Solved GSXR250 - Brown chunks caught in oil strainer?!

Hi all

Would be grateful for the advice of more experienced members!

With the oil pan still removed from my GSXR250, I noticed something caught by the mesh of the oil strainer.






So I removed the strainer, shook it about, and this is what came out...






Other than the above, the oil pan was pretty clean with no other debris to report.

At first I thought these brown chunks were oil that solidified within the oil strainer, because some of the edges seem to have a rounded form to them.

But after a bit or research, perhaps they are pieces of plastic timing chain guide?

Would be grateful to get your views on:

1. What you think the pieces are?
2. What you would do next?

 

Thanks for the tips Linkin and Murdo!

Your suggestions helped me find a photo online from a GJ72a which shows very similar looking plastic pieces behind the generator cover:




Also it's reassuring to hear I'm not the only one who's found this CobraBaz.
If yours was ok after you kept riding it, I might do the same.

That's a good question... Which I can't answer as I haven't actually ridden the bloody thing yet!
Something to bear in mind and test when it's back on the road though.


Seeing as the bike is currently sitting dry with the sump off, would it be worth taking the cover off and seeing what else is floating around in there? (assuming a just un-doing a few bolts)

Or is this unnecessary / asking for trouble?!

 

What a happy coincidence! Would be very interested to see what you find.

If the generator cover gasket is anything like the sump gasket I removed, after 34 years it will be toast.

Having learned how hard it is to find some of the parts for these bikes, I'm now in the habit of finding replacements before I break anything!

Not sure about the specifics for the Cobra, but the GJ72a and GJ73a part numbers are the same: 11483-05C00 (apparently now replaced by 11483-11D00), which Fowlers Parts have for £11.

If mine's off the road that long I'm setting fire to it.

 

Awesome, that's a great photo, thanks Cobrabaz!

That is clearly the source of the plastic particles that found their way into my oil strainer.

I will remove the same cover from my bike tomorrow to see how much more is floating around and whether there's any left in place!

 

Took the generator cover off yesterday...



There was a distinct lack of insulation around the stator, with what remained looking very similar to what was caught by the oil strainer.

So well spotted Murdo and Linkin and thanks for your advice.
Thread topic now updated to 'Solved'!

Interesting how when searching for a replacement part no. 31402-05C00, the insulation is a different colour:


I wonder if it's better!



Moving on to the state of the magnets...





There are a couple of cracks already formed.

What's the procedure Simon, add some high-temperature sealant to the crack directly and around the base of the damaged magnets?

Try and get a replacement stator because it's only a matter of time before this one detonates?

Would TIG welding the cracks be a stronger alternative?

Best just to get another bike?!

 

Ok well nobody has said to get another bike, so I'll continue with this one for the time being.

It's a GSXR250 (GJ72a), CobraBaz. You're right, I think a replacement 'rotor assembly' (31402-05C00 as shown in a previous post) is around £300.

To answer my previous question, I think welding isn't mentioned much in relation to this fix because it could interfere with the strength of the magnets.

Didn't realise that stator magnet movement was such a common thing until reading some other forums about the Suzuki SV...
Using the search terms 'JB weld stator magnets' brings up quite a few threads!

As helpfully suggested in this thread, I'll put some heat and oil resistant epoxy glue around the magnets (in place of the original insulation that disappeared into the oil strainer) to reduce the chance of the cracked magnets coming loose. I'll then check that everything is charging ok once the bike is back together and see how it holds up over time.