Yes to make the shock and linkage work as they were (I didn't want to have a custom shock made). If I used the 250R swingarm and shock locations, the shock clevis bound up on the rear linkage and there was too much up travel with 20" tires. You might be able to get away with it for 18" tires (MX) but you need to go through all the measurements and calculations to get it right.
I would get a Pumashine gusset kit on that frame asap. Crack city if you plan on doing some serious MX
this is true info on the gussett kit.. thats why i bought one cause of hitting alot jumps and started getting cracks here and there
Rear end done and gussets added. Waiting on nerfs, clutch cover, and radiator!
Wow, first time I have ever seen gussets put over such a nice looking PC
Looks good! Hows that rear shock setup working for you?