Hello every body. I search all mesurement,schem, plan, developed... for make himself complet exhaust for my rd500. I see for GP model like JOLLY, NIKON... But with upper approx straight for mount with YZR500 replica race rear seat. Lower for mount with TZ250 gp modified swingarm. Perhaps some peoples can help me. Thank's. Greg from Belgium. email adress: retchpo_one@hotmail.com