Author Topic: V85 valve adjustment gone wrong…  (Read 618 times)

Offline Beowulf

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V85 valve adjustment gone wrong…
« on: February 27, 2024, 12:26:40 PM »
So I was adjusting my valves today and as I was feeling for the piston coming up it snapped the plastic pen end I was using. Idiotic i know……

Deep breath….I have approximately a 1/4 inch of plastic in the right cylinder and no way to get it out. Should I disassemble the head to get it out? Will it do any harm? Thanks in advance for helping this idiot.

Offline Dirk_S

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Re: V85 valve adjustment gone wrong…
« Reply #1 on: February 27, 2024, 12:34:11 PM »
This is why I use a straw—I once used a chopstick and snapped the tip off. I initially ran the bike for a few cycles, thinking the chopstick tip would shoot out the exhaust, but I got paranoid enough and just decided to pop the head off. Mind you—that was wood. Don’t know if plastic would be worse, but if it stuck around long enough and heated up? Eww.

If you want to avoid pulling the cylinder head off, perhaps you could fish it out through the exhaust port?
« Last Edit: February 27, 2024, 12:49:21 PM by Dirk_S »
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Offline Dave Swanson

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Re: V85 valve adjustment gone wrong…
« Reply #2 on: February 27, 2024, 12:35:52 PM »
pull the plugs, and would be best to also remove the header on that side.  Then spin the starter.  If you get lucky it will pop out one of the 2 open holes.   

It might pop out the exhaust port easier because of the pressure release when the exhaust valve opens, so I would probably leave the plug in on that side.  No plug lead attached of course. 
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Offline bmc5733946

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Re: V85 valve adjustment gone wrong…
« Reply #3 on: February 27, 2024, 12:42:17 PM »
If you are going to use this method, one hand to turn the engine, one to keep the probe moving around to keep it from getting caught. Safety first!!!!!!!
I actually usually use a long thin screwdriver for this, believe it or not. Keeps me attentive!

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Re: V85 valve adjustment gone wrong…
« Reply #3 on: February 27, 2024, 12:42:17 PM »

Offline Rower30

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Re: V85 valve adjustment gone wrong…
« Reply #4 on: February 27, 2024, 12:55:37 PM »
pull the plugs, and would be best to also remove the header on that side.  Then spin the starter.  If you get lucky it will pop out one of the 2 open holes.   

It might pop out the exhaust port easier because of the pressure release when the exhaust valve opens, so I would probably leave the plug in on that side.  No plug lead attached of course.

Don't forget to ground the plug lead, some ignition systems frown on an open plug lead. Better to be safe and assume yours is one. Use an old plug lying around and ground it to the bike.
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Offline Beowulf

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Re: V85 valve adjustment gone wrong…
« Reply #5 on: February 27, 2024, 01:12:38 PM »
No need to ground the plug. Turned over fine. No sign of the broken piece. I’m guessing it passed through the exhaust already. Seems to turn over fine. Gina complete the valve check and go from there. I held the pen in my hand to prevent this but it did. I tried doing this gingerly but here I am.

I’m glad it’s a small plastic piece but wish it hadn’t occurred. There’s no way it’s still in there now.

Offline Beowulf

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Re: V85 valve adjustment gone wrong…
« Reply #6 on: February 27, 2024, 01:13:40 PM »
Any more thoughts I’ll hear them. Thanks

Offline Gliderjohn

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Re: V85 valve adjustment gone wrong…
« Reply #7 on: February 27, 2024, 02:43:54 PM »
Don't feel bad. Have done it on the T-3. Did pull the head but that is quite quick and simple on a T-3.
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Offline Beowulf

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Re: V85 valve adjustment gone wrong…
« Reply #8 on: February 27, 2024, 02:53:52 PM »
Don't feel bad. Have done it on the T-3. Did pull the head but that is quite quick and simple on a T-3.
GliderJohn

Appreciate it. Checked the valves. All were in spec and I didn’t end up needing to adjust them at all. I put it back together including the fuel tank I taken off to make sure the side covers cleared the engine guards.

Started it and ran for several minutes. No codes out noises or weird behavior. Going for a ride in a bit see and see what happens…. Feeling stupid but hopeful. I did several checks in the cylinder including blowing it out before turning it over with the starter.

Thanks for the tips. I let you know if I screwed up really bad.

Offline John A

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Re: V85 valve adjustment gone wrong…
« Reply #9 on: February 27, 2024, 07:26:48 PM »
Take a straw and put some glue from a sticky trap on the end and fish it out.
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Offline jrt

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Re: V85 valve adjustment gone wrong…
« Reply #10 on: February 27, 2024, 07:42:11 PM »
pull the plugs, and would be best to also remove the header on that side.  Then spin the starter.  If you get lucky it will pop out one of the 2 open holes.   

It might pop out the exhaust port easier because of the pressure release when the exhaust valve opens, so I would probably leave the plug in on that side.  No plug lead attached of course.

How much squish is there in the head?  I'd be worried about smashing the pen between piston and head/valves, then having 50 small pieces to pull out, rather than one big piece. 
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Offline Huzo

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Re: V85 valve adjustment gone wrong…
« Reply #11 on: February 27, 2024, 07:50:24 PM »
I would have been most concerned that a piece would have lodged on the valve seat and put a bending force on the stem as it was closing.
Anyway, if it’s run as long as it now has post disaster, the bit/s must have shredded, melted or otherwise disintegrated.
Since you have compression on both sides, nothing can be awry… :thumb:

Offline PJPR01

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Re: V85 valve adjustment gone wrong…
« Reply #12 on: February 27, 2024, 08:33:08 PM »
I'd get a vacuum cleaner and place it as flat as possible on the spark plug hole (obviously with the plug out) and see if it sucks anything out....
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Offline Beowulf

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Re: V85 valve adjustment gone wrong…
« Reply #13 on: February 27, 2024, 09:22:00 PM »
I would have been most concerned that a piece would have lodged on the valve seat and put a bending force on the stem as it was closing.
Anyway, if it’s run as long as it now has post disaster, the bit/s must have shredded, melted or otherwise disintegrated.
Since you have compression on both sides, nothing can be awry… :thumb:

Appreciate the tips. I attempted several methods to extricate the piece. I buttoned everything up and went for a 15 mile ride with no issues. I think that piece Is long gone. No unusual noises, lights or anything sinister.  Thank you everyone for the advice
« Last Edit: February 27, 2024, 09:29:32 PM by Beowulf »

Offline azccj

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Re: V85 valve adjustment gone wrong…
« Reply #14 on: February 27, 2024, 09:31:52 PM »
When I did the same thing but with a pencil, I blew compressed air into the spark plug hole. The broken off pencil shot out of the spark plug hole after a minute or so.
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Offline Willy59

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Re: V85 valve adjustment gone wrong…
« Reply #15 on: February 28, 2024, 04:04:42 AM »
In order to inspect the cilinder & valves,you can use an "small"endoscope (Ali express +/- 20 USD)
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