ZG1300 Power Restriction

Hi. l ask elsewhere but no answer yet, the German market 1986 ZG1300 DFI (INJECTED) has a restriction too limit HP for that market, l have the opportunity to buy one in Australia but the power restriction is really painfully slow, anyone know how the restriction was done and can it be removed?  Many thanks.

Maybe Holger could help out here with camshaft specs for the ZG1300 please. We have no access to a ZG1300 service manual.

There's quite a difference between the camshaft specs for the KZ1300 and the ZN1300 Voyager. The KZ1300 cams are more aggressive while the ZN1300 cams are more torquey .
KZ1300 cams - 270 duration intake  280 duration exhaust 
The intake closes 25 degrees later on the KZ than the ZN giving the KZ more time to fill the cylinder with a fresh charge.
The exhaust opens  15 degrees earlier than the ZN giving the KZ more time to exhaust the spent fuel so less torque but allows for faster higher reving.

ZN1300 cams - 260 duration intake and 260 duration exhaust. Much more milder cams that don't fill the cylinders as well but allow the power stroke more time to develop power

The service limit height of the cam lobes is the same within .2mm for the KZ and the ZN although neither service manual tells of the measurement of the base circle of the cams so I'm unable to tell you the lift of the lobes which also would be relevant.

I'll suggest that the ZG1300 Swiss model may have even milder cams than the European spec ZG but without a ZG service manual to confirm , I can only speculate.

Hi guys
According to what I remember the power restriction consisted of two elements:
1) air-filter (with limited air-flow)
2) a mechanical limit for the throttle

If you want I can verify with the German community ?
Holger

Hello Holger ( l know that name from many years ago forums ) thank you so much for your reply, yes please any information will be greatly appreciated, the bike is a stunner but slow, please any information, thanks Ross

Hi Ross, here what I found out so far:
- reduction on the carburetor as mentioned: an air-filter with limited flow volume as well as different jets
- no specific information on the DFI models
- I recall information about mechanically limited throttle (easy to overcome by removing or bending the stopping sheet).
- For even further reduction (Switzerland !) talk was about an exhaust system with endpipes with reduced diameter

hope that helps ...
Holger

Hello Holger and thank you, this helps, the bike is 1986 DFI hopefully can get more information, thank you.