Engine built by Johannes Persson:
TodayCase: original AS41
Pistons:JE 86mm 24mm comp hight
Cylinders:Stock 85,5mm honed to 86mm
Heads:043 40x35mm valves
Rockers:Jpm two stud 1,5:1 ratio
P-rods:Manton 3/8" cromoly
Flywheel:180mm stock lightend
Clutch disc:cush lock
Header:Custom made 1 5/8" tuned length
Manifolds:Custom made tuned length(second order)
"Changed the main venturies from 37 to 39mm.
The engine responded really good with an improvement from 138,8-143,3kW or 188,7-194,9hp the torque increased from 191-195Nm (138-141lbs).
The attiude of this engine is really something, nice and smoth at idle and kicks really hard if you want it to".
"There would probably be some more improvements with bigger venturies but as it is now there is no bog or hassitation between low and high circuit and as this engine is to be used on the street I prefere to have it like this.When using too big venturies you often notice a hassitation between low and high circuit even sometimes with the third progression hole modification."