rockdancer
Husqvarna
Pro Class
What I would do is convert the YZ to a 139 - have a look on the Max power website they say its the best and better than 144
I have heard many reports about the yz 125 being preferred to the 144
The 139 may the best for keeping top end - over-rev but also more low to mid .
In the husky I still think the 125 is the best fun motor and it sings the most sweetly after recently switched from 125 to 144 to 165 to 125 to 165 and back to 144 again

Would like to try the 177 kit too . Didn't like the 09 ktm 200 power delivery - too abrupt and no top end
Loved the mid of a Yz125 .
Would like to try 139 kit and probably will as I have a damaged 125 cylinder
(Or buy a ktm 150 if you like the ktm )
I have heard many reports about the yz 125 being preferred to the 144
The 139 may the best for keeping top end - over-rev but also more low to mid .
In the husky I still think the 125 is the best fun motor and it sings the most sweetly after recently switched from 125 to 144 to 165 to 125 to 165 and back to 144 again


Would like to try the 177 kit too . Didn't like the 09 ktm 200 power delivery - too abrupt and no top end
Loved the mid of a Yz125 .
Would like to try 139 kit and probably will as I have a damaged 125 cylinder
(Or buy a ktm 150 if you like the ktm )