View Full Version : Doppler High Compression Head

04-21-2006, 01:44 PM
does anyone no if the doppler high compression head will fit the standard barrel,i know they make one for the derbi engine that goes striaght on its standard barrel and gives good gains.

04-21-2006, 05:09 PM
You can get high compresion heads for the stock barrel but is it worth it? most stock cilinders for the RS50 are restricted on the size of the exhaust port and the stock cilinder of my RS50 engines both had a high compresion head stock so i doubt changing the head on the stock cilinder would really make a big difrence.

04-21-2006, 05:11 PM
ive got 3 spare barrels ive had a play with so i was just wandering,do you know who makes there heads?

04-21-2006, 05:18 PM
I know Top Performances had on for the RS50 OT but it was basicly the same compresion as a 1999-2000 cilinder head, ive got a OT cilinder head here and that one has a way bigger combustion chamber than a NM head.
So i dont think there being made anymore for the RS50.