Easier than you think, no special tools required
http://www.suzukituning.com/PSA/Suspension/Lowering.htm http://www.saxperience.com/forum/showthread.php?p=927702 Good luck matey
as the rear is torsion it is not straight forward. the torsion bars have to be removed one side at a time, with the torsion bar out simply adjust hub the required amount and replace torsion bar. then do the other side. this can be hard as the bars can be difficult to remove. best left to professional should cost between £60-£100
go to this website www.planetisuzoo.com and slowly scroll down to Isuzu Torsion bar adjustment that is where you should find your answer to this question.
To adjust the torsion bar on a Peugeot 106, first, lift the vehicle and secure it on jack stands. Then, remove the rear axle mounting bolts and lower the axle slightly to access the torsion bar adjustment. Use a torsion bar adjustment tool or a proper wrench to turn the adjuster bolt, which will either raise or lower the rear suspension. Finally, reassemble all components, double-check the alignment, and ensure the vehicle is at the desired ride height.
The Torsion bar is a suspension component. It essentially "twists" ever so slightly to adjust ride height. This is adjusted by a special tool specific to the manufacturer.
Sorry to answer a question with a question but would it be similar to Peugeot 206 or any other car that uses torsion bars? I thought At least it is somewhere to start looking, if you find out how others adjust then maybe you can work out how your was put together and adjusted, I know that Peugeot use a special tool to set it up the torsion bar as it's a very fiddly job. Also have a quick look at this web site as it's explained a bit what's involved http://www.pugspares.co.uk/FAQSuspension.asp hope this helps in any away steve
To raise the torsion bar ride height on a Peugeot 106, you'll need to adjust the torsion bars themselves. Start by safely lifting the rear of the vehicle and removing the rear wheels. Then, access the torsion bar adjustment bolts located on the trailing arms and use a suitable tool to rotate the adjusters. Typically, turning the adjuster clockwise will raise the ride height, so make small adjustments and check the height frequently until you achieve the desired level.
You need a torsion key.. most mechanics can twist the bar for cheap
dont buy a peugeot
There is a bolt near rear of torsion bar (the end closer to rear bumper) which will increase or decrease the tension on torsion bar when you adjust bolt.
torsion bars only exist on 4WD dakotas....2WD have coils
Best to call a professional (no joke)