So I took my bike out for a ride on Wednesday, banged it through the gears, all was well, as it has been since I changed my oil after my last track day on December 2nd. I've done probably 500 miles since then on the street, with many, many redline shifts. I went to drain my oil not too long after my ride, and I ended up with this chunk of metal in my drain pan, which was 100% clean before I broke the plug loose. Needless to say, I was alarmed. After reinstalling the plug and refilling the sump, I fired her up and let her idle. No weird noises, no oil pressure light, no signs of anything out of the ordinary. Ran her through the gears on my pit stand and everything felt normal. Revved her up to about 8K, all still normal. Shut her off and she has been sitting since. I spent the last two days looking at disassembled Daytona engines, transmissions and cases, and have not been able to match this piece to anything within any of them. It was machined on every side that wasn't broken, so I figure it chipped off the edge of something. It is also magnetic, and it has a very slight curve to it. After looking at so many photos and finding no surface or edge remotely similar to this piece, I'm not entirely sure it even came from my engine. It could very well have been stuck against my engine and been knocked loose when I broke the drain plug loose, which was fairly tight and all I had to use was a short 1/4" ratchet. However, not ruling out that it came from the engine. Anyways, does anyone with more knowledge about the internals of a Daytona 675 engine have any idea where this might have come from and how concerned I should be on a scale of 1 to source a new engine? I'm going to drop the oil pan this week and check out if there is any more metal in it, but would like to get as much insight as possible before I start pulling case covers off or drop the motor. Thanks for any help! Bike is a 2006 Daytona 675 with just under 29K miles. Valves were done at 24K.
4th picture has machining marks. I would guess a piece from a gear based on that alone. Drop the pan and see whats inside that would be the easiest step, I personally would be splitting the case if I saw that in my oil though.
Steel or aluminum. If it's aluminum then my guess is part of the clutch. Those machine marks look like aluminum fracture. However if he's right and it's part of a gear-maybe an engagement dog-then it should be steel. Just test it with a magnet.
It is magnetic, so it can't be aluminum. I thought it could be part of a dog or something, but I think it's too big and not shaped correctly. Also, I have no transmission issues. The bike shifts into all gears and holds them without issue. Nonetheless, the pan is coming off and I'll see what else I find in there.
Dog boxes are really quite strong. My concern now would be what is structurally weakened. Dropping the pan will show you any more broken bits bit the only way to do a true inspection is to open the gear box unfortunately :/
Yeah see what you find. it still looks more like a clutch part to me. Maybe the pressure plate. the machined lip makes me think of clutch parts but I could be wrong. Really it's more likely to be a transmission part. It just doesn't look like a tooth or an engagement dog.
Okay, thank you all for the input. I'll let you guys know what I find when I pull the clutch cover and drop the oil pan. Fingers crossed there is a chunk of my pressure plate missing.
Forgot to give you all an update on this. So, I pulled all the case covers off and the oil pan and got under the bike with a flashlight. I was able to check mostly everything with the exception of one of the transmission shafts, being it is out of view, and nothing looked out of sorts in that regard. Clutch looked great, stator was good, timing chain and area good. However, I did notice that there was a large patch of JB Weld on the inside of the engine casing just ahead of the front sprocket. I took the sprocket cover off and, sure enough, JB weld just in front of the sprocket. When I pulled the oil pan off, there was no gasket, just silicone sealant. There were a few very small bits of metal in the pan, but nothing close to the size of the piece that drained out. I came to the conclusion that this piece of metal was a piece that had been sitting in the pan from the case being fractured, or the previous owner being a dipsh0t and accidentally dropping the metal in the pan while putting it back together. After talking it over with a buddy of mine who builds engines, he said he would just slap it back together, given it wasn't giving me any trouble beforehand. So, I did. Bike runs just as great as it always has. I've put around 700 miles on it since without issue. Gearbox works great, engine spins all the way up to redline smoothly while fully loaded. From the time I had bought it, it would make this loud buzzing sound if I went WOT in any gear below 5500rpm. Now, it doesn't! I'm going to ride it until I need to rebuild, and I will pick up another engine case when that time comes that is fully intact.
You should order the gasket. It's actually an oil slosh baffle as well as a gasket. Seeing as you have an older bike you want the kit that comes with the updated pressure relief valve.
Sorry, should have mentioned that when I reassembled I used new gaskets from my dealer, and as I'm sure you know the sump gasket with the baffle and the new PRV is the only one they make now. When I got it and looked at it I was confused, but then it made sense of why the gasket "kit" is so expensive. Luckily I had this forum as a resource. It was easy to figure out after a search!
Sadly, it is time to update this thread. After over two years and another 4k miles, another piece from what looks like the same component has worked it's way out of the bike through the oil. It's quite a bit smaller than the last one. Bike still runs totally fine, like it always has. I have a leak coming from the o-ring around the oil/water pump drain tube so I'll be dropping the pan later this week and will take another look. I might also try out a cheap borescope I bought a while ago to check out the gearbox.
When I found the first piece, I pulled the clutch, timing, and stator covers and found everything in tact, and nothing that remotely resembled what this came off. The attached photo shows the new piece (left) compared to the original piece. Any guesses?
Also worth noting the pieces do not line up in any way, just based on the variety of finishes, material, and my bike's prior history, I assume it must be off the same part.
Sent from my iPhone using Tapatalk
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Triumph 675 Forums
1.2M posts
39.9K members
Since 2005
A forum community dedicated to Triumph 675 owners and enthusiasts. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!