Thread: New (old) stuff
View Single Post
Old 02-09-2016, 07:33 PM
Agreen's Avatar
Agreen Agreen is offline
Motorized Bicycle Elite Member
Join Date: Feb 2013
Location: Goose Creek, SC
Posts: 629
Default Re: New (old) stuff

Numbers from the 48 are in

I'm referring to zero degrees as TDC

Exhaust port begins to open at 110*

Transfers begin opening at 120*

The intake port begins uncovering at 50* before TDC, and (duh, shouldn't have to say this) closes at 50* after TDC.

Both the exhaust and transfers seem to extend a little below the top of the piston when at BDC.

I also checked the piston/cylinder deck height clearance. It measures in at 0.085" (at the crown of the piston.

I should have checked the cylinder head volume while I had it off, but I was too busy polishing the inside of the head. Then it got below 40 and I took my southern self inside.
Never stop wrenching
Reply With Quote