That cylinder will rip if you port it right. I got that same Samger 49 mm and that is a iron sleeve. The whole cylinder is isn't iron though LOL only the cylinder bore bro.
I don't recall I ever said "the entire cylinder including the ports and the external casting is iron" This was more of a test, it does rip though. The port timing isn't the best, the exhaust needs to be raised more in order to have a "better blowdown" because as of right now my blowdown is pretty low. I wanted to clean out the intake and exhaust ports. What needed the most work was the transfer ports, it was BAD. 4.5mm lip on top, approx 5mm of material removed from each side. This wasn't me widening the transfer ports, it was to match it to the transfers themselves if the casting wasn't so bad. The cylinder on one side needed to be matched to the crank case. It was more experimental than anything. I can buy the same $23 Samger listing but from AliExpress (cheaper due to Amazon has higher seller fees) and I want to experiment with some different port maps.
@@MikeNBikes I'm really curious on the ld100 cylinder. Got to have a yd100 bottom though. Also sorry I heard you say" it's supposed to be a aluminum and it is iron".
@@JamesPiccone Ah I follow, context my guy. I meant it in regards to "the norm is aluminum, therefor, should be aluminum, right?" that's what I meant. I'm following you though. The LD100 is a great concept, but there is one major flaw and it's the face of the exhaust port. There is zero mating surface for a gasket. If you look at the photos, there is barely any "meat" on the face of the port. I don't know too much about it and it's still a newish engine and overtime more and more information will come out from people who've purchased it. Bicycle-Engines has released a two piece YD100 as a "Zeda" product. Once again, still a new product and overtime more information from buyers will come out. Quick question, do you have the port map to the 49mm engine you did? I'd be curious in taking a look as I will end up doing a second round of porting with this cylinder.
@@MikeNBikes I've never used a degree wheel in my life. I usually raised the exhaust slightly and conversely drop the intake even less. Each motors different I try to get maximum stroke and tight squish. Also I do not trim my piston skirt, you're better off just dropping your intake instead of chopping up your piston. I also like to widen the transfers as much as I can get away with.
@@JamesPiccone So, the point of trimming the skirt is because when the piston is at TDC there is still some of the skirt in the intake. Dropping the intake wouldn't fix that. When the piston is at TDC, at the top of the intake port is where you can see the piston skirt (about 3-4mm or so) Here is a link to my Google drive of the before and after photo of this 49mm cylinder, also on the last page I included a comparison of the LD100 next to a YD100 so you can see the issue I'm talking about regarding poor matting surface on the LD100. docs.google.com/document/d/1mstq6RIclxfOHNhXZDBMvxz5apNZem8zEMSUM95FiHA/edit?usp=sharing
Thanks for sharing bro
There great cylinders bro I love mine
Should have make it Upgrading from 70cc to 80cc cilinder. 😉
Well, that's why I listed the true displacement on the 47mm and 49mm. I know it as the 49mm 72cc, but these damn kids know it as the "100cc" so sad 😢
That cylinder will rip if you port it right. I got that same Samger 49 mm and that is a iron sleeve. The whole cylinder is isn't iron though LOL only the cylinder bore bro.
I don't recall I ever said "the entire cylinder including the ports and the external casting is iron" This was more of a test, it does rip though. The port timing isn't the best, the exhaust needs to be raised more in order to have a "better blowdown" because as of right now my blowdown is pretty low.
I wanted to clean out the intake and exhaust ports. What needed the most work was the transfer ports, it was BAD. 4.5mm lip on top, approx 5mm of material removed from each side. This wasn't me widening the transfer ports, it was to match it to the transfers themselves if the casting wasn't so bad. The cylinder on one side needed to be matched to the crank case.
It was more experimental than anything. I can buy the same $23 Samger listing but from AliExpress (cheaper due to Amazon has higher seller fees) and I want to experiment with some different port maps.
@@MikeNBikes I'm really curious on the ld100 cylinder. Got to have a yd100 bottom though. Also sorry I heard you say" it's supposed to be a aluminum and it is iron".
@@JamesPiccone Ah I follow, context my guy. I meant it in regards to "the norm is aluminum, therefor, should be aluminum, right?" that's what I meant. I'm following you though.
The LD100 is a great concept, but there is one major flaw and it's the face of the exhaust port. There is zero mating surface for a gasket. If you look at the photos, there is barely any "meat" on the face of the port. I don't know too much about it and it's still a newish engine and overtime more and more information will come out from people who've purchased it. Bicycle-Engines has released a two piece YD100 as a "Zeda" product. Once again, still a new product and overtime more information from buyers will come out.
Quick question, do you have the port map to the 49mm engine you did? I'd be curious in taking a look as I will end up doing a second round of porting with this cylinder.
@@MikeNBikes I've never used a degree wheel in my life. I usually raised the exhaust slightly and conversely drop the intake even less. Each motors different I try to get maximum stroke and tight squish. Also I do not trim my piston skirt, you're better off just dropping your intake instead of chopping up your piston. I also like to widen the transfers as much as I can get away with.
@@JamesPiccone So, the point of trimming the skirt is because when the piston is at TDC there is still some of the skirt in the intake. Dropping the intake wouldn't fix that. When the piston is at TDC, at the top of the intake port is where you can see the piston skirt (about 3-4mm or so)
Here is a link to my Google drive of the before and after photo of this 49mm cylinder, also on the last page I included a comparison of the LD100 next to a YD100 so you can see the issue I'm talking about regarding poor matting surface on the LD100.
docs.google.com/document/d/1mstq6RIclxfOHNhXZDBMvxz5apNZem8zEMSUM95FiHA/edit?usp=sharing