Intake valves? Need diagnosis - video/audio provided

hotshot38 · 06-19-2015, 11:53 AM

2005 GZ250 7500 miles (bought it with 4500 miles)
So, I was driving down the highway to work a couple of days ago...about 70mph for 5 mins, gave it a bit more throttle to get around a car and all of a sudden I lost power. No significant sound, just like it ran out of gas, but without all the sputtering. I was able to glide to the side of the highway and wait for AAA.

Here's the video of the 'clicking' sound it makes when I turn it over.

A video of the moment it broke down:

I used a stethoscope to determine the sound is most prominent near the intake valves. I removed the cover and they are still moving up and down while cranking.

Recent work:
Valve adjustment 500 miles ago. - ran fine, lots more power
Carb Clean 100 miles ago - starts awesome....no more 10 minute choke sessions
Changed air cleaner
Changed oil 50 miles ago (yes, there is oil up near the intake valves when I took the cover off)
Bike ran PERFECT for the last 100 miles since the carb cleaned. Golden pipes and nice color on the spark plug.

Steps taken:
- yes, gas going to float bowl
- yes, spark

Any help appreciated on the cost and complication of doing a valve job or worse.

Thanks,
Sean
- mechanically competent, but not a mechanic, and certainly don't have the tools for an engine rebuild.
(Also, I own a 1988 Goldwing GL1500/6) but the GZ is more fun to drive!

blaine · 06-19-2015, 03:34 PM

Sounds like little to no compression.I'm thinking bent or broken valve.

spldart · 06-19-2015, 09:32 PM

Well. Poop!
I'm continuing to lose compression on mine slowly but surely.
I'm starting to think these little 250's should never be on the highway.
Valves adjusted, fresh oil and everything.

Start with compression test.
If low/none check for at least some valve/rocker clearance at no lift.
If you have clearance at no lift intake and exhaust but no/little compression then it's time to
dismantle motor.

I'm thinking my motor is heading where your's is right now

spldart · 06-19-2015, 09:37 PM

Actually. It does sound like a valve train problem while cranking doesn't it?

Still. An autopsy is needed.

Quote:

Originally Posted by blaine

Sounds like little to no compression.I'm thinking bent or broken valve.

hotshot38 · 06-19-2015, 10:48 PM

Thanks guys. Now that the weekend is here I'll investigate further. I just got my motorcycle lift put together. Was going to use it to change the speedo gears on the Goldwing, but now I get a chance to practice using it on the lighter bike first. Hmmmm...now where did I put those tiedowns.

Water Warrior 2 · 06-20-2015, 12:13 AM

Just be thankfull you were in little to no traffic when the bike quit. That could have been a real game changer for a safe stop.

In the video the starter sure whirls it over fast enough to catch. Just a different idea..............did you check for spark at the plug yet?? An ignition part may be a lot easier than an engine teardown.

hotshot38 · 06-20-2015, 11:28 AM

Yes, definitely spark. In fact, I believe I still had the spark plug out when I recorded the video. Although, it turned over just as easy/fast whether the plug was in and out.

I work an early shift and live in the opposite direction that the main traffic. On purpose; I hate traffic. This was 635am and as you can see, the traffic coming the other way was a bit heavier. And of course, I could have pulled to the left shoulder, although not as comfy or safe there.

Here's a vid of AAA picking me up:
I appreciated that they brought a trailer. Last time I needed a bike towed back in the 80's, they picked it up with the hook. Something I wouldn't want them to do with my Goldwing.

WJTED1 · 06-22-2015, 01:15 PM

Hello...this is EXACTLEY..what happened to mine 8 days agao..but I heard a pop sound..it makes the same clicking sound now as does yours. 2 weeks previous to this mine was sending out some white smoke at start up. I have posted on this also and just need to find the time to take the engine out. Cyclepedia has a great step by step to pull the engine. It's a subscription. Good luck!

hotshot38 · 06-22-2015, 03:23 PM

Thanks for that WJTED1. I haven't had a chance to look at it since it rained most of the weekend. I'm trying to figure out whether it's worth fixing or not. I haven't lapped a valve in probably 30 yrs.

WJTED1 · 06-22-2015, 03:54 PM

I don't know how long the threads stay open but I will update this thread when I get the engine off. I want to learn what happened but I am like you..it might not be worth it to fix it.

Sent from my iPad using Tapatalk

06-19-2015, 11:53 AM	#1
hotshot38 Junior Member Join Date: May 2014 Location: San Antonio, TX Posts: 11	Intake valves? Need diagnosis - video/audio provided 2005 GZ250 7500 miles (bought it with 4500 miles) So, I was driving down the highway to work a couple of days ago...about 70mph for 5 mins, gave it a bit more throttle to get around a car and all of a sudden I lost power. No significant sound, just like it ran out of gas, but without all the sputtering. I was able to glide to the side of the highway and wait for AAA. Here's the video of the 'clicking' sound it makes when I turn it over. A video of the moment it broke down: I used a stethoscope to determine the sound is most prominent near the intake valves. I removed the cover and they are still moving up and down while cranking. Recent work: Valve adjustment 500 miles ago. - ran fine, lots more power Carb Clean 100 miles ago - starts awesome....no more 10 minute choke sessions Changed air cleaner Changed oil 50 miles ago (yes, there is oil up near the intake valves when I took the cover off) Bike ran PERFECT for the last 100 miles since the carb cleaned. Golden pipes and nice color on the spark plug. Steps taken: - yes, gas going to float bowl - yes, spark Any help appreciated on the cost and complication of doing a valve job or worse. Thanks, Sean - mechanically competent, but not a mechanic, and certainly don't have the tools for an engine rebuild. (Also, I own a 1988 Goldwing GL1500/6) but the GZ is more fun to drive! Login or Register to Remove Ads Last edited by hotshot38; 06-19-2015 at 12:27 PM.
	0

06-19-2015, 03:34 PM	#2
blaine Senior Member Join Date: Feb 2010 Location: P.E.I. Canada Posts: 3,784	Sounds like little to no compression.I'm thinking bent or broken valve. __________________ If at first you do succeed, try not to look surprised.
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06-19-2015, 09:32 PM	#3
spldart Senior Member Join Date: May 2015 Location: Stafford, Texas Posts: 604	Well. Poop! I'm continuing to lose compression on mine slowly but surely. I'm starting to think these little 250's should never be on the highway. Valves adjusted, fresh oil and everything. Start with compression test. If low/none check for at least some valve/rocker clearance at no lift. If you have clearance at no lift intake and exhaust but no/little compression then it's time to dismantle motor. I'm thinking my motor is heading where your's is right now Login or Register to Remove Ads
	0

06-19-2015, 10:48 PM	#5
hotshot38 Junior Member Join Date: May 2014 Location: San Antonio, TX Posts: 11	Thanks guys. Now that the weekend is here I'll investigate further. I just got my motorcycle lift put together. Was going to use it to change the speedo gears on the Goldwing, but now I get a chance to practice using it on the lighter bike first. Hmmmm...now where did I put those tiedowns. Login or Register to Remove Ads
	0

06-20-2015, 12:13 AM	#6
Water Warrior 2 Senior Member Join Date: Dec 2006 Location: Squamish B.C Canada Posts: 11,409	Just be thankfull you were in little to no traffic when the bike quit. That could have been a real game changer for a safe stop. In the video the starter sure whirls it over fast enough to catch. Just a different idea..............did you check for spark at the plug yet?? An ignition part may be a lot easier than an engine teardown.
	0

06-20-2015, 11:28 AM	#7
hotshot38 Junior Member Join Date: May 2014 Location: San Antonio, TX Posts: 11	Yes, definitely spark. In fact, I believe I still had the spark plug out when I recorded the video. Although, it turned over just as easy/fast whether the plug was in and out. I work an early shift and live in the opposite direction that the main traffic. On purpose; I hate traffic. This was 635am and as you can see, the traffic coming the other way was a bit heavier. And of course, I could have pulled to the left shoulder, although not as comfy or safe there. Here's a vid of AAA picking me up: I appreciated that they brought a trailer. Last time I needed a bike towed back in the 80's, they picked it up with the hook. Something I wouldn't want them to do with my Goldwing.
	0

06-22-2015, 01:15 PM	#8
WJTED1 Junior Member Join Date: Aug 2013 Location: Columbus Posts: 12	Hello...this is EXACTLEY..what happened to mine 8 days agao..but I heard a pop sound..it makes the same clicking sound now as does yours. 2 weeks previous to this mine was sending out some white smoke at start up. I have posted on this also and just need to find the time to take the engine out. Cyclepedia has a great step by step to pull the engine. It's a subscription. Good luck!
	0

06-22-2015, 03:23 PM	#9
hotshot38 Junior Member Join Date: May 2014 Location: San Antonio, TX Posts: 11	Thanks for that WJTED1. I haven't had a chance to look at it since it rained most of the weekend. I'm trying to figure out whether it's worth fixing or not. I haven't lapped a valve in probably 30 yrs.
	0

06-22-2015, 03:54 PM	#10
WJTED1 Junior Member Join Date: Aug 2013 Location: Columbus Posts: 12	I don't know how long the threads stay open but I will update this thread when I get the engine off. I want to learn what happened but I am like you..it might not be worth it to fix it. Sent from my iPad using Tapatalk
	0