Wow. Those are clean! Thank you for the information. Any idea on where I can get an assembly that clean??

1977 JD300 here. The whole rear pivot assembly is seized/fused. I sheared the bolt (#1 in schematic below) on both sides. I was finally able to get the arms off (#11 in schematic) I will have to go to a machine shop and have a new axle made with tapped ends (#17 in schematic). Are these bushings bel...

260 main?
35 pilot?

I acquired a jd300 1977 and it turns out to have a mikuni with “34-370” stamped on it. It is a 34mm. When I took the carb apart the pilot jet was missing and the main jet has no markings on it.

Any advice on what to jet this thing at? For main and pilot? Thanks!

Congrats on starting a resto on your 300. Some good news is that the drive axle, rear axle and upper chain case bearings are still available new from Deere. The o-rings on the chain case side bearings are also still available new. I have a bunch of the rear axle bearing wraps if you need any. Good ...

Anyone know where to source the rubber bearings at the end of the idler wheel?? M63039

Thank you all for the awesome responses. I have the black ppds. How should I bore them? Lathe? What type of shop will do them for me?

Hi. First post. A friend of mine gave me a 1977 JD 300. I am starting to restore her. I got the motor out and finally got the track off (pain in the butt). Stripped her down. Can any of you help me find some parts? - O-Ring for brake/drive sprocket (U17502) - Bearings (x2) for drive shaft (jd8555) -...