"Pro X N224.103 Series Mikuni Pilot Jet" that one looks close and is dimensioned, you'll have to check the dimensions with the real one, here's some link with the right jet and a few dimensions
http://www.jetsrus.com/a_jets_by_car...t_VM28-486.htm
http://www.motorcyclecarbs.com/MIKUN...__P5549C28.cfm