I did a search on the model, and none of the other pictures show those fancy cooling fins. Was that a race model special feature or something aftermarket? It certainly looks cool. Reply
DG brand aftermarket head sold for the rd350 /rd400 apparently fits their ancestor the R5. gives it kind of a euro look imho Reply
Motorcycle Photo Of The Day 
I did a search on the model, and none of the other pictures show those fancy cooling fins. Was that a race model special feature or something aftermarket? It certainly looks cool.
DG brand aftermarket head sold for the rd350 /rd400 apparently fits their ancestor the R5. gives it kind of a euro look imho