Restoration Procedures

 

 

 

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Best quality restoration process for antique Chinese Army motorbike, yet within an affordable budget.

We pay top dollars to acquire real 1960's,1970's and later used or New Old Stock Chang Jiang motorcycles with sidecars from the Chinese Army (PLA) nation wide in China through our sourcing net work. We hand pick the ones with original low mileages at the speedometer from the Chinese Army's surplus warehouses. I will show you (not just say) that we are the best in vintage PLA bike stock and restoration. It is are getting harder to find those old style PLA army bikes: please secure yours today, first come first service.

Old and NOS (New Old Stock) Chinese Army Bikes


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35 km PLA bike speedometer read.


NOS (New Old Stock) CJ750 Parts Right From PLA's Navy Base

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PLA Navy Base. CJ750 go to water also?


NOS Parts Show Case: Not for Sale (for client's restoration bikes only!)

Carb's copper floats: 1967.

Copper clutch bearings: 1968.

Clutch parts: 1968 by 7427 military factory.

6V generator: 1972.

Carbs: 1972.

Air valve: 1972.

Front fork parts: 1968, # 45 stell.

Piston rings: 1972.

Pistons: 1972, it's weight 20g more than new ones.


Those Chang Jiang 750 motorcycles were made for Chinese Army with top grade quality for battle, supposed for the war with the USSR in the 1960s. Tension was very high at that time between China and the USSR, because the USSR wanted to expand in the 1960s in east and west fronts. That is one of the funniest things if you consider where the manufacturing tools for Chang Jiang 750 motorcycle originally came from in the first place. Those Chang Jiang motorcycles were manufactured side by side in the same factory with military CJ 6 fight plans, heavy 105 mm artillery and 56, 57, 62 model battle tanks in the heartland of JianXi providence in China. Remember that there was no country in the world with long range cruise missiles at that time, so production of the Chang Jiang motorcycle could continue during the war even in the case of fighting between China and the USSR on the northern front. They are sturdy and work very well for modern age restorations even after so many years. Of course, the original 1960's wreck staged CJ 750 is not safe to ride if the owner does not restore it right with new or "new old stock" high quality parts like we do.

Feedback is welcome by us if you follow our restore procedures and feel free to do so. Any restoration procedure exchange is also very welcome by us. Custom restoration of a vintage motorcycle usually takes 25 days to 35 days for us, waiting time may needed if we are at full steam.

 The following are VintageSidecar.com's Show Quality Bike Scratch Restoration Procedures:


Part One: Disassemble the whole motorcycle to about 2600 individual parts. Replace the wear out parts with "new older stock" Chinese Army surplus parts.


Part Two: Grind, coat, pre and final paint the body parts, frames, forks and sidecar

                Slide show 1: Grind, sand and paste fenders and sidecar.

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Grind bike's main frame.

                Slide show 2: Base paint and patches

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2 base painted gas tank.

                Slide show 3: Final painted gas tank, fenders and sidecar

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Flame painted yellow gas tank.

 

                Slide show 4: Assembling engine and forks

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Painted bike's main frame.

1. For Frames
• Grind frames smoothly by machine and hands;
• Apply undercoat by hand;
• Sand it by hands for hours or days until it totally smooth;
• Apply undercoat again as where it needed;
• Repeat the above steps until the frame's surface is almost perfectly smooth for the first lay of paint.

2. For inside sidecar

• Grind down to the bare metal by machine and hands, making sure every joint is very clear and the sidecar wall is very straight. Make sure the connection between all panels are flushed.

3. Outside sidecar
• Sanding the outside of the sidecar by machine and hand to the bare metal then coating takes as much as 5 days;
• Fill in any areas needed and pay special detail attention around the handles of the sidecar. Make sure they reach pure smoothness inside and out;
• Original military weld lines for machines guns and other attachments on the sidecar are filled and flushed. Every corners are paid close attention;
• Make sure the sidecar is ready for the undercoat process, then undercoat it.

4. Tank and fenders
• Grind to the bare metal at tank and fenders. Make sure the fenders are in a perfect shape;
• Treat the dents and fill the holes as needed. Make sure the surfaces of tank and fenders are very smooth;
• Apply the undercoats on tank and fenders, then sand it again;
• Applied the undercoat a second time and patch the undercoat as needed;
• Continue sanding them until the smooth surface is ready for painting.

5. Final paint: tank, fenders and sidecar plus other parts need to paint
• We outsourced this kind fine painting job to the best painting factory in town. They use BASF, Dupont and other top brand paint for lacquer paint. We pay top dollars for the top professional paint shop with the best equipment;
• Applied strips line, color paint and brush paint as specially requested by our client;
• Condition the paint surface by touching it with lamb's wool very carefully.

6. Flame paint
Outsourcing the flame or brush paint to our contracted paint artist. When a paint job has great detail and beauty, the final job will be a one of a kind art work. Your desired patterns or pictures are welcome.


Part Three: Polishing engine and plating parts


• Chrome job was outsourced to the best plating factory in Beijing China;
• Entire engine and gear box was polished (Option);
• Custom made high quality chrome rims.
 


                Slide show 5: Finished bike

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Finished yellow flame bike with sidecar.

 

Part Four: Assembly the bike

After painting, plating and polished parts are gathering together and we start assembling the bike. We use the stainless bolts and nuts whenever possible for assembly.
• We change all the gaskets and sealers  to top quality new or NOS ones;
• Check and replace the bearings with top quality German and Japanese made bearings for internal engine and all the wheels;
• New plating custom pipes (meet European's stand II) for great looking, environmentally friendly and true motorcycle sound;
• Upgrade to a brand new gear box with reverse gear for every show quality bike with sidecar.   

Main Frame Arrived From Paint Shop. It will last for many years.

Starting the Assemblling: top quality electric wires, cable and pistons, etc...

Almost Finish: the paper wrap still on.

German Grey Metal Boxes: for crews of 3 at BMW R71.

Painted German Grey Sidecar

80% done German Grey BMW R71


Part Five: Quality control in shop and on the road for test

We will ride the newly assembly bike for 50 to 100 miles for the real road performance test. Most time it is problem free. If there is a problem, we will rework it until we fix it.


Part Six: VintageSidecar.com's options and custom parts

For most biker's, the original Chinese Army configuration will be enough for local and high way performance. If you have some special needs, the following options will suit your situation:

- Stainless rims and spokes;
- High handle bars for easy rider feeling or you are a tall person;
- 3 different kinds custom exhaust pipes;
- Larger oil sump if the road bumper is not a concert and you do not want change your oil often;
- Stronger oil pump;
- Fold-down sidecar windscreen for sidecar passenger if you have young kids or an old wife;
- Non rusting wheels (powder coated paint rims);
- Faster final drive to ride it little faster;
- Chromed or painted brake hubs according the bike's style, however paint is better;
- Custom made leather seat cover, leather sidecar seats;
- Leather canvas sidecar covers only for sunning days but not for 4 season driver;
- Custom carpets for the sidecar.

- Or any thing else you can think about it.

All 12 V bikes are upgraded to dual 12V electric starter with kick starter.

What custom build motorcycle means to us: tell us what you want and we will build it for you for a reasonable price.

Please email or call us with questions or arrange a test drive on our demo motorcycles in the great Boston area and it is highly recommended by us (motorcycle driver's license required for test drive).

Info, Quote & Order Email to Mr. Lee: Lee@VintageSidecar.com


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