A compression gauge isn't going to tell you what CR you are at........that is going to tell you the Cold Cranking Compression.

But with your CCC and the cam specs and a few other numbers, you can plug them into a calculator like the one on Big Boyz website.........and it will give you your approx. CR.

Steve

 

CCC is what I was looking to get, I've been on the BB site and I've learned it doesn't take much to throw the numbers way off, so I want to see it on a gauge. I've been hearing about advancing the TW6 so much it has me wondering what it would do for me.

 

i dont know much but i have been where he is at trying to figure out how the hell i got here.

 

Hey guys, forgive my ignorance but can you explain how to CC the heads and measure the deck height or is this way over a novice's head. Is this something that a machine shop needs to do? I have access to depth guages, dial indicators, and calipers...???

Mike

 

To measure the deck height you will need a set of feeler gauges and a straight edge. You have to have the top end removed from the motor down to the cylinders with pistons in them. Bolt down the cylinders so they are tight to the cases and won't move around. Put each piston at it's highest point by turning the rear tire with the bike in 5th gear. When you find the highest point, lay your straight edge over the middle of the piston and use your feeler gauges to measure from the center of the piston to the straight edge if you are low. If you are high, measure from the straight edge to the top of the cylinder sleeve.

CC'ing the heads is something I leave to my head guy......Big Boyz Cycles. I know how it's done, but I've never done it myself. Maybe someone will chime in with their technique for doing it.

Steve

 

to cc the heads you need a Burette with cc measurements, take a some colored liquid (food coloring in rubbing alc works so does marvel mystry oil) take a flat piece of plex glass and drill a hole in the center, take some grease to make a seal and place the plexi glass over the head and turn the head upside down and fill thru the hole in the plexiglass make sure that it is completely full of the liquid and there are no air pockets and the amount of liquid used is the cc volume of the head. have the sparky installed.

 

Guys, thanks for the info...that's good stuff.

Can someone recommend a good place to get the heads shaved? Will they rework them if they have already been "touched"?