"Loose" intake valve clearances

[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

[ozman]

to start id swap exhaust 1 and 3 then recheck what you need for exhaust 3
recheck ex 1 while your going
ozman

[jsandidge]

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.

[earlfor]

Exhaust valves get hotter than intake valves. I always set my exhaust with more clearance than the intakes.

[ozman]

Exhaust valves get hotter than intake valves. I always set my exhaust with more clearance than the intakes.

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

[1980GS1000E]

I like to run max clearance to be on the safe side.

[cowboyup3371]

Have you emailed Steve for his spreadsheet yet?

[Steve]

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.

BE VERY CAREFUL WITH THIS ADVICE.

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.

.

[norman1950]

BE VERY CAREFUL WITH THIS ADVICE.

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.

.

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.

[norman1950]

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.