About to check valve clearance, need help understanding measurments
#1
![Question](https://cbrforum.com/forum/images/icons/icon5.gif)
I'm getting ready to do a valve clearance check on my 01 CBR600F4i.
I have the factory service manual so I know what I have to do and how to do it. The only thing I want to know is, what is the valve clearance measurement I should be trying to get? For example, the manual says the intake valve clearance should be 0.20 +- 0.03 mm so does that mean that if I have to replace the valve shims I should try to get as close to 0.03mm as possible? Or does it mean I should get as close to 0.20 mm as possible? Or does it mean I should try to get the clearance right around the middle at about 0.11 mm?
Also, if the valve clearances are somewhere between 0.20 - 0.03 does that mean that I don't have to replace the valve shims and won't have to check it for another 16,000 miles?
I'm really confused about this...don't know if the clearance decreases over time due to the valves seating further in(meaning the valve clearance should be set as close to .20 mm as possible) or of the clearance increases due to carbon buildup(meaning the valve clearance would need to be set as close to .03 mm as possible).
I have the factory service manual so I know what I have to do and how to do it. The only thing I want to know is, what is the valve clearance measurement I should be trying to get? For example, the manual says the intake valve clearance should be 0.20 +- 0.03 mm so does that mean that if I have to replace the valve shims I should try to get as close to 0.03mm as possible? Or does it mean I should get as close to 0.20 mm as possible? Or does it mean I should try to get the clearance right around the middle at about 0.11 mm?
Also, if the valve clearances are somewhere between 0.20 - 0.03 does that mean that I don't have to replace the valve shims and won't have to check it for another 16,000 miles?
I'm really confused about this...don't know if the clearance decreases over time due to the valves seating further in(meaning the valve clearance should be set as close to .20 mm as possible) or of the clearance increases due to carbon buildup(meaning the valve clearance would need to be set as close to .03 mm as possible).
#2
#4
![Default](/forum/images/icons/icon1.gif)
Ooohhh I got you! So the clearance is supposed to be .20 but it can have a .03 mm difference added or subtracted and it will still be in the safe range. That makes sense, should have realized that. So then does that mean that if all the valve clearances are between .17 - .23 mm I won't have to replace the shims and won't have to check it for another 16,000 miles or should I replace the shims even if it's within the .17 - .23 mm spec so I can get it as close to .20 mm as possible? My bike has 20,000 miles on it so not sure if the valve clearances could still be within the spec or if I will most likely have to change the shims.
#5
Thread
Thread Starter
Forum
Replies
Last Post
Krux
F4i - Main Forum
9
12-14-2011 05:24 PM