HS 40 cams

R

RT MAN

New Member
#1
#1
I have three different HS 40 cams, I guess one will provide more power a different rpms. I will post pictures.

I got them from a snow blower, a roto tiller, the other I don't remember
 
Last edited:
R

RT MAN

New Member
#2
#2
RT MAN said:
I have three different HS 40 cams, I guess one will provide more power a different rpms. I will post pictures.

I got them from a snow blower, a roto tiller, the other I don't remember
Click to expand...
Two cams on the left are the cam on the right stays oprn for a much longer duration. What power differnce would there be between these two different types.
 
R

RT MAN

New Member
#4
#4
lawn-boy biker said:
No difference. Affects dwell of points or duration of coil charge up. May or may not be interchangeable.
Click to expand...
but doesn't the cam open and close the valves. Actually I remembered there is a gear driven cam inside. So I wonder why they made this cam at the most it might provide a longer spark time maybe made sure the fuel was fully burned.
 
Last edited:
cncsparky

cncsparky

New Member
#5
#5
Your picture is the ignition cam, for opening and closing the points. The valve camshaft is completely different and different ones can have a significant effect on performance.
 
R

RT MAN

New Member
#6
#6
cncsparky said:
Your picture is the ignition cam, for opening and closing the points. The valve camshaft is completely different and different ones can have a significant effect on performance.
Click to expand...
I think the motor that had the different ignition cam was from a roto tiller which in my opinion probably require more torque than the snow blower which probably required higher revs , I haven't check the valve cams to see if it was different but I'll bet it is.

cncsparky
Thanks for reminding me. any experience with roto tiller motors in a mini bike
 
You must log in or register to reply here.
Top