[punk77]

Hi can anyone help me with changing to 17inch wheels front and rear on a 1988 GPX 750 please?

 

[machinemase]

this site may help!http://www.gpzfighter.co.uk/how-to/how-to-fibreglass-body-panels-together

 

[Mustapha dump]

Try using ZXR400 running gear, it's a 160 rear tyre so shouldn't cause issues with chain run etc. Or GSXR750J/K which is also a 160 rear with 20mm spindles on both front and rear 310mm discs. You would be better transplanting the entire front end into your bike as it will make it much easier with disc size and offset etc.