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"Loose" intake valve clearances

  • Thread starter Thread starter norman1950
  • Start date Start date
N

norman1950

Guest
Bare with me on this, as I am a newbie to working on Valves. Since the bike is torn down thought it would be a good idea to check the valve shim clearances. In doing so I have printed out the Valve shim sheet and noted all my clearances and what current shims are in the bike.

So my real question is on #3 and #4 intake valves, the clearances are .007" with both having shims of 2.45. Is there something I need to worry about with that much clearance or just get a 2.50 shim for each valve.

Just for reference here is how everything measured out and the shims

....................................Exhaust
Gap .002............Gap .003............Gap .0015...........Gap .003
Shim 2.65...........Shim 2.60...........Shim 2.60............Shim 2.55x

......#1....................#2....................#3.....................#4

....................................Intake
Gap .004............Gap .003............Gap .007............Gap .007
Shim 2.60...........Shim 2.55x.........Shim 2.45...........Shim 2.45



Thanks for helping a newbie out
 
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to start id swap exhaust 1 and 3 then recheck what you need for exhaust 3
recheck ex 1 while your going
ozman
 
The specs call for a range between .003 to .008. Oz is right, your intakes are in spec, but you're tight on exhaust 1 & 3.
 
Exhaust valves get hotter than intake valves. I always set my exhaust with more clearance than the intakes.
 
earlfor said:
Exhaust valves get hotter than intake valves. I always set my exhaust with more clearance than the intakes.
Click to expand...


very good advice there i like 0.06 to 0.08 on exhausts for that reason
0.04 to 0.06 on inlets
i talk in mm not imperial thou

ozman
 
Last edited:
jsandidge said:
The specs call for a range between .003 to .008. Oz is right, your intakes are in spec, but you're tight on exhaust 1 & 3.
Click to expand...
BE VERY CAREFUL WITH THIS ADVICE. :eek:

The proper clearance specifications are 0.03 to 0.08 mm. Note that there is only ONE zero between the decimal and the first non-zero number.

If you are using INCH measurement devices, the specifications are 0.0012 to 0.0031". Note that there are two zeros between the decimal and the first non-zero number.

It is also very important to note that there is a number 3 in both sets of specs, but one is for maximum clearance, the other is for minimum clearance.

Norman, I would switch your #3 and #4 intakes to 2.55s, and your #3 exhaust to 2.55, assuming that you are using INCH measurements.

.
 
Steve said:
BE VERY CAREFUL WITH THIS ADVICE. :eek:

The proper clearance specifications are 0.03 to 0.08 mm. Note that there is only ONE zero between the decimal and the first non-zero number.

If you are using INCH measurement devices, the specifications are 0.0012 to 0.0031". Note that there are two zeros between the decimal and the first non-zero number.

It is also very important to note that there is a number 3 in both sets of specs, but one is for maximum clearance, the other is for minimum clearance.

Norman, I would switch your #3 and #4 intakes to 2.55s, and your #3 exhaust to 2.55, assuming that you are using INCH measurements.

.
Click to expand...

Yes I was using inch measurements. I should have stated that earlier.

Ok good at least my thinking was similar to yours. I was just over thinking it.

Thank you all for your inputs.
 
Got the shims, now to find time to go to the shop and check clearances.

Thanks again for all the help, will report back shortly.
 
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