Valves

[n7qnc]

Does anyone know what the angles on the valve seat of an XS1100 should be?
Thanks.

[mro]

angles on the valve seat

45%

As per the valve, "service limit" above angle 0.7 mm

bevel width bottom of valve stem 0.5 mm and stem end minimum lenth 4.0 mm

max valve stem clearance intake 0.10 mm, exhaust 0.12 mm
will need to check dia of valve stem and of valve guide to find if still in spec.



mro

[trbig]

" The valve seat is subject to severe wear. Whenever the valve is replaced or the valve face is re-surfaced, the valve seat must be re-surfaced at a 45 degree angle. If a new valve guide has been installed, the valve seat must be re-cut to guarantee complete sealing between the valve seat and the face. If cutting section "A" of the valve seat, use 30 degree cutter. If cutting section "B" use the 45 degree cutter. If cutting section "C" use the 60 degree cutter."



As plagiarised from my book.... lol.

Tod

[n7qnc]

Thanks for the information. This will help me a lot.

[mro]

ya, what trbig said

seat width 1.3 mm (standard) 2.0 mm wear limit
(surface contact width between valve and seat, 45% part)


mro


hey trbig, ya got a scanner???
cool posting images too.

[trbig]

hey trbig, ya got a scanner???

Nope... just a digital camera I use as one on occasion!

Tod