don't send it here! sent it in and they said it would be done by the 15th or 20th of march. just got notified that they have to redo it. There goers the 2021 season championship. Thanks Millennium
I want to Nikasil plate my own cylinders bcs Millennium is really high ($200+.) my application is a home-made engine which I might have only $40 in materials + my machining time. I talked to them and for a 14mm bore, they'd still charge $120. jeepers
The nikasil is usually only a couple thousandths of an inch thick, look at the top and bottom of the cylinder to see if there's any difference in metal (you may see some discoloration from heat on a nikasil cylinder around the aluminum) but if it's steel it should be a pretty defined line where the metal changes from aluminum to steel. You can also look at the ports too. What kind of bike? If it's a motocross or modern 2 stroke/4stroke design it will most likely be nikasil. Most manufacturers only use steel sleeve on old school designs like air cooled 4 strokes.
It would be the one I own, but is cherry and never been apart, a 2002 Honda CR250. If i were to freshen it up with new rings and or piston is it automatic to have the cylinder replated? Are these cylinders capable of being bored oversized? I realize a replate would then be needed. So if it's nikasil plated there is no steel sleeve, just the aluminum casting and the plating is all there is?
It's definitely plated, and yes if its nikasil there is no steel sleeve, it's one or the other. You can overbore and replate it but how much depends on your application. These coatings are VERY durable, if you're doing just rings and pistons, just get a bore gauge and check to make sure it's within tolerance and you're good to go, they don't need to be replated every time. You also can't hone it like you would with a steel cylinder to freshen it up, at most you can use scotchbrite to clean up some rough spots but that's all I would do, honing would ruin it. The rings will seat just fine. I actually just checked the tolerance of my KTM 200 2 stroke and even with a HEAVILY worn piston, and crank and rod bearings on the way out, it was still well within factory specs, so they can definitely take a beating.
Thanks for the video, Ive got a CR125 cylinder that will be heading to Millennium Technologies soon.
Hey I'm just curious how long did it take for you to get your cylinder back?
How’d it go
don't send it here! sent it in and they said it would be done by the 15th or 20th of march. just got notified that they have to redo it. There goers the 2021 season championship. Thanks Millennium
I had this idea thinking about enhancing compression, and glad to see that it is already being done.
I'd reject that work due to those scratches above the exhaust port. Looks like someone slipped their grinder more then once.
I’m sending my KTM cylinder there as soon as my vertex piston gets in. 🤙🏽
Right on!
no left audio channel
I want to Nikasil plate my own cylinders bcs Millennium is really high ($200+.) my application is a home-made engine which I might have only $40 in materials + my machining time. I talked to them and for a 14mm bore, they'd still charge $120. jeepers
It’s sandblasted before plating.
How much would that cost? (without shipping & extras)
just sent mine for my 2004 cr250r
Is there a way to know if your cylinder uses this treatment or is a standard steel sleeve?
The nikasil is usually only a couple thousandths of an inch thick, look at the top and bottom of the cylinder to see if there's any difference in metal (you may see some discoloration from heat on a nikasil cylinder around the aluminum) but if it's steel it should be a pretty defined line where the metal changes from aluminum to steel. You can also look at the ports too. What kind of bike? If it's a motocross or modern 2 stroke/4stroke design it will most likely be nikasil. Most manufacturers only use steel sleeve on old school designs like air cooled 4 strokes.
It would be the one I own, but is cherry and never been apart, a 2002 Honda CR250. If i were to freshen it up with new rings and or piston is it automatic to have the cylinder replated? Are these cylinders capable of being bored oversized? I realize a replate would then be needed. So if it's nikasil plated there is no steel sleeve, just the aluminum casting and the plating is all there is?
It's definitely plated, and yes if its nikasil there is no steel sleeve, it's one or the other. You can overbore and replate it but how much depends on your application. These coatings are VERY durable, if you're doing just rings and pistons, just get a bore gauge and check to make sure it's within tolerance and you're good to go, they don't need to be replated every time. You also can't hone it like you would with a steel cylinder to freshen it up, at most you can use scotchbrite to clean up some rough spots but that's all I would do, honing would ruin it. The rings will seat just fine. I actually just checked the tolerance of my KTM 200 2 stroke and even with a HEAVILY worn piston, and crank and rod bearings on the way out, it was still well within factory specs, so they can definitely take a beating.
Use a magnet. If it's sleeved the magnet will stick
How much would that cost? (without shipping & extras)