Does anyone know are they all the same? I have an unknown model with a low pressure spring which I will need to replace but I want to make sure it'll fit first. Here a couple of pics:
Cheers for the info Mikey! I've got in touch with Sumo Power as they are HKS dealers, hopefully they'll reply at some point, emailed them again today after waiting 2 weeks for a reply to my PM with nothing.