my L16 rolls 70mph @ 4000rpm's, 80mph @ 4600rpm it doesn't go much faster than that.
dont forget to check those brake hoses. they're probably pretty cracked. also a very good idea to clean and repack those wheel bearings. btw the inners are no longer available. then there's the king pins. i did mine recently. if you can buy the king pin set on ebay. they're the cheapest and japanese brands.