The OBSERVED Valve Clearance thread

[Jurlie_imp]

Thanks Jurlie, the reason for the old and new shim sizes is simple;
1 we get an idea what shim sizes and how many are required and;
2 we learn about valve clearance behavior in our bikes.

As far as i can work it out my cb919 and the cb1100 use the same size shims ( 7.48 mm. ) and also the same shim thickness ( ranging from 1.95 to 2.05 mm ) and we need more than 3 as supplied with the usual kit of the same size.

For a quick overview we created this thread and a spreadsheet for this purpose;
https://docs.google.com/spreadsheets/d/1...=473671721
as of yet i have only bought shims with 0.05 mm interval but would like to get the in-between 0.025 interval as well for the future.

Out of interest did you un-tension the cam chain when measuring?

I had no idea they are sold as a set. First thing that I've found are individual shims on Partzilla or BikeBandit for $6 a piece. I've ordered and waiting for delivery currently.

Thanks Jurlie, the reason for the old and new shim sizes is simple;
1 we get an idea what shim sizes and how many are required and;
2 we learn about valve clearance behavior in our bikes.

As far as i can work it out my cb919 and the cb1100 use the same size shims ( 7.48 mm. ) and also the same shim thickness ( ranging from 1.95 to 2.05 mm ) and we need more than 3 as supplied with the usual kit of the same size.

For a quick overview we created this thread and a spreadsheet for this purpose;
https://docs.google.com/spreadsheets/d/1...=473671721
as of yet i have only bought shims with 0.05 mm interval but would like to get the in-between 0.025 interval as well for the future.

Out of interest did you un-tension the cam chain when measuring?

I was following the manual: using special tensioner tool for a hundred bucks I've screwed tensioner clockwise as much as it allowed. Was that un-tensioning?


For moderator:

could you please replace the numbers in my previous comment with following? I've added the shim marking.

Clearance; Old shim size; (Old shim marking); New Shim Size
Cyl 1:
Ex
0.31 2.012 (200) 2.050
0.33 1.976 (198) 2.025
In
0.18 2.027 (202) 2.050
0.19 2.027 (202) 2.075

Cyl 2:
Ex
0.30 1.930 (192) 1.950
0.33 1.928 (192) 1.975

In
0.18 2.029 (202) 2.050
0.20 1.981 (198) 2.025

Cyl 3:
Ex
0.32 1.910 (190) 1.950
0.32 1.908 (190) 1.950
In
0.19 1.979 (198) 2.025
0.19 1.956 (195) 2.000

Cyl 4:
Ex
0.30 1.910 (190) 1.925
0.30 1.915 (190) 1.925
In
0.21 1.956 (195) 2.025
0.21 1.981 (198) 2.050