636 ?

[old man roger]

Originally Posted by fouroh8

keep it open to vent the crankcase, i'd throw a breather on it

Originally Posted by fouroh8

mod with T isn't sealed, it's open... with the T you would run the crankcase hose up to the T and the crankcase vents through the exhaust.
the way yours is it's sealed off on the valve cover so you have to vent the crankcase somehow. if you cap the crankcase it has no where to vent. put a hose with some sort of breather to catch whatever oily air is going to vent

Originally Posted by fouroh8

i just did the mod but instead of a brass T i just took the vacuum line off the valve and ran a hose from the crankcase to the valve. it runs smoother throughout the rpm's
the sealed way isn't bad you just don't get the added ventilation help from the exhaust

ya what he said