lawn boy power

karl

Well-known member
Messages
2,447
Reaction score
706
Location
North east Ohio
Close. 1/4in end mill chucked in a drill press.

Almost done
 

Attachments

  • 20250212_173954.jpg
    20250212_173954.jpg
    2.4 MB · Views: 3
  • 20250212_174904.jpg
    20250212_174904.jpg
    1.9 MB · Views: 3

karl

Well-known member
Messages
2,447
Reaction score
706
Location
North east Ohio
I trained them well, its flat. After the race valves are situated and port work, ill lap it once more.

And ill be past 10 to 1 with a thick fiber gasket, and have plenty head/ piston clearance.
 

Attachments

  • image000000 (33).jpg
    image000000 (33).jpg
    209.8 KB · Views: 3

karl

Well-known member
Messages
2,447
Reaction score
706
Location
North east Ohio
Easy way to increase CFM on the factory carbs.

The throttle shaft is super thick , a dremel with
1/8in carbide burr, grind the backside of the shaft
down. Makes a big difference in WOT flow.
 

Attachments

  • image000000 (34).jpg
    image000000 (34).jpg
    136.9 KB · Views: 1

karl

Well-known member
Messages
2,447
Reaction score
706
Location
North east Ohio
Big advantage of the SS valves, they are one piece.

You can see where the head of the factory honda
valves were friction welded to the shaft, no good.

Liable to break off and ruin a motor, had that happen to a predator 224cc (junk)

And the SS valves are the same length, to run split keepers/ billet retainers
instead of the factory style keepers
 

Attachments

  • image000000 (34).jpg
    image000000 (34).jpg
    109.4 KB · Views: 4
  • image000000 (37).jpg
    image000000 (37).jpg
    212.1 KB · Views: 4

karl

Well-known member
Messages
2,447
Reaction score
706
Location
North east Ohio
Got fancyyy and used pinch clamps

Made the exhaust header, its ready to run. Now I need to build another chassis me thinks

I like the valve cover spacers
 

Attachments

  • image000000 (40).jpg
    image000000 (40).jpg
    258.4 KB · Views: 5
  • image000000 (39).jpg
    image000000 (39).jpg
    263.6 KB · Views: 5
  • image000000 (38).jpg
    image000000 (38).jpg
    231.6 KB · Views: 5
Top