Schwinn OCC Chopper not a fun build.

[Motoschwinn]

Hey guys,

Today I went down to Mobilgal's (a member here) to start on her OCC chopper. She got a 80cc motor kit, really nice for the most part. Will it last as long as my old Kings? Who knows... The muffler is very cheap, and the sprocket was just silver and not chrome. Looks like the motor is sprayed silver, and then has a clearcoat. Pretty sure she got it from Powerking

Anyway, it seems every aspect of building this bike is a hassle. She bought a adapter for the motor, which we had problem getting the holes drilled. The only bit that we needed was dull. Finally after 4 hours of travel time and jacking around we got the sprocket mounted and the adapter in place.

I see extra work on mounting the fuel tank, rear brake assembly is in the way of the chain, and the chain needs a extra 12 links (anybody got some?). Tensioner will most likely need to be fashioned to fit it better. Bending the exhaust... Trimming the fender, I'm sure I'm missing something else. ANYONE that has built this bike, let me know. Oh it has a 20" rear tire and a 44 tooth sprocket, so what knid of performance can she expect?

 

[Dave31]

If I am not mistaken I believe their is a thread about the occ chopper, if I remember right their was a lot of Mod that has to be done.

I will do my best to find it but no promises.

 

[Motoschwinn]

Amen to that brother. Other than mounting the throttle, everything else has some type of problem. Damn I wish she got a Point Beach, we would have been riding today! But on the other hand, I'll learn more about custom builds...

 

[Dave31]

Sorry I had no luck finding it....hopefully someone with experience with that bike will jump in.

 

[azbill]

I have some experience with occ's
my son-in-law (azvinnie) has built 4 or 5 so far
the sprocket and engine both need an adapter (the engine definitely and the sprocket is a lot easier with the adapter)
to clear the rear brake, the tensioner needs to be mounted upside down, pushing chain below brakes
there are 2 different engine mounts available (livefast motors, and a guy called barry something on e-bay), we had probs with livefast's mount and have used barry's on every build (I even used barry's (with another plate I bent) on a deviate chopper I built last year
I hope that wasn't too long-winded, and will try to answer any other ???'s you have

 

[Motoschwinn]

Yeah she got the one from Barry. Best way to mount the fuel tank?

 

[azbill]

the easiest way seems to be to use 'L' brackets
bolt them to the tank bolts and use self tapping screws to mount to frame
I have used the original mounts turned upside down and screwed to the frame as well, but they always beak around the middle screw to the frame
hope that helped

 

[MyPC8MyBrain]

Yeah, I'm in the middle of an OCC Chopper build right now too.. Livefast sprocket adapter worked fairly easy. Barrys motor mount went on fine. Installed the tank with the supplied brackets upside down. Attached them to the frame with threaded 1/4 20 nutserts.

Exhaust is what has me worried. I'm going to hate spending the $$ for a custom chopper pipe.

Started this one from a bare frame..

 

[mobilgal]

Yes everyone Motoschwinn and I have started on my Chopper! Ok...So he's doing most of the work, but he has the experience. Actually he was like a kid in a candy store! Unfortunatley the drill I have was too tall and the cheap drill bits just couldn't cut it. (Literally) So off we went to his parents house where his dad has every tool you could ever need and a huge comfy garage to work in. (Sure beats working in the drizzling rain.) Once there with his dad and him working around the bike, I decided I better stay out of the way. A girl can get hurt getting between two guys and a project!
Anyway, I think Motoschwinn enjoyed working on it, at least until we hit that little snag. We're both of the "measure twice and cut once" school of thought and want to get it right. He was probably more bumbed than I was not to get further on it. I don't mind and set my mind on enjoying the journey. I can wear a parka for my break in rides if need be.

I appreciate the tip on using L Brackets. We were going to have my brother spot weld the tank to the bike, but he's never welded anything and inherited the welder. I'm a little worried he may burn a hole through something. He does stained glass work, so he has a lot of experience soldering and a pretty steady hand. It may be an option later after a few pactice bits. Anyone have issues with the clearance for the spark plug cover? everything fits kind of snug on this bike. I need to put brakes on the front and need taller handle bars. Problem is getting them here fast enough. Anyone in KC area have Ape Hangers that will fit a dual stem OCC Stingray? I tried Acme bikes and they didn't have anything that would fit. Oh I forgot to mention. Several people I work with are interested in building bikes. One guy is done and has been riding his to work everyday for a week now. He bought a Schwinn Point Beach and it went together like a charm.

 

[jasonh]

I'd like to build a chopper one of these days.

Too bad the only ones readily available are the little kids ones

Good to know it's gonna take a bit of work.

Good luck with the rest of the build. Pics please

Oh and for the exhaust, you can use conduit instead of buying the custom one. Use a conduit bender and weld that sucker up and you're good to go

 

[ricknnan]

i put acouple of these together my self with little trouble the mount from bike berry you dont use the chain tensioner..and after you add the extra links to your chain .the chain will run between the brake arm and the frame dont use the tensioner..and the L brackets are the easiest way to go.and the muffler you can just bend it alittle bit with heat or cut the pipe at the bend and go to home depot and get a piece of conduit and make your own custom pipe

 

[comfortableshoes]

I built one of these and love it to death... Click my username and you should be able to find my build thread.

Barry's Mount is instrumental in getting the build together with ease.

I have a 48t sprocket and the bike hauls my fat a$$ around pretty well, 25mph around mid throttle and 35mph easily.

I drilled my hub to get the sprocket on there. I didn't use an adaptor. You can see some pics of that on my flickr account- follow the link in my sig.

For the gas tank. I flipped the mounts upside down, used 2 small screws on either side trimmed the long mounts down and double nutter it on. Works great no issues.

Once you get it together it runs like heck, hauls a$$ and looks great. You will get some heads turned. And make sure you are legal in your area, you will get pulled over so the po po can ask you questions about it. The cops in my town love it.

 

[Creative Engineering]

comfortableshoes,

Interesting!

Mathmatically a smaller diameter rear wheel would also require a smaller diameter rear sprocket in order to maintain the same top speed as a bike with a larger diameter wheel. The two numbers are directly proportional.

The point beach schwinn I assembled had a rear tire that measured 26.15" using precision calipers...we used the 44T sprocket that came with the kit. I clocked a 160lb. rider going 34 Mph flat out.

You have increased the sprocket size to 48T and this is a 20" tire? Mathmatically you should be able to pull nice wheelies...i.e. great acceleration...but top speed?

Either the wide Occ tire is also much larger than 20" in diameter or you are getting a lot of RPM out of your motor.

Jim

 

[comfortableshoes]

comfortableshoes,

Interesting!

Mathmatically a smaller diameter rear wheel would also require a smaller diameter rear sprocket in order to maintain the same top speed as a bike with a larger diameter wheel. The two numbers are directly proportional.

The point beach schwinn I assembled had a rear tire that measured 26.15" using precision calipers...we used the 44T sprocket that came with the kit. I clocked a 160lb. rider going 34 Mph flat out.

You have increased the sprocket size to 48T and this is a 20" tire? Mathmatically you should be able to pull nice wheelies...i.e. great acceleration...but top speed?

Either the wide Occ tire is also much larger than 20" in diameter or you are getting a lot of RPM out of your motor.

Jim

I have not measure the outer diameter of the tire- wheel and tire BUT I believe that the RIM is 20 inches. I'll get a quick measurement of them together. I have yet to pull a wheelie, I don't think it can with my fat butt on there. .lol I can tell you that I only have to pedal a few strokes before I let off on the clutch and it does set me back on the seat. Acceleration is fast.

It's been too darn cold for me to ride, so I could be off on my recollection in terms of exact numbers.

What I can remember is how much fun it is to ride! I can't wait until spring.

 

[Creative Engineering]

comfortableshoes,

You may have also been able to enter into a higher RPM band with the tall gear.

This interests me the most, because 6,000 R.P.M. is the low end for a small 2 cycle engine. It really should Rev to 8,000...and with your combo it just may have!

Let me know what you find out when the weather clears.

Jim

 

[Creative Engineering]

Oh yeah I forgot to mention,

I think with bikes the diameter is to the outside of the tire...as opposed to rim size like on cars. Others with far more knowledge about bikes please chime in!

The bike I'm working on now has a rear tire that is advertised as 24", but it is wide and actually measures nearly 25" in Diameter. I know the Occ tire is really wide also!

Jim

 

[BrettMavriK]

I'm building a chopper that is stretched for adults, using two bikes.
An OCC Stingray and a Jesse James West Coast Chopper. The fusion has made a bike with a 53" wheel base a 36" neck height, 48" grip height, all with a 30" seat height. With pedal extended forward, my knee is slightly bent.
I am using The Stingray rear wheel which negated the OCC's rear wheel cage. I am using a homebuilt jackshaft and a 5 speed rear freewheel with a derailer. The problem lies in the center pull rear brake getting in the way of everything. I had a bright idea to use disc brakes, so I got with Jim here (Creative Engineering) and some adapters are being made to fit disc brake rotors to the stock Stingray wheels. I also though it would be very important to have as much braking power as engine power, and disc brakes are the answer as well. These adaptors won't work with the single driven kit gear, however. Something could always be fabricated to be made to work.
That's part of the journey of this wonderful hobby. Take your time, think it out, and it'll all come together.

'BrettMavriK

I'd like to build a chopper one of these days.

Too bad the only ones readily available are the little kids ones

Good to know it's gonna take a bit of work.

Good luck with the rest of the build. Pics please

Oh and for the exhaust, you can use conduit instead of buying the custom one. Use a conduit bender and weld that sucker up and you're good to go

 

[misteright1_99]

Or there is always Zone8cycling.com they offer several adult larger "choppers".....

Micargi Prado Deluxe Chopper Bike

 

[Hot Dog Piggy Tails]

I dont know if this response will be really late but if our brothe does braze welding (its acetylene and oxygen with flux insulated brass stick) he could grind through the plating on the frame then braze on your L brackets for the tank.. I wa stold some of these are solid chrome though. Real tough to drill and hard to arc weld (braze wont work)

 

[Hot Dog Piggy Tails]

Mr Right it looks like them wheels on that Micargi are radial or 2 cross laced which is'nt an option for motoring. the basket nsure id low on them. might have to fabricate a higher basket,build the mounts higher. I could build a nice set of steel wheels for these. Thats what Im doing currently for a friend using 2.125 in rear and 22 x 1.75 in front ,all 12 ga spokes. The front hub is a Sturmey archer XFDD . Its a 70mm Drum brake with a built in 3 watt generator. He wants radial lacing on the front but were using 12 ga s he'll be stopping ok. the area radially around the hub is so much greater it'll be easy drilling the second set of 36 spoke holes. The only hard part was finding the front wheel (Cromed) in 72 hole 12 ga. It did'nt happen so Ill be doubling them too.