CV diaphragm springs

[bobgroger]

I am trying to find out what the PO did to this set of 1100e carbs. The diaphragm springs are only about 2" long, and the needle, while resembling the stock one, has 6 grooves for the e-clip. Can anyone remember a jet kit like this? The bike has K&N pods and stock exhaust (?). I am thinking the lighter spring would quicken the slide movement?

[londonboards]

That was probably the idea. You might also find that the hole that goes through the throttle slide has been drilled out so the air pressures between the vacuum created in the throttle body and the vacuum in the upper chamber can be equalised more quickly. This was done to provide a "snappier" throttle response.

Unless you are into racing big time, I would try to restore the carbs to factory settings, making the necessary adjustments for your K&N air filters. You should be able to make fine adjustments to the main jetting by adjusting the C clip up and down on the jet needle.

You need to do some plug chops (search this forum for "plug chops") to see how the bike is running now before you alter anything.

Although I would be tempted to get replacement springs and replace those first. Someone will have some spares.