I am rebuilding my modified XV920RH. 94mm Venolia pistons, Megacycle X2 cams,Megacycle hardfaced rockers, RC race springs w/titanium retainers, custom LA Sleeve cyl liners to use later XV1000 cyl head gaskets, Mikuni HS40 flat slide carbs, K&N dirt track style air filters, Mac 2 into 1 header with Supertrap 2 1/2\