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Author Topic: was a rupp roadster, now i dont know what to call it  (Read 14049 times)

Offline HURCO550

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was a rupp roadster, now i dont know what to call it
« on: Jul 26, 2015, 20:42:25 »
I live in a rural sub division (I know, doesn't make much sense) but I guess that's how they do it here in Ohio. It's literally about 5 miles north of "town" surrounded by fields. Anyways between my location and going to events like mid ohio, I decided that I needed a pit bike to cruise the side streets and around events. I started looking around craigslist, but being a cheapy, nothing fit the bill.

I then remembered an old rupp mini bike frame that used to be out at dad's place. Sure enough it was still there and I snagged it today. It used to belong to a buddy of my dad's back when he was a kid, and by the looks of it, it was treated like a kid treats a mini bike. There isn't much left, pretty much just the frame and wheels, even less the front brakes. Between the overall rough shape of the bike and the relative lack of value of it in this shape (comparable specimens on eBay for less than $200) I don't feel bad about doing a bit of customization. Rupps were actually made about a half hour from here in mansfield ohio, so there are quite a few around.

The plan is some different wheels and non nobby tires, maybe a little custom suspension work, and a 6.5hp harbor freight special engine. And of course some clubman bars and a "cafe seat" lol I'm really gonna try to tick off the purists on this one =)

Here's the obligatory "barn fresh" pic


And after a quick spray off, which may have actually made it look worse haha


And here is why I'm not gonna be using these wheels

« Last Edit: Nov 17, 2016, 18:34:25 by hurco550 »
Keep er' Between The Ditches!!!

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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
"Two strokes are the motorcycle equivalent to Thors chariot. Full of glory and memories of battles victorious" ~ von yinzer

Offline HURCO550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #1 on: Jul 27, 2015, 22:29:43 »
Went to Glens surplus in Shelby and picked up some wheels. Need to make some axles up as the stock ones are 1/2" and the bearings in the new wheels are 5/8". Also stuck on some old clubman which will get narrowed up and some old shocks I had around, which lower the rear about 2"



Keep er' Between The Ditches!!!

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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
"Two strokes are the motorcycle equivalent to Thors chariot. Full of glory and memories of battles victorious" ~ von yinzer

Offline HURCO550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #2 on: Jul 29, 2015, 00:41:26 »
Got tired of the old turd falling over, so I used my mad wood working skills to make a sweet kick stand.




I had an old briggs 2 horse motor laying around that I stuck on it.




After some tinkering I realized that I don't have spark. I looked up what a coil, condenser and points would cost. It was gonna be around 30-40 bux to my door.  I then started cruising craigslist and found this running 3 horse briggs fir $40 about 10 minutes from home, so I snagged it tonight.
Keep er' Between The Ditches!!!

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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
"Two strokes are the motorcycle equivalent to Thors chariot. Full of glory and memories of battles victorious" ~ von yinzer

Offline HURCO550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #3 on: Jul 29, 2015, 13:42:57 »
BALLS. Just realized i bought a tecumseh.... on ebay she goes. Might end up with a harbor freight motor after all....
Keep er' Between The Ditches!!!

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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
"Two strokes are the motorcycle equivalent to Thors chariot. Full of glory and memories of battles victorious" ~ von yinzer

Offline HURCO550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #4 on: Aug 01, 2015, 11:31:38 »
So I picked up a harbor freight motor. With the coupons, I got er for just over a bill. 212 cc 6.5 hp. should be enough to motivate this little booger

Keep er' Between The Ditches!!!

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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
"Two strokes are the motorcycle equivalent to Thors chariot. Full of glory and memories of battles victorious" ~ von yinzer

Offline Drey6

  • Posts: 1059
Re: Rupp Roadster. I think I'm to big for this
« Reply #5 on: Aug 01, 2015, 12:05:44 »
Woot woot! Digging the wheels
1975 Honda CB550
1980 Suzuki GS550 (673cc project)
1981 Honda CM400

Offline grcamna5

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Re: Rupp Roadster. I think I'm to big for this
« Reply #6 on: Aug 02, 2015, 22:43:08 »
I like those wheels hurco;what are you going to use for brakes ?
Do your Best,no one can take that from you.

Offline HURCO550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #7 on: Aug 02, 2015, 22:48:11 »
Thanks gentlemen. Debating on brakes right now. Either drums or mechanical caliper discs. Probably gonna stay away from juice
Keep er' Between The Ditches!!!

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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
"Two strokes are the motorcycle equivalent to Thors chariot. Full of glory and memories of battles victorious" ~ von yinzer

Offline Drey6

  • Posts: 1059
Re: Rupp Roadster. I think I'm to big for this
« Reply #8 on: Aug 03, 2015, 02:19:44 »

Thanks gentlemen. Debating on brakes right now. Either drums or mechanical caliper discs. Probably gonna stay away from juice

Wise.
1975 Honda CB550
1980 Suzuki GS550 (673cc project)
1981 Honda CM400

Offline HURCO550

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Re: Rupp Roadster. I think I'm to big for this
« Reply #9 on: Aug 06, 2015, 01:11:55 »
Well.. we all know how projects go. . The frame ended up being rusted, bent, threads stripped, bearing surfaces wallowed ect. So I snagged another frame up in Shelby off the bay for $30


Got my torque converter in the mail today. It's a much cheaper copy of the popular comet tav2.


But then when mounting it up, it shows just how bad it really is out of square even my "new" frame is. That on top of clearance issues it making me somewhat re think the ol rupp frame




So, I started drawing. I am kinda diggin this. The frame would be water jet cut from .187" steel and be two identical pieces that sandwich tabbed gussets all around the outside. The wheelbase is about the same as the rupp and the wheels are 17.5" fir a bit of scale.


Keep er' Between The Ditches!!!

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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
"Two strokes are the motorcycle equivalent to Thors chariot. Full of glory and memories of battles victorious" ~ von yinzer