As mentioned in another post, I am working on a XT250 (air cooled, 2 valve , sohc, ca 1980-82)
I have started some work on the head, and now I wonder if a slightly hotter cam is worthwhile or not.
Megacycle have a cam with 246/ 245 duration and .415/ .395 lift. Lobe centers 106/ 106.5 This camhaft also requires other springs.
The stock cam specs are 232/ 233 and .380/ .382 lift. Lobe centers 108/108
Not having messed much with 4 stroke singles, I wonder if getting this cam will give any meaningful power increase.
The only other real change, apart from lightly cleaning up the ports and a fresh 3 angle valve job, is a slightly larger diameter header and a Supertrapp muffler. I may also look for a slightly larger carb later.
My plan for this bike is just short trips, light commuting, maybe some winter riding on snow covered roads, possibly also some light exploring on trails and unpaved roads.
All and any input is most welcome
I have started some work on the head, and now I wonder if a slightly hotter cam is worthwhile or not.
Megacycle have a cam with 246/ 245 duration and .415/ .395 lift. Lobe centers 106/ 106.5 This camhaft also requires other springs.
The stock cam specs are 232/ 233 and .380/ .382 lift. Lobe centers 108/108
Not having messed much with 4 stroke singles, I wonder if getting this cam will give any meaningful power increase.
The only other real change, apart from lightly cleaning up the ports and a fresh 3 angle valve job, is a slightly larger diameter header and a Supertrapp muffler. I may also look for a slightly larger carb later.
My plan for this bike is just short trips, light commuting, maybe some winter riding on snow covered roads, possibly also some light exploring on trails and unpaved roads.
All and any input is most welcome