Help with exercise bike

[Mojooo]

I bought a cheap exercise bike off eBay - it is very similar to this

http://cgi.ebay.co.uk/Reebok-RB1000J-Exercise-Bike...

I want to reduce the resistance to the absolute minimum.

Only problem is that on mine the 'load up' and 'load down' buttons don't seem to do anything and I am unsure if the bike even has different levels of resistants (but it must do right?)

The question is, is there a way of opening it up and manually adjusting it? There are no physical knobs on the machine to adjust.

I believe it is magnetic resistance, but I cannot find a manual online anywhere.

[Dan_The_Man]

I think you can place chocks under the rear of the bike to give the impression of cycling downhill, may make life easier.