Getting crud out of pushrod tunnel

Due to 1 thing leading to another, I have taken the head off my MK3 850.
I have Maney Alloy barrels fitted, and the bores look good, with plenty of cross hatching and I dont really want to take them off.
There is a bit of crud fallen in the pushrod tubes onto the followers, anyone have any clever ways to get it out?
Any experience or smart solutions gratefully considered!
Cheers

Vacuum cleaner with thin tube attached using duct tape, use an empty bag so you can check all the crud has been collected.

Just make sure you do actually remove the crud. Even if it necessitates removing the barrels.

My 850 cam follower tunnels were scored to the point of making them unserviceable (I got around this by going the JS cam route).

I’m pretty convinced that it was crud from a previous life that caused this.

Clearly, with alloy barrels you’re even more at risk of crud related damage to the cam followers tunnels.

Once the crud is there it has nowhere to go apart from gradually grinding its way past the followers!

I like the vacuum cleaner idea but if you have one of those magnetic pointer things you might make a pass down there with it. It would be better if none of it came back on the magnet.

Fast Eddie said:

Just make sure you do actually remove the crud. Even if it necessitates removing the barrels.

My 850 cam follower tunnels were scored to the point of making them unserviceable (I got around this by going the JS cam route).

I’m pretty convinced that it was crud from a previous life that caused this.

Clearly, with alloy barrels you’re even more at risk of crud related damage to the cam followers tunnels.

Once the crud is there it has nowhere to go apart from gradually grinding its way past the followers!

Click to expand...

that is what concerns me!

Just bite the bullet and disassemble it! You'll feel a lot better about it afterwards, NOT worrying about whether you got all the crud out.

MexicoMike said:

Just bite the bullet and disassemble it! You'll feel a lot better about it afterwards, NOT worrying about whether you got all the crud out.

Click to expand...

Yeah, let’s face it, the hard bit is getting the head off, the barrels are easy, plus it gives you chance to inspect pistons, bores, cams, followers, etc too.

@ Johnny, I don’t think you’ve told us why you took the head off.. come on... don’t be shy...

ok, I will come clean. I had a bit of float in the (shimmed) timing side inlet rocker, so thought I would re-shim with head on the bike. .
6 times bronze shim slipped and was retrieved, taking a not inconsiderable time BTW.The 7th time it slipped over the edge into the exhaust rocker/pushrod area, it was not revealing itself, no matter what I tried. Even to the point of a bloody laptop and endescope...
After much wailing and gnashing of teeth I capitulated and off came the head.
Shim retreived, installed and well, you know the rest...