What's this odd sound?

cuong-nutz · May 2nd, 2013, 08:02 AM

Valves tapping?

Also running on 87 octane. I forgot to bump it up. Looks like I need to bump up the mains as well. Currently using 40 pilots and 110 mains with stock air box. SAE 30 oil.

edit:

Link to original page on YouTube.

subxero · May 2nd, 2013, 08:32 AM

do you have a vid, or a similar vid of the sound or at least describe the sound?

alex.s · May 2nd, 2013, 08:52 AM

from listening to your sound from here at my desk, i would say that sound is DEFINITELY an air conditioner.

lgk · May 2nd, 2013, 08:53 AM

running lean?

used 112 jets when i had a k&n filter and carbs at sea level.

you should using at least 115s at the minimum.

cuong-nutz · May 2nd, 2013, 09:18 AM

Quote:

Originally Posted by subxero

do you have a vid, or a similar vid of the sound or at least describe the sound?

Forgot to post it

subxero · May 2nd, 2013, 09:23 AM

Not 100% which sound but maybe cam chain? maybe your CCT is loosing tension? When you were on the right side of the bike by the Cam Chain i could hear it but again not sure if that is what you are talking about and it didn't sound terrible.

alex.s · May 2nd, 2013, 09:33 AM

it sounds like 2 things. your cam chain hitting the chain guide. probably stretched. and also one or two of your intake valves is way loose. like WAY loose.

also there is another sound... not sure what it is... maybe the clutch or crank. its an odd wobble. hard to tell, could be background noise.

cuong-nutz · May 2nd, 2013, 09:48 AM

Quote:

Originally Posted by alex.s

it sounds like 2 things. your cam chain hitting the chain guide. probably stretched. and also one or two of your intake valves is way loose. like WAY loose.

also there is another sound... not sure what it is... maybe the clutch or crank. its an odd wobble. hard to tell, could be background noise.

Damn, looks like I have to check the clearances again.

cuong-nutz · May 2nd, 2013, 01:37 PM

I think I found the problem. Not timed:

Because I forgot to install this:

Found it missing and found it under my pile of rags.

subxero · May 2nd, 2013, 02:34 PM

^
Are you missing some teeth on the cam sprocket/gear or just the way it looks?

dino74 · May 2nd, 2013, 02:40 PM

Quote:

Originally Posted by cuong-nutz

Currently using 40 pilots and 110 mains with stock air box.

110 Mains with stock air box seems way too rich.

Most people I know are running 92 to 98 with stock airbox.

alex.s · May 2nd, 2013, 03:39 PM

bahahahahahah! nice one.

mgentz · May 2nd, 2013, 04:40 PM

ouch. Hopefully you didn't ruin anything.

cuong-nutz · May 2nd, 2013, 04:59 PM

Quote:

Originally Posted by dino74

110 Mains with stock air box seems way too rich.

Most people I know are running 92 to 98 with stock airbox.

I'm bored out to 265cc

Quote:

Originally Posted by subxero

^
Are you missing some teeth on the cam sprocket/gear or just the way it looks?

It's just the shadow that makes it look like it's missing teeth.

Quote:

Originally Posted by alex.s

bahahahahahah! nice one.

It was an epic fail.

Quote:

Originally Posted by mgentz

ouch. Hopefully you didn't ruin anything.

yeah I should be ok it just jumped a tooth on both cams. Anymore might have been bad.

alex.s · May 2nd, 2013, 05:06 PM

Quote:

Originally Posted by cuong-nutz

I'm bored out to 265cc

It's just the shadow that makes it look like it's missing teeth.

It was an epic fail.

yeah I should be ok it just jumped a tooth on both cams. Anymore might have been bad.

i *think* with this engine skipping a tooth slowly like in your case, it will stop firing before the valves hit. so you would have to jump timing with the bike in gear & moving or use the starter to bend a valve from bad timing right? maybe wrong with this engine.

cuong-nutz · May 3rd, 2013, 04:55 PM

Damn the noise is still there and I'm having trouble with the transmission shifting.?!

Link to original page on YouTube.

cuz · May 3rd, 2013, 08:29 PM

bump

cuong-nutz · May 5th, 2013, 06:32 PM

I'm thinking my chain is stretched. I'll have to measure it tomorrow. The cam chain guide I forgot was on the exhaust side but it should be okay since the exhaust side chain is under tension since the engine rotates counter clockwise. Odd thing is why does the FSM say to rotate clockwise? I attached the section 2-22 where it states so.

Either way, I am willing to attempt to replace the chain without splitting the case. What prevents you from replacing the cam chain is the guide/stay loop thing. I could grind at it and cut it out to where the chain can get through and loop around.

Only issue is I'm having shifting issues. I can shift into first but afterwards I hit a hard false neutral trying to shift into second and same goes trying to get into first.

mgentz · May 5th, 2013, 07:36 PM

I believe you rotate clockwise to keep the flywheel bolt from coming undone.

Keep us updated on the progress.

cuong-nutz · June 3rd, 2013, 03:56 PM

Well I found the source of the noise.........

The pistons were slapping against the exhaust valves and head. 1-2 tooth retarded on the exhaust cam? I'm surprised the motor even ran as it is which leaves me wondering if the exhaust valves are now bent. I didn't check piston to valve to head clearances before closing everything up

Now I got to recheck all the bearings to make sure I didn't damage them.... Joyous me.

mgentz · June 3rd, 2013, 05:04 PM

How did you end up 1-2 teeth off? Did you line everything up per the manual?

Sorry to see but glad you found it early.

May 2nd, 2013, 08:02 AM	#1
cuong-nutz RIP Alex Name: Cuong Location: Houston, TX Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot. Blog Entries: 2	What's this odd sound? Valves tapping? Also running on 87 octane. I forgot to bump it up. Looks like I need to bump up the mains as well. Currently using 40 pilots and 110 mains with stock air box. SAE 30 oil. edit: Link to original page on YouTube. __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days Last futzed with by cuong-nutz; May 2nd, 2013 at 09:19 AM.

May 2nd, 2013, 08:52 AM	#3
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	from listening to your sound from here at my desk, i would say that sound is DEFINITELY an air conditioner. __________________________________________________
	1 out of 1 members found this post helpful.

May 2nd, 2013, 08:53 AM	#4
lgk ninjette.org certified postwhore Name: Jason Location: Norfolk, VA Join Date: Dec 2011 Motorcycle(s): 2012 EX250, 2014 EX300 Posts: A lot.	running lean? used 112 jets when i had a k&n filter and carbs at sea level. you should using at least 115s at the minimum. __________________________________________________ Ethioknight Memorial Fund- Sticker sale http://www.ninjette.org/forums/showthread.php?t=111700

May 2nd, 2013, 09:33 AM	#7
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	it sounds like 2 things. your cam chain hitting the chain guide. probably stretched. and also one or two of your intake valves is way loose. like WAY loose. also there is another sound... not sure what it is... maybe the clutch or crank. its an odd wobble. hard to tell, could be background noise. __________________________________________________
	1 out of 1 members found this post helpful.

May 2nd, 2013, 01:37 PM	#9
cuong-nutz RIP Alex Name: Cuong Location: Houston, TX Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot. Blog Entries: 2	I think I found the problem. Not timed: Because I forgot to install this: Found it missing and found it under my pile of rags. __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days

May 2nd, 2013, 08:32 AM	#2
subxero dirty boy Name: Joe Location: Johnstown, PA Join Date: Sep 2012 Motorcycle(s): I don't even know anymore?? Posts: A lot. MOTM - Apr '14	do you have a vid, or a similar vid of the sound or at least describe the sound?

May 2nd, 2013, 09:23 AM	#6
subxero dirty boy Name: Joe Location: Johnstown, PA Join Date: Sep 2012 Motorcycle(s): I don't even know anymore?? Posts: A lot. MOTM - Apr '14	Not 100% which sound but maybe cam chain? maybe your CCT is loosing tension? When you were on the right side of the bike by the Cam Chain i could hear it but again not sure if that is what you are talking about and it didn't sound terrible.

May 2nd, 2013, 02:34 PM	#10
subxero dirty boy Name: Joe Location: Johnstown, PA Join Date: Sep 2012 Motorcycle(s): I don't even know anymore?? Posts: A lot. MOTM - Apr '14	^ Are you missing some teeth on the cam sprocket/gear or just the way it looks?

May 2nd, 2013, 03:39 PM	#12
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	bahahahahahah! nice one. __________________________________________________

May 2nd, 2013, 04:40 PM	#13
mgentz Board Member Name: ... Location: WI Join Date: Dec 2011 Motorcycle(s): 250R (street), 250R (dirt) Posts: A lot.	ouch. Hopefully you didn't ruin anything.

May 3rd, 2013, 04:55 PM	#16
cuong-nutz RIP Alex Name: Cuong Location: Houston, TX Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot. Blog Entries: 2	Damn the noise is still there and I'm having trouble with the transmission shifting.?! Link to original page on YouTube. __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days

May 3rd, 2013, 08:29 PM	#17
cuz cuz Name: Israel Location: Houston (me) Galveston Join Date: Jul 2011 Motorcycle(s): 09 ninja 250r Posts: A lot.	bump __________________________________________________ THE GOOD LIFE

May 5th, 2013, 07:36 PM	#19
mgentz Board Member Name: ... Location: WI Join Date: Dec 2011 Motorcycle(s): 250R (street), 250R (dirt) Posts: A lot.	I believe you rotate clockwise to keep the flywheel bolt from coming undone. Keep us updated on the progress.

June 3rd, 2013, 03:56 PM	#20
cuong-nutz RIP Alex Name: Cuong Location: Houston, TX Join Date: Apr 2011 Motorcycle(s): '10 250r, '09 265r Posts: A lot. Blog Entries: 2	Well I found the source of the noise......... The pistons were slapping against the exhaust valves and head. 1-2 tooth retarded on the exhaust cam? I'm surprised the motor even ran as it is which leaves me wondering if the exhaust valves are now bent. I didn't check piston to valve to head clearances before closing everything up Now I got to recheck all the bearings to make sure I didn't damage them.... Joyous me. __________________________________________________ HalfFast Racing Team Serving Greater Houston Area Riders:WFO Riders MotoHouston HPC CMRA Ride Smart Fastline Lone Star Track Days

June 3rd, 2013, 05:04 PM	#21
mgentz Board Member Name: ... Location: WI Join Date: Dec 2011 Motorcycle(s): 250R (street), 250R (dirt) Posts: A lot.	How did you end up 1-2 teeth off? Did you line everything up per the manual? Sorry to see but glad you found it early.

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