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Engine Mechanical TopicsDiscussion for motor builds, cams, head work, stripped bolts and other engine related issues. The good and the bad. If it goes round and around or up and down, post it here.
My 2017 Low Rider S is in the shop getting a FuelMoto 113 kit installed and they called me to come down because they found a rough edge on one of the cylinder spigots:
here is the one in question - see the jagged edge
Vs the smooth edge on the other one
Should I have them wait until Monday when FuelMoto opens and discuss, or is this irrelevant? Their concern is if the jagged bits are thin enough could vibrations cause bits to fall off into the crankcase.
I thought why not just smooth it out with a file or dremel, but I'm not an engine guy...
Im no motor guy either but i wouldnt be able to sleep knowing that was like that lol. Maybe its fine but knowing how fuelmoto is if you call them theyll probably overnight you a new one.
I don't think it's a chip, It's more more than like clearance cut. As far as I can tell, they simply forgot to debur/chamfer the cylinder after honing.
I don't think it's a chip, It's more more than like clearance cut. As far as I can tell, they simply forgot to debur/chamfer the cylinder after honing.
Yes, those are definitely clearance cuts for where the cylinders (almost) meet in the case. However if they indeed forgot a step, I dont want this jug. My real concern is if these are supposed to be precisely machined, I would expect them to be identical. It looks almost like this was over-bored and the edge of the sleeve was compromised from going too thin. But again, what do I know.
Ill talk to Jamie on Monday. I have no doubt hell make it right. Just pisses me off that the bike has to sit for what will probably amount to a week, when I was expecting to be done today.
Just to add, after seeing this cutaway, it clearly shows the piston skirt passing over the rough area of the spigot. All it would take is a tiny bit of that jagged edge to break off to score the cylinder and possibly toast the motor.
its just the edge being sharp from being bored,(the actual relief is were the cylinders come close together and is machined at the factory),the sharp edge should have been cleaned up before they left FM but are not a big deal at all,just smooth it a bit with some sand paper (a flap wheel on a dremel tool would be perfect)
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chipped sleeve on big bore kit
