Has anybody hints how ST1100 valve gaps develop during the lifetime? Getting wider or narrower?
I measured valve gaps of my 1995 non-ABS ST1100 originally UK model 63733 miles ridden.
Intake: manuals tell 0.13-0.19 mm
1 front intake 0.13
1 rear intake 0.14
2 front intake 0.12
2 rear intake 0.17
3 front intake 0.16
3 rear intake 0.11
4 front intake 0.18
4 rear intake 0.16
exhaust: manuals tell 0.22 -0.28 mm
1 front exhaust 0.20
1 rear exhaust 0.21
2 front exhaust 0.25
2 rear exhaust 0.24
3 front exhaust 0.21
3 rear exhaust 0.21
4 front exhaust 0.24
4 rear exhaust 0.24
For me it looks that gaps are mostly at the narrow end. If gaps are getting wider during the life time I have no hurry to start playing with valve gap shims.
If the gaps are typically becoming smaller and smaller during the life time I most likely ride this season with gaps as they are now and will start messing with shims next winter.
I measured valve gaps of my 1995 non-ABS ST1100 originally UK model 63733 miles ridden.
Intake: manuals tell 0.13-0.19 mm
1 front intake 0.13
1 rear intake 0.14
2 front intake 0.12
2 rear intake 0.17
3 front intake 0.16
3 rear intake 0.11
4 front intake 0.18
4 rear intake 0.16
exhaust: manuals tell 0.22 -0.28 mm
1 front exhaust 0.20
1 rear exhaust 0.21
2 front exhaust 0.25
2 rear exhaust 0.24
3 front exhaust 0.21
3 rear exhaust 0.21
4 front exhaust 0.24
4 rear exhaust 0.24
For me it looks that gaps are mostly at the narrow end. If gaps are getting wider during the life time I have no hurry to start playing with valve gap shims.
If the gaps are typically becoming smaller and smaller during the life time I most likely ride this season with gaps as they are now and will start messing with shims next winter.