Blog | Page 6 | Hartrusion

Gearbox Assembly #2

The gearbox shafts were disassembled, cleaned and put back together afterwards.

As the RS 250 uses a second oil pump to lubricate the gear shafts, the two bearings on the output side of the gear must be sealed on one side with a seal. The oil pump then presses the oil through holes in the gearbox shaft directly against the shift forks and bearings.

Gearbox Assembly #1

On the gearbox itself, all ball bearings are removed and replaced by ball bearings from SKF with polyamide cage. The reason for the replacement was a slightly rough running noise of the original bearings and the quiet running of the polyamide cage bearings. Unfortunately there are no pictures of this.

Cylinder coating, Cooper Power Valves

The first package from MuS Förster arrived, he checked the crankshaft and the cylinders. The crankshaft was in very good condition and was only re-balanced, the cylinders unfortunately had to be recoated because of a damage due to loose catalyst parts. I also ordered some small parts like gaskets there.

Gearbox Disassembly

The gearbox housing was cleaned with a special cleaning device, so all oil and dirt were off. The gearbox was removed. The gear shafts made a grinding noise when turning, it turned out that this came from the bearings. Since all ball bearings had these running noises, I ordered also equal a set of new ball bearings with polyamide cage for better quiet running as they are used in my RS125.