G'day dudes,
Temperature rise while speeding indicates faulty pipe cooling related to your radiator and piping.Usually clogged pipe due to rust and the ageing.
Mine changed the whole pipe and hose comes to about:
1. Water pipe - 45
2.U hose - 12
3. S hose - 12
4. Upper hose - 28
5. Clip hose - 20 @ 2/unit
Total - 117.00

if you like you can service your radiator about 70.
So you can budget about 200 for the maintenance...
Hope this helps...BTW mine is also Wira 94...