Nice bike! Kept in wonderful external condition. Mine looked like that 100K ago. :-(
Can you provide a photo of your existing engine and sump casting? The slightly older Guzzi Tontis had a shallow sump bolted directly to the engine casting. Guzzi extended the sump around 97/98. I suspect that the bike you have came from the factory with a 1" spacer already in place to lower the sump. Assembly required two identical gaskets. One between the sump and spacer and the other between the spacer and engine block.
Shortly after, Guzzi produced a much deeper sump casting and abandoned the 1" spacer. (thus requires only one gasket). I think the deeper sump casting came with the Jackal perhaps?? Not sure when the change occurred. Guzzi is famous for using up old parts stock and substituting new in mid-production. Your pictures will determine which you have.
Can you show a picture of your new sump extender? I suspect that you can just swap the new, external extender for the original. Bolts and gaskets will all be the same. However if you have the later/deeper sump you likely will not be able to install your new spacer. If so, it shouldn't be too hard to find a used original shallow sump and use that with your new spacer to get the factory effect.
BTW, the purpose of the sump spacer is to lower the high tide level of the oil pool and increase the volume of air space inside the engine above the oil. It is NOT intended for you to add a larger capacity of oil. The whirling crankshaft tends to splash into the oil puddle. The "V" engine design causes the air space inside the engine to increase and decrease with every rotation. Together, these design factors can promote oil leaks. Lowering the sump and puddle reduces both.
BTW #2, I think the original oil dipstick came in two versions to match the changed oil level. Three quarts or three liters and forget about the stick level.
Patrick Hayes
Fremont CA
