can someone inform me if the top ends are the same (wr500 --v--yz/it 490 ) it looks like the rod kits go from 1980-465 yz & it's....through to the 90's with yz and it 490's to the 92-93 wr500' is this the case or are there some abnormalities
what parts will interchange ie rod kits / pistons / barrels etc thankyou
