Casted parts available now

**mrgrn** · #1 (**permalink**) 11-03-2009, 08:41 PM

I found a great place to have cast parts made and am able to have parts done so feel free to let me know if you might have some ideas

can be many materials casted as well

I am starting with HRC RC30 deep sumps as they are tought to find and i want a replacement for mine as a example

**CrimsonCloak** · #2 (**permalink**) 11-03-2009, 09:49 PM

Can you cast a magnesium swingarm for less than $2,500?

Might also be an affordable way to make some mag brackets or mounts for various items.

**mrgrn** · #3 (**permalink**) 11-03-2009, 11:59 PM

Quote:

Originally Posted by CrimsonCloak

Can you cast a magnesium swingarm for less than $2,500?

Might also be an affordable way to make some mag brackets or mounts for various items.

this guy does anything. he has brass, mag, alum, etc. i was like wow, my new buddy LOL

he is looking for some projects and i am going to be the bike connect for him.

i would need a donor one, do you have?

i know the mag is a wee bit lighter but it also is larger right?

can't cast aluminum be used possibly?

send me a picture and let me kow if there is at least like 4-6 people who want these as i could have that done on like two weeks

Regards Mark

**CrimsonCloak** · #4 (**permalink**) 11-04-2009, 01:43 AM

I don't have a donor oversize mag swingarm...sadly.

orca122 · #5 (**permalink**) 11-05-2009, 06:34 PM

The magnesium swingarms were slightly longer essentially for better handling of the shock, but the big advantage in my eyes is the weight savings. The stock swing arm is silly heavy. I would be interested in a magnesium replica of the stock swingarm. I believe the stock aluminum swingarms are cast as two pieces and welded together. I have never had a magnesium swingarm in my hands to discern how it is made. Keep us posted on how your deep sump cases workout. Best Wishes Brad.

**CrimsonCloak** · #6 (**permalink**) 11-05-2009, 09:59 PM

I'm sure there is something about that swingarm that makes it so damn expensive to make, otherwise someone else surely would be doing it. Obviously the demand is there, I mean there are people paying 2500~3500 bucks for used ones.

But damn I wonder if it's just because they are rare. Worth taking a look at anyway.

I know I'd give 1,500~2,000 for one if it was nice. And that's used. Sell a new one for 1,500 and you'd have something.

Maybe Durrani can help, I hear he isn't too busy.

**mrgrn** · #7 (**permalink**) 11-05-2009, 10:09 PM

Quote:

Originally Posted by CrimsonCloak

I'm sure there is something about that swingarm that makes it so damn expensive to make, otherwise someone else surely would be doing it. Obviously the demand is there, I mean there are people paying 2500~3500 bucks for used ones.

But damn I wonder if it's just because they are rare. Worth taking a look at anyway.

I know I'd give 1,500~2,000 for one if it was nice. And that's used. Sell a new one for 1,500 and you'd have something.

Maybe Durrani can help, I hear he isn't too busy.

i would need a print, a scanned CAD or the unit to hold here for a week to start. the mag might be tough as it is a bit expensive and i am wondering a small compramise can be done in say all cast alum? the minimal weight gain would offset a huge price drop and better availability

i am eager to get some pics at least so my guy can look at it. i want to contribute some more as well as get some time working with foundry stuff as that really looks like a awesome hobby and his shop blew me away the stuff he had

**mrgrn** · #8 (**permalink**) 11-05-2009, 10:11 PM

Quote:

Originally Posted by orca122

The magnesium swingarms were slightly longer essentially for better handling of the shock, but the big advantage in my eyes is the weight savings. The stock swing arm is silly heavy. I would be interested in a magnesium replica of the stock swingarm. I believe the stock aluminum swingarms are cast as two pieces and welded together. I have never had a magnesium swingarm in my hands to discern how it is made. Keep us posted on how your deep sump cases workout. Best Wishes Brad.

do you have a stock one to use?

i can have the tooling done to even make the OEM longer then so we skin the cat twice possibly

i am wanting to have my RC30 swinger done out of billet here this winter for a wider cutout and a wee bit longer too but if this guy can sand cast this stuff and make alterations easily for half the dough of the billet it might be worth a shot

OH, doing the RC30 valve covers too but prolly in alum

**CrimsonCloak** · #9 (**permalink**) 11-06-2009, 12:32 AM

I've seen stock ones going for $50-60 bucks with a scrape or two....if you need one gotham, metroduc, wounded duc, pretty much anyone who breaks ducs should have one.

**mrgrn** · #10 (**permalink**) 11-06-2009, 12:38 AM

Quote:

Originally Posted by CrimsonCloak

I've seen stock ones going for $50-60 bucks with a scrape or two....if you need one gotham, metroduc, wounded duc, pretty much anyone who breaks ducs should have one.

i see that for sure

i have asked my guy about the materials and am waiting too hear back

think we can rustle up 6 people for longer cast jobbies?

**CrimsonCloak** · #11 (**permalink**) 11-06-2009, 02:13 AM

I know it's a lot of qualifications, but if it is:

as strong as stock
rigid as stock
10mm longer
weighs equal or less than stock
Cost significantly less than the mags that are available

... I want one.

Get a price on that bad boy.

orca122 · #12 (**permalink**) 11-09-2009, 09:22 PM

+1 for above. I believe the current pricing of mag swingarms is based on availability as few were made. Carl Foggarty actually tried a double sided swingarm for weight savings and control of torsional rigidity but it didnt pan out.
Stock swingarms are easily available. I dont have an extra but could source one as listed. The cost of the new swingarm would be the limiting issue for me. Of course it would have to stand up to its intended use. A pretty and light but nonfuctional part is not gonna work here. I would be willing to track test a unit. Consinder the price of used 848 swingarm as a good price point comparason.
This may seem intuitive, but if some non bike oriented is woking on extending a stock swingarm on cad software, remember to stretch it outside the rim/tire diameter. The use of stock suspension connectors and bearings would be excellent as well.
Please do try to get a price estimate. Brad

rjjablo · #13 (**permalink**) 11-09-2009, 11:29 PM

I would advocate the price of the swingarm needs to include the cost of machining it to make it usable.

Only one on this board I have seen with those skills is Larry.

Machining magnesium presents its one major challenge and that is flammability. Get it wrong and your shop is in flames.

RC51Stunna · #14 (**permalink**) 11-11-2009, 06:56 PM

Quote:

Originally Posted by rjjablo

I would advocate the price of the swingarm needs to include the cost of machining it to make it usable.

Only one on this board I have seen with those skills is Larry.

Machining magnesium presents its one major challenge and that is flammability. Get it wrong and your shop is in flames.

Mg on fire is intense!

Stunna

wibbly · #15 (**permalink**) 11-11-2009, 08:17 PM

Quote:

Originally Posted by RC51Stunna

Mg on fire is intense!

Stunna

especially when you try to put it out with water

**mrgrn** · #16 (**permalink**) 11-11-2009, 08:43 PM

Quote:

Originally Posted by rjjablo

I would advocate the price of the swingarm needs to include the cost of machining it to make it usable.

Only one on this board I have seen with those skills is Larry.

Machining magnesium presents its one major challenge and that is flammability. Get it wrong and your shop is in flames.

OK, so just because you only know larry means out of damn near 300 millions people in the USA i could not have found somebody who can cast metals properly, you have to be kidding right?

also, FWIW the mag swingarms are not 100% mag they are a alloy

I guess this means you will not be buying a cast swingarm then right

rjjablo · #17 (**permalink**) 11-12-2009, 12:40 AM

Quote:

Originally Posted by mrgrn

can cast metals properly, you have to be kidding right?

also, FWIW the mag swingarms are not 100% mag they are a alloy

I guess this means you will not be buying a cast swingarm then right

Actualy I dont think Larry Can Cast anything except a V-4.

But once the raw casting is completed the front bearings need to be machined, the rear eccentric, and several other bolt holes need to be drilled and tapped. All to some degree of accuracy off of a casting.

I would assume you would have to sacrifice one to establish where these things are. Either from an original or thru trial an error.

Lots of competent people out there can do it (other than Larry), they all charge though.

I would love a Magnesium Swingarm, don't have the money right now though.

**mrgrn** · #18 (**permalink**) 11-12-2009, 12:49 AM

Quote:

Originally Posted by rjjablo

Actualy I dont think Larry Can Cast anything except a V-4.

But once the raw casting is completed the front bearings need to be machined, the rear eccentric, and several other bolt holes need to be drilled and tapped. All to some degree of accuracy off of a casting.

I would assume you would have to sacrifice one to establish where these things are. Either from an original or thru trial an error.

Lots of competent people out there can do it (other than Larry), they all charge though.

I would love a Magnesium Swingarm, don't have the money right now though.

i have a machinest next door who does all this this guys castings. they were machining 10,000$ somehting or anothers today when i was there. this guy has been casting metals for 30 years i am sure a swingarm is not that difficult

i will have to get a final price and i would mostly need cusotmers lined up as i am not going to fot the bill for $1800 swingarms i can't even use without at leats 6 people with money ready

asaurkraut · #19 (**permalink**) 11-12-2009, 04:14 PM

Marc,
Can you get other parts cast as well? I could be interested in some side case covers. I have a spare set that could be used for set-up. How many sets would you need to make it happen?

Thanks,
Dan

**mrgrn** · #20 (**permalink**) 11-12-2009, 08:54 PM

Quote:

Originally Posted by asaurkraut

Marc,
Can you get other parts cast as well? I could be interested in some side case covers. I have a spare set that could be used for set-up. How many sets would you need to make it happen?

Thanks,
Dan

case covers would be ace

do they need to be stronger too?

Send me them Dan and i will gladly take them over for a look and price for you and i appreciate the heads up attitude