Tomorrow's 50th birthday celebrations of the 500 Motor Racing Club of Ireland at Kirkistown features the Irish Formula Vee Festival and a demonstration of an ex-Graham Hill Ford GT40 by Ulster hillclimb specialist Richard Young.

There will also be the appearance of three British Touring Car Championship aces - reigning champion Alain Menu and Jason Plato in two Williams Renault Lagunas and 1995 champion John Cleland in a Vauxhall Vectra SRi.

Hot favourite for Formula Vee Festival honours is defending champion Ray Moore. The 37year-old Dublin driver has two wins in the Irish and British Championships already under his belt this season driving his Kildare-built Leastrone.

The rally action on Sunday will be in the Woodland House Hotel Circuit of Munster, run out of Adare by the Limerick Motor Club over 3 x 3 stages at Shauntrade, Beigh Castle and Barrigone.

Dermot Carnegie and Helmut Holfeld are the leading contenders in Sunday's final round of the RIAC National Rallycross Championship at Mondello Park.

The two day's enduro events run out of Kilcash, Clonmel, tomorrow and Sunday, count for the Irish Championship. With three rounds completed, just five points separate the top three riders in the exports grade - Adrian Lappin, Vinny Fitzsimons and Stanley Callaghan.

With a perfect score of three wins, Brian Mulvey dominates the seniors grade; and in the clubmans, William Herron, and Brian Gleeson are separated by just one point.

Skerries Motor Cycle Club stage a two-day grasstrack racing festival at Killinkere, between Virginia and Bailieboro, Co Cavan, on Sunday and Monday.

Saturday: 500 MRCI motor racing, Kirkistown, Co Down, 1.0; TORC Enduro, Kilcash, Clonmel, Co Tipperary, 11.0.

Sunday: Limerick MC Circuit of Munster, starts Adare, 11.40am; TORC Enduro, Kilcash, Clonmel, 11.0; Carlow CC Rallycross, Mondello Park, 11.0; MRCCI, midget car racing, Fox & Goose, Clara, Co Kilkenny, 3.0; Skerries MCC Grasstrack Racing, Killinkere, Co Cavan, 4.30.

Monday: Grasstrack racing, Killinkere, Co. Cavan, 12.0.