Ideally try for a maximum of 3 degrees (engine and gearbox down) and 3 degrees diff (pinion up).47chevyvan wrote:hi hope you had a Christmas and have a good new year . have you thought of lifting the front of your engine ? if you have a angle finder the engine must sit between 3 - 5 degrees up at the front to give you the proper uni angles check it at the crank ? it looks like your engine can come up at the front about 50 - 60 mm ? . I check my motors where the carby fits that should be horizontal at ride height or close to it ! this might save you from cutting the sump . good luck
This gives a tailshaft angle of 6 degrees “slope”, so each component is at 3 degrees to each other.
Sometimes this is bloody hard to achieve, especially if joy have a longish motor and gearbox combination.
Most tail shaft guys and pinion manufacturers recommend 1 to 3 degrees to make the uni’s “work”and keep the harmonics correct. Nothing worse than tailshaft vibrations caused by bad harmonics.
This won’t always give you correct carb angle, but a machined angle spacer will take care of that. Remember the only time that the carb will be level, will be on a level surface. Great for setting float level, but while driving the level changes all the time.
Have fun.