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Author Topic: was a rupp roadster, now i dont know what to call it  (Read 21302 times)

Offline Brodie

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Re: Rupp Roadster. I think I'm to big for this
« Reply #10 on: Aug 06, 2015, 02:44:15 »
Dude, I'm in. Looks like an awesome project.
I'm not sure, but don't ask Brodie.

Way to many build and half done projects to list here.
Sr250, Gs750, Z50A, XV1100, A10, Z160A.

Offline 1fasgsxr

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Re: Rupp Roadster. I think I'm to big for this
« Reply #11 on: Aug 06, 2015, 12:51:45 »
Looking good man...If I am not mistaken if thats a "predator" engine they make a ton of hop up goodies for it... I was looking into one for my drift trike I never finished...lol
http://www.dotheton.com/forum/index.php?topic=41083.0

Life is a journey from the maternity ward to the crematorium....

Offline Hurco550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #12 on: Aug 06, 2015, 13:24:40 »
Thanks gentlemen! The 212 is a pretty much direct copy or clone of a Honda. China jumped on it when Hondas patents ran out I guess. There is a huge aftermarket for them, billet con rod, billet fly wheel, billet piston, slide carb ect. My goal though is to leave it stock (at this point) to keep it as "dependable" as a Chinese engine can be. I think even stock, it will motivate this little booger along fast enough to be stupid for what it is lol I too had the "start" to a drift trike at one point. I gave up on that before I even started doing any fab work though lol
« Last Edit: Aug 06, 2015, 13:26:26 by hurco550 »
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline 1fasgsxr

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Re: Rupp Roadster. I think I'm to big for this
« Reply #13 on: Aug 06, 2015, 13:36:36 »
all i really need to finish my trike is tires and the pvc pieces to go over them and assemble the front wheel...just lost interest..lol
http://www.dotheton.com/forum/index.php?topic=41083.0

Life is a journey from the maternity ward to the crematorium....

Offline MotorbikeBruno

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Re: Rupp Roadster. I think I'm to big for this
« Reply #14 on: Aug 06, 2015, 17:28:38 »
Signing on....I've got a son, and a second kid on the way.  I think law dictates that I must build at least ONE for them, and several for me correct?  This looks awesome.  Great work so far!

Offline Hurco550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #15 on: Aug 06, 2015, 22:27:29 »
Bruno, I'm pretty sure that it is a requirement =) if this thing actually gets completed, I'll send the flat cut files to ya. If you found a waterjet or laser shop, you would be a weld shop, a harbor freight engine and some wheels (more or less) away from a neat little ride haha.

I got the design finished up. I'm gonna have my water jet guy (dad) cut my first attempt out of 3/16" thick ply wood and just arc weld it together with wet dowel rods. Then I will make changes as necessary before committing to steel lol

I drew up the wheels to get a bit better idea of the finished look, and I think I can dig it. I am already guessing that this thing will be painful to ride, but it will look cool and that's all that matters in any bike (or at least that's what I heard from xb33bsa) lol

Wheels n parts drawn up


All the "slots" between the speed holes are where my gussets will go. The way I have stuff tabbed, this thing should be largely self fixturing


Here are what the gussets will look like that will space the frame halves apart


And here is what it should look like more or less one welded and ground


I left room for the stock gas tank, airbox and muffler, but eventually I will hopefully make all those things and get rid of the plastic stuff
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline Brodie

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Re: Rupp Roadster. I think I'm to big for this
« Reply #16 on: Aug 06, 2015, 22:37:15 »
Yep, have to build one if you have a kid. Tis law. If they are anything like me they will still have it at 24.

Good looking frame design. Are you going to stick a rear shock in there or just run hard tail?

Also, beware big engines in small bikes. Nothing to get the heart pumping like hitting a pot hole at 70mph with 8 inch tyres.

Sent from my ASUS_Z00AD using Tapatalk

I'm not sure, but don't ask Brodie.

Way to many build and half done projects to list here.
Sr250, Gs750, Z50A, XV1100, A10, Z160A.

Offline Hurco550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #17 on: Aug 06, 2015, 23:02:34 »
Ha, no plans for a suspension at this point, just the jelly between the vertibrae in my back =)

I am hoping that my math is right and I end up with a max speed of around 40 mph with a 72 tooth rear sprocket. That will be plenty fast for this booger
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline MotorbikeBruno

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Re: Rupp Roadster. I think I'm to big for this
« Reply #18 on: Aug 07, 2015, 11:53:39 »
Bruno, I'm pretty sure that it is a requirement =) if this thing actually gets completed, I'll send the flat cut files to ya. If you found a waterjet or laser shop, you would be a weld shop, a harbor freight engine and some wheels (more or less) away from a neat little ride haha.

Awesome.  Maybe I'd even throw ya some paypal money for your efforts :)     My dad knows a waterjet guy, I can weld fairly well now and there's a harbor freight 10 miles from me!  Sounds like this will have to happen.  Now I may have to sell a bike to fund the project...the second rule is one bike out = one bike in without any naysaying from the wife.  (she rides so this rule works quite well)

I'm planning on a fleet for the kids though...so maybe the rule will change to 1 large bike out, 3 mini bikes in?  We'll see  ;)

I may modify mine with cheap chinese scooter suspension though...I feel old at 30 already...

Keep at it!

Offline Hurco550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #19 on: Aug 13, 2015, 23:30:48 »
My dad got the wood mock up cut


I started assembling the pieces and gluing them together










Gotta love my "custom" brick wood clamps


Kinda assembled






I am glad I did it in wood, as I have a few changes to make, but they are minute. I an going to go a bit different on the rear end to make it a bit less bulky looking. All in all, I'm pretty happy with it
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet