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Only $10 for all 2024 SX, MX, and SMX series (regularly $30).
3 options tap it
heli coil
buy new cases
if its to close to frame take the motor out
you have to take it out anyways
The Shop
Curious how this turned out? Did you buy the time sert set? M10x1.25x16 size?
Just be very careful, just did a complete engine rebuild on a customers bike (17 KX250F) because they put a helicoil in the oil drain. It pushed the shavings into the case and the oil pump sits right beside the drain and it sucked all the aluminum up into the oil pump causing oil pump to fail.
I ended up drilling and tapping the hole one size bigger while I had the cases apart to fix it. Could have welded it up but there was plenty of material in the casting to go a couple sizes bigger if needed.
You can buy repair kits at auto part stores.
Helicoils are stronger. Stronger than the original “tapped into alloy” - hence their use in HiPo applications.
Timeserts are for things that are removed regularly, like drain plugs.
I’m proud of a repair I did on a vintage RM125 fork with a Timesert. Put in from the out side, it would tend to tighten up (if anything) as the axle screws in. The first time I’d come across them.
Back to the original issue - engine probably has to come out.
I went thru this on a yamaha too. Granted this post is several years old...but a few thoughts:
Engine removal felt like it'd be a big deal. Yeah it took a couple hours. I don't see how you can get around it. Looking back, it wasn't THAT bad.
There's not much material at that location on a yamaha case (which is a real bummer, it severely limits the options), but I was able to tap the next size up. It's been holding up since then but I'm real gentle on it.
There's no real pressure exerted on that bolt. It's a critical critical bolt to stay in place, but it's not gonna see any stress or (significant) force exerted on it from inside this case. Seems like the concerns about strength are a bit overblown.
Good point - some people do the drain plug up like it holds the bike together.
We lockwire them for road racing/Supermoto. Best of both worlds- just a light “nip up”, but you know it can’t fall out.
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