Honda C90 – Cam to crank timing
The cam to crank timing is set when you assemble the engine. You must align the timing mark on the cam sprocket (a small “o”) …
Honda C90 – valve adjustment
Here are the valve adjustment instructions taken from a CT90 workshop manual (the late 1970s CT90 and c90 z2 shared many engine components): The idea …
Honda C90 – valve adjustment, finding TDC
Here is what Honda have to say about valve adjustment: A key point to note is that the measurement must be taken on the compression stroke. …
Washita Oilstones
Origins Washita oilstones are known and admired by craftsman the world over and all of them originate from a small mountainous region east of Hot …
The Record 74 Auto Vice
The Record 74 is an excellent little vice, it weights 26lbs , has 4 inch jaws and opens to about 4 1/2 inches. It was …
Yankee 1003 bench drill
The North Bros Yankee 1003 bench drill – and its larger sibling, the 1005 – is one of the finest bench drills ever produced. They …
Honda C90 – valve clearance
Once you have the engine back together an important job is to adjust the valve clearance (sometimes called “valve lash”). The clearance you are adjusting …
Honda C90 – valve seals
The valves are held in place by metal guides installed in the cylinder head and on some C90s (including the c90 z2) there is a …
Honda C90 – valve lapping
When doing a thorough overhaul of the engine you need to dismantle the cylinder head and inspect the valves. They will need to be cleaned …
Honda C90 – valve timing
Here are a few posts on the topic of valve timing and valve adjustment. Happily, since the c90 is such a simple engine, it is …