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General Category => General Discussion => Topic started by: WildGuzziNicholas on July 09, 2025, 06:38:26 PM

Title: What is this hole in the side of my bike?
Post by: WildGuzziNicholas on July 09, 2025, 06:38:26 PM
The bike is a 2007 Nevada 750
I was trying to remove the plug and accidentally popped the rubber plug inside the case. I tried using a bore scope to find the plug but it's no where to be found. Could this cause a issue if I continue to ride it? What would you recommend doing to retrieve the plug? Thanks.




(https://i.ibb.co/nM400NQ2/20250709-113136.jpg) (https://ibb.co/nM400NQ2)

(https://i.ibb.co/wNvkb9pQ/20250709-113119.jpg) (https://ibb.co/wNvkb9pQ)
Title: Re: What is this hole in the side of my bike?
Post by: drdwb on July 09, 2025, 07:07:08 PM
The hole allows you to view the flywheel and I think clutch plate, it where you look to set the timing. Lots of spinning parts in there to gum up. I wouldn’t leave it in there, and I wouldn’t put the transmission in gear or try to drive the bike until it’s out of there. But that’s just my opinion. Others may not agree, but you’ll want to plug that hole so no water and crap gets in there. Good luck, it’s like losing a guitar pick in the sound hole, but this could seriously mess up your bike.
Title: Re: What is this hole in the side of my bike?
Post by: Wayne Orwig on July 09, 2025, 07:14:23 PM
The flywheel will shred it. The rubber dust won't hurt a thing. It is to view the timing marks. But you really never need to view them. So, get a replacement plug and don't worry.
Title: Re: What is this hole in the side of my bike?
Post by: moto on July 09, 2025, 07:34:16 PM
I agree w Wayne. Part number GU93180220. MG Cycle has it in stock.

Title: Re: What is this hole in the side of my bike?
Post by: Dirk_S on July 09, 2025, 07:54:24 PM
I’d just flip the bike over and give it a good shaking until it falls out.
Title: Re: What is this hole in the side of my bike?
Post by: WildGuzziNicholas on July 09, 2025, 08:02:45 PM
Thanks for the replies and suggestions!
Title: Re: What is this hole in the side of my bike?
Post by: Pescatore on July 09, 2025, 08:18:25 PM
What a coincidence. I just did that last week by pushing too hard while putting the plug back on.
I was lucky to find it with a borescope.  I grabbed it with an extended gripper.
I was considering leaving it in there as well.
As others already said, the spinning clutch will throw it around and will likely sit at the bottom of the bell housing. That's where mine went, but I didn't start the engine.

Title: Re: What is this hole in the side of my bike?
Post by: John A on July 10, 2025, 09:30:49 AM
You can take the starter off to get it. The only time I've seen a problem with leaving it is on early EV with the sensor in the bellhousing. The hardened rubber can hit the sensor and destroy it
Title: Re: What is this hole in the side of my bike?
Post by: jrt on July 10, 2025, 10:03:24 AM
You could try fishing it out with a rubber magnet. :tongue:  Otherwise... as Wayne says- it won't hurt anything.
Title: Re: What is this hole in the side of my bike?
Post by: WildGuzziNicholas on July 10, 2025, 09:56:21 PM
You can take the starter off to get it. The only time I've seen a problem with leaving it is on early EV with the sensor in the bellhousing. The hardened rubber can hit the sensor and destroy it

Tried finding it via the starter and using a bore scope but couldn't find anything
Title: Re: What is this hole in the side of my bike?
Post by: Pescatore on July 11, 2025, 07:56:01 AM
It's probably inside the clutch bell/cup.  Turning the engine by hand might fall out.
Or spin the engine a few cycles without starting it and it might get thrown out.
Otherwise, forgetaboutit.
Title: Re: What is this hole in the side of my bike?
Post by: johnpaulcim on July 14, 2025, 03:28:40 PM
Did the same thing on my 2013 V7 years ago. I fretted about it for a while, then decided that it would just get chewed up into oblivion by the gears and there was nothing in there that it could hurt. A couple years and thousands of miles later, I had forgotten all about it till I read this thread....
Title: Re: What is this hole in the side of my bike?
Post by: Luap McKeever on July 15, 2025, 03:00:51 PM
Had that happen to me with a 98 EV. I left it in there. Eventually, the flywheel grabbed it and threw it up to break my sensor, rendering my bike broke down until I replaced that sensor. I think they've moved that sensor to a better location in the later models though.
Title: Re: What is this hole in the side of my bike?
Post by: faffi on July 15, 2025, 03:26:37 PM
My first thought was WTF, leave it in there, risking clogged oil passages? Then I remembered it runs a dry clutch. First bike with a dry clutch I have owned in 45 years of riding.