The Chopper Shed

The Chopper Shed Building choppers and bobbers the old school way. Machining, welding, fabricating parts; customising and chopping any make of bike to your specifications.

The Chopper Shed helps you build your chopper...
Owned and operated by Andrew "Prof" Offe
Have your bike (or parts) designed the way you want it... battery boxes, oil tanks, frame & tank modification, brackets, seats, sissy bars, chain guards, wiring, moulding, you name it, engine, wheel and frame alignment, machining, welding. Frames accurately and safely raked. Hard tails and complete frames mad

e for your bike. We fabricate choppers, bobbers & customs. We work in either stainless or mild steel including exhaust systems. Your chopper does not need the same wheels or brakes. We regularly swap wheels and brakes to create the style and function the owner wants. Simplified wiring is basic to a real chopper... and is one of our specialties. Our wiring is designed to be accessable and reliable... for a bike that gets ridden. We don't do engine or gearbox work, but can usually put you onto someone who does...

We build complete choppers ... supply the bike and we can do the rest or... we'll chop anything no matter what brand or capacity.
.. come and work on your chopper under Prof's tutelage. Save a bit of money and learn a lot...

Quality workmanship with an emphasis on safe and strong designs and practical riding that make your bike unique. Enjoy products constructed from steel... no billet aluminium... you can buy that anywhere. Our products are made to order, made to fit, made to last... no sloppy "after market" quality

22/09/2025

A whole lot more photos of jobs coming soon, just short of time atm

Another job taking most of the day. this Sporty from interstate needed sissy bar modification, different handlebars and...
22/09/2025

Another job taking most of the day. this Sporty from interstate needed sissy bar modification, different handlebars and a spoked front wheel.
Top was facing backwards and needed to be upright so cut off and rewelded facing upwards. Note chamfers on ends to be welded so that once welded the bar will be solid steel all the way through.
I also loaned them a pad taped on with duct tape for his girlfriend to try.
I had a pair of stainless Z bars built in house which brought his hands to the right position.
We found a spoked front wheel he liked... from an early Sportster. Modern sporties have 1"axles and older ones 3/4". A sleeve was made on the early axle to fit into the right lower fork leg.
A nut was modified (unfortunately no pic) to suit the left leg size. Final job were a couple of spacers to line the rotor up with the existing caliper.
Exit one very happy couple.

Not a chopper, but maybe one day... This lad's mother called to say her sons new scooter was broken. could I fi...
17/09/2025

Not a chopper, but maybe one day...

This lad's mother called to say her sons new scooter was broken. could I fix it? Well if it was fixable I reckoned I could do it, so told them to come around with it. Half an hour later they arrived.
Those of you who know bicycles will be familiar with the method of securing the handle bars to the forks. Well this Chinese job simply had an alloy housing with a slot in it for a key (as in keyway and key like holding the HD clutch basket to the shaft. But no matching slot in the hollow shaft! So no key!
Instead they relied on the friction on the fine thread to hold it secure. My suspicion is when the Australia company got the Chinese to send an example, it had the key slots in both parts and a key. Subsequent manufacture to save money left these bits out.
Easy Peasy Man! Cut a slot in the hollow shaft. then machine up a long and tightly fitting piece of solid steel to press into the hollow shaft. Slot it and make a key and then put the thing back together. It may get some slack with time, but plenty tight enough and now very strong.
It was a cold night so they got to enjoy a nice fire in out lounge while I took a bit over an hour to do the job.
Lad was rapt with the result.
But dad was still working on the car, so it was out with the ute and ferry them home. A night with a difference and a bit of fun particularly to have a young lad back on his wheels!
Unfortunately, missed taking a few pics as I am sure there are more of these accidents out there waiting to happen.

Quite a few jobs done, just short of time to post them. Will get to it soon.
10/08/2025

Quite a few jobs done, just short of time to post them. Will get to it soon.

CB500/550 TANK FOR SALE Putting these photos up for an enquirer. CB500/550 tank. Three small dents less than a...
24/06/2025

CB500/550 TANK FOR SALE
Putting these photos up for an enquirer. CB500/550 tank. Three small dents less than an inch in diameter so easy to fix with minimal fill. Has a key lock which may make it a 1973 CB500. No key but a locksmith will make short work of it. Fuel tap has seen better days. No badges. Inside unknown, but having a locked cap and minimal outside rust would suggest it is good inside.
I have it as part of a project 500/4 frame, front end, wheels and a motor that is in ok condition. However iif someone is keen on the tank, I will let it go for $400 as I don't know when I will get to rebuild the bike.

CB550 kicker mechanisms have an internal circlip that come come adrift; as it did on Paul's CB550 chopper. I have a few...
22/06/2025

CB550 kicker mechanisms have an internal circlip that come come adrift; as it did on Paul's CB550 chopper. I have a few spare 550 engines so Boris was able to pull the sump off one of them to replace the broken circlip. Easiest way to do it is to lay the bike on it's side...

A few ongoing jobs over the last couple of weeks. Still room for more. Robert is getting his recently purchased s...
18/05/2025

A few ongoing jobs over the last couple of weeks. Still room for more.
Robert is getting his recently purchased shovel ready to the road; Brakes seized, brake lines clogged, complete new starting system including lever start. Has aftermarket frame and S&S cases, so no easy year id so registrar put it down as 1900! Pre ADR's anyway!!
Jessie has gathered enough parts to make up two CB750 choppers. After looking at all the parts we have decided on this one. Other frame is Amen plunger and springer was too long for its rake; works on this one. So far, tank mounted, fork stops welded in, rear guard shortened and mounted, sissy bar made from two HD square sissy bars to get enough height, seat pan made and upholstery cut ready for gluing.
Kick start mechanism was missing on Paul's CB550. Now has a kicker. Has been stored for five years so carbies may need a clean and this with a new battery it should fire up. He has a nice twisted square springer to go on, but will wait on that for a while.
Bobbing the kwakka 440 is progressing steadily, Seat now done and sorting out the tangle of wiring is in progress.

22/04/2025

I currently have some gaps available between jobs if anyone wants some work done.
There is also an A65BSA chopper almost finished that would make a good project for someone.
Plus an A65 frame with HD rigid rear end and and nice HD narrow glide front end and 19" and 16" HD wheels that are also in excellent condition. We had planned to put a 440 Suzuki twin into it. So another interesting project.

Ma's CB125 up for sale. Purchased new by my mother in December 1974. Has been in the family ever since. She rode ...
19/04/2025

Ma's CB125 up for sale.

Purchased new by my mother in December 1974. Has been in the family ever since. She rode it up the street daily to PO and for groceries. My three children learned to ride on it in mid nineties.

Currently has three months rego. Runs nicely. First kick start. Totally original, only replacements are the fork boots and horn and a new battery. Has the original and some subsequent rego papers and circular rego labels. Some photos also available to the buyer.
Asking $4500, which seems to be a very reasonable price for an original, one owner bike of this vintage.
And it is so much fun to ride, such a simple and slim and light machine compared to the modern bulky stuff.

Did a short job for Shaun yesterday. His springer was rattling annoyingly and he was concerned things were getting badl...
17/04/2025

Did a short job for Shaun yesterday. His springer was rattling annoyingly and he was concerned things were getting badly worn.
Unfortunately, I forgot to take the photos I should have, but as it turned out although were was some wear in the spring perches It was nothing a pile of grease couldn't fix. We could have machined them out and inserted wearlon bushes, but I didn't thing the extra expense at this time was justified. He took it for a spin and it was now quiet. We had to modify an old spanner so we cold lock the spring retaining nuts.
Did a couple of small tidy up jobs plus some welds on his XS650 forwards
Members might remember some years back before he put on the springer, we installed 3 degree steering head bearing cups which required a longer (supplied) head stem.

Some more progress on Ricks Kawasaki 440... Gear linkage measured and welded. See diagram for correct set up. ...
02/04/2025

Some more progress on Ricks Kawasaki 440...
Gear linkage measured and welded. See diagram for correct set up. I often use Harley adjustable ends in the gear linkages. they are compact, swivel and are threaded or attaching to the levers. Gear lever is cut down and drilled and tapped. Both foot peg and gear lever mountings are tapped so a locknut can be used. Both gear and the foot control lever should be the same length centre to centre and just long enough to clear the alternator housing when operated (see diagram and photo)

Both brake and gear lever are measured (see diagram), cut, drilled and shaped and welded in place. Rick sits on the bike, so we can set them up at the right angle.
Brake lever pad is measured and grooves cut in for good grip in the wet.
Tank front mounts are simple to do. Tank is set up to clear forks. A hole is drilled through the back bone and two flanged nuts are machined round and bronze welded into the backbone. They are held in place and parallel with a piece of threaded rod.
This method is used to keep tube strength rather than weakening it with just a hole. Also gives the tank tabs a flat surface to mount against.
Rear bracket will be done next, but the the little chopper is looking good.

Address

PO Box 319
Willunga, SA
5172

Telephone

+61428562554

Website

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