy colored clutch material.

jcappello1217 · 06-19-2011, 06:05 PM

what about your timing chain

yfz&f4i · 06-19-2011, 07:59 PM

mine does this too. i know i have hotcams in it, but after it's warm it will idle and make a sound similar to your first video. this has a brand new timing chain, piston, stage 2 cams

04yfzguy · 01-18-2012, 04:05 PM

Quote:

Originally Posted by smokedlights

so valves are out of the question? It is a bit hard starting but the bike has pretty low hours, it sounds normal for about 5minutes until it is warm and i wrap it up, and then when it comes back down to idle it makes that noise.. heres another video... this is entirely warmed up..and the nosie is pretty presentable especially after i rev it and let it fall back down..

i have had mine for a year and put at least 100 hours on it and has sounded the same way since day 1, and I ride the hell out of it!

David boad · 01-31-2012, 09:49 AM

Mine started doing this a while back its an 06 I was stumped couldnt find out what caused it and no one could tell me one day I threw caution to the wind and changed the water pump seals and shaft and the noise stopped then I created more confusion as to why the noise was there but after about 20 hours still no noise

highimpact · 01-31-2012, 11:25 AM

I don't know what that noise is but it is not correct. Yfz450 engines are extremely noisy but not that noisy. If it was mine I would be tearing into it to find and rectify. Locate either top end or bottom - sounds like top end (possible piston skirt issue) by just listening to the video. Use a stethescope as mentioned and good luck hunting.

snaggleto0th · 02-20-2012, 04:29 PM

mine has been doing this noise since day one ive been told by some local riders its normal for these engines. As ive said since I first really noticed the noise, just gonna wait for it to go boom and im sure ill find a problem somewhere, and my bike gets riden fairly hard too and theres no power loss/issues. everything is within spec valvetrain wise i almost just wanna replace the timing chain tensioner for shits and giggles. But why fix something that aint broke?

02-21-2011, 04:56 PM	#1 (permalink)
smokedlights Senior Member Join Date: Oct 2010 Posts: 99	Bike makes a ticking/knocking sound after warmed up for about 5 min? VIDEO Not sure if this is normal or not (havent had the bike long, starts up and sounds good until warm, then sounds like its knocking or ticking or something (metal-y noise), I've uploaded a video hopefully you can get a good sense of the noise through it, only really heard at idle, bike has full power and no smoke etc.. click picture to watch video..

02-22-2011, 02:48 PM	#2 (permalink)
motor490 Senior Member Join Date: Dec 2006 Location: NC Posts: 183	Have you checked your valves? __________________ '05 YFZ450 SE HMF Sport Slip-on Cam Mod

02-22-2011, 03:21 PM	#3 (permalink)
husker525 Police Patrol Join Date: Sep 2005 Location: Parker, Colorado Posts: 3,119	These motors do make a little knocking sound, which is normal, but from the video, yours sounds a little more than most. If you want to narrow it down, listen to the head with a stethoscope, and you can narrow it down between the head and the piston. __________________ TEAM TRIGGER RACING (Now sponsored by AMSOIL, Vickery Motorsports, MotoXNutrition,DZ Graphics, Engine Ice, DeRisi Racing, Team Ape, Cosworth Pistons, Hiper, Lonestar Racing. Terse 07 Race engine 2007 Blue YFZ: Venom 14:1 piston, Cam Mod, Jardine RT4 Exhaust, 175 main, 45 pilot, 04 needle 3rd clip/ 3 t Become a fan of Team Trigger Racing on Facebook!!!

02-22-2011, 10:31 PM	#5 (permalink)
daddio Senior Member Join Date: Feb 2004 Posts: 3,246	It sounds like mine did when the piston was hitting the head. __________________ Mechanic ITP & WORCS Pro #191 Daddio19@Gmail.com

02-22-2011, 11:38 PM	#6 (permalink)
BTwrestle04 Senior Member Join Date: Dec 2010 Location: Irving, TX Posts: 192	Yeah, that is definitely not normal. I would start with the valves then the piston like mentioned above. __________________ 2008 YFZ450 - Dasa Full System, Pro Taper Handlebars, Houser +1.5 Anti-vibe Steering Stem, GT Thunder A-Arms, HLS Elite Shocks, CCP Stabilizer, Pro Armor Front Bumper, Pro Armor Rear Grab Bar, GYTR Nerf Bars, Powermadd Handguards, TAG Glider Skidplate, Teixeira Tech Swingarm Skidplate, UPP Case Saver.

02-22-2011, 10:28 PM	#4 (permalink)
smokedlights Senior Member Join Date: Oct 2010 Posts: 99	so valves are out of the question? It is a bit hard starting but the bike has pretty low hours, it sounds normal for about 5minutes until it is warm and i wrap it up, and then when it comes back down to idle it makes that noise.. heres another video... this is entirely warmed up..and the nosie is pretty presentable especially after i rev it and let it fall back down..

02-22-2011, 11:40 PM	#7 (permalink)
smokedlights Senior Member Join Date: Oct 2010 Posts: 99	thats weird the thing has full power, and that noise really isnt present unless its just sitting ideling, sounds and performs normal, this might be weird but would lower octane fuel make it do that at all? I know these require atleast 91, and i have no idea what is in it, just bought it not too long ago

02-23-2011, 01:50 AM	#8 (permalink)
husker525 Police Patrol Join Date: Sep 2005 Location: Parker, Colorado Posts: 3,119	That is not the kind of engine knock that comes from low octane fuel. I would bet that you have a cracked piston skirt, if I had to guess. That sounds a lot like piston slap to me. Let's hope it is something minor, but I can't think of any knocking that is "minor" __________________ TEAM TRIGGER RACING (Now sponsored by AMSOIL, Vickery Motorsports, MotoXNutrition,DZ Graphics, Engine Ice, DeRisi Racing, Team Ape, Cosworth Pistons, Hiper, Lonestar Racing. Terse 07 Race engine 2007 Blue YFZ: Venom 14:1 piston, Cam Mod, Jardine RT4 Exhaust, 175 main, 45 pilot, 04 needle 3rd clip/ 3 t Become a fan of Team Trigger Racing on Facebook!!!

02-23-2011, 01:52 AM	#9 (permalink)
Joester Senior Member Join Date: Feb 2009 Location: High Ridge, outside St. Louis, MO Posts: 2,347	that sounds god awful. i would pull the whole top end and have yourself a looksie. __________________ 2007 YFZ450 Red/Gray - DMC Afterburner Comp full system - Pro Design Pro Flow intake and air filter - CP 12.75:1 piston - port work by Outlaw Innovations - Stage 2 HotCams - EHS Racing airbox lid - AC racing blackline nerfs - TAG metals black bumper - bent accelerator pump spring - Adjustable Fuel screw - Maxxis RAZRs all around - 15/38 gears

02-23-2011, 04:50 AM	#10 (permalink)
jes9999 Junior Member Join Date: Dec 2010 Posts: 28	My sons 08 Sounds just like that from new and still doses like in first video. My son has been running it for 2 years and racing it all last year. I,ve checked valves all in specs everything always looked good just have same noise at idle. The second video sounds worse and I don't have the noise after warmed up and reving it at idle it's still there. I'm doing a rebuild right now and nothing seems to look bad after 2 years, just normal wear. hope this helps but check everything just to be safe! Last edited by jes9999; 02-23-2011 at 04:55 AM.

02-23-2011, 12:20 PM	#11 (permalink)
smokedlights Senior Member Join Date: Oct 2010 Posts: 99	Im going to start with the oil and see what happends after that if its still noticeable, ill go with the 20-50

06-19-2011, 05:54 PM	#12 (permalink)
11B Member Join Date: Jan 2011 Location: el paso, tx Posts: 48	i know this post is old but it was at the top of the list when i searched "knocking noise".. i got the exact same noise and its been there for quite a while. i only have bout 100 hrs or so on my motor but it hasnt always done it. i figured id have to replace some valve shims but when i checked.. they were all within spec. i did a lil carb cleaning and everything is working great except i still have that same exact knock. its good to know someone else has had it and it has been running same as new with it. i checked the oil also and there isnt a hint of metallic sheen or any shavings or anything.. aside from normal brassy colored clutch material. __________________ -Billy 05 yfz 450.. stock no baffles 09 zx6r sold

06-19-2011, 06:05 PM	#13 (permalink)
jcappello1217 Senior Member Join Date: Feb 2011 Location: ohio Posts: 305	what about your timing chain __________________ my baby was stolen :( 04/05 YFZ 450: build in progress :(

06-19-2011, 07:59 PM	#14 (permalink)
yfz&f4i Banned Join Date: Mar 2010 Posts: 136	mine does this too. i know i have hotcams in it, but after it's warm it will idle and make a sound similar to your first video. this has a brand new timing chain, piston, stage 2 cams

01-31-2012, 09:49 AM	#16 (permalink)
David boad Senior Member Join Date: Jan 2012 Location: Perth, Western Australia Posts: 134	Ticking noise Mine started doing this a while back its an 06 I was stumped couldnt find out what caused it and no one could tell me one day I threw caution to the wind and changed the water pump seals and shaft and the noise stopped then I created more confusion as to why the noise was there but after about 20 hours still no noise

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01-31-2012, 11:25 AM	#17 (permalink)
highimpact Member Join Date: Oct 2011 Posts: 30	I don't know what that noise is but it is not correct. Yfz450 engines are extremely noisy but not that noisy. If it was mine I would be tearing into it to find and rectify. Locate either top end or bottom - sounds like top end (possible piston skirt issue) by just listening to the video. Use a stethescope as mentioned and good luck hunting.

02-20-2012, 04:29 PM	#18 (permalink)
snaggleto0th Senior Member Join Date: Mar 2011 Location: Hanford, CA Posts: 154	mine has been doing this noise since day one ive been told by some local riders its normal for these engines. As ive said since I first really noticed the noise, just gonna wait for it to go boom and im sure ill find a problem somewhere, and my bike gets riden fairly hard too and theres no power loss/issues. everything is within spec valvetrain wise i almost just wanna replace the timing chain tensioner for shits and giggles. But why fix something that aint broke? __________________