Hypothetically speaking

husabutt · Oct 30, 2006

What would be the consequence of running with the valves continually and way out of adjustment? Just curious what components would be the most and least affected other than the bike being difficult if not impossible to start.

Taffy · Oct 30, 2006

hi eric

on my pantah that would be easy to answer - the rocker arm! and thus the cam as well, all graunched and scored. i would imagine it would be the follower bearings would overheat and give up. then score the cam. doubt the valve stems would even notice bar the extra heat. oil would also give up very, very soon with those temps.

as the yanks would say: 'heat kills!'.

regards

Taffy

Johnf3 · Oct 30, 2006

husabutt said:
What would be the consequence of running with the valves continually and way out of adjustment? Just curious what components would be the most and least affected other than the bike being difficult if not impossible to start.

Valves that are "tight" on the exhaust eventually lead to burned valves due to a poor seal and hot exhaust gas leaking by. Loose valves on the exhaust side can make the decomp. mechanism not engage and cause the engine not to turn over due to high compression.

Tight intakes cause a hard to start when warm problem, but the bike may start fine when cold. Tight exhausts can lower compression and cause performance issues, too.

Others more knowledgeable will add more consequences, but these are a few I'm aware of.

husabutt · Oct 30, 2006

That all makes sense to me. Whenever I adjust the valves they are tight. Why as things become worn does the clearance decrease?

Taffy · Oct 30, 2006

the valves peen the seats hardening them and compressing them, they therefore sink into the head and close the clearances.

regards

taffy

dsducati · Oct 30, 2006

Seats cut into the soft intake faces causing them to sink into the head tightening the clearance causing the roller to turn all the time smoking it and making it hard to start all at the same time. Lovely huh. Too loose, and the clearance ramps that gradually open the valve are bypassed and the rocker is hammered into the valve stem opening up clearance even more til it rattles like crazy. People talk about high revs and abrupt cam profiles causing the intakes to sink, but all to often it is due to dust.
dan

Hypothetically speaking

Help Support Husaberg:

husabutt

Taffy

Johnf3

husabutt

Taffy

dsducati

Similar threads

Register CTA

Recent Discussions

Recent Discussions