Thanks bundee, thats something else to take a look at. When I took the carbs apart the small jet on the bottom of each carb was screwed right in, thats
Replace the filters in the VST and get the injectors cleaned.
See if this works
Below from 10-15 seconds as you can see the motor is like cutting back :S
The only serial number range I could find is a 1936 model OK-75 8.10 twin do you