Help please - STUCK valve covers

[zcrenna]

I think the name says it all. Recently acquired a 73 CL 175 and need to adjust the timing (and would like to do valves at the same time), only problem is I cant get the valve covers off to save my life.
Luckily they're not stripped so I can get a good grip on them.

Tried:
a wrench..
tapping on and around the cover with a hammer
loosening then tightening then loosening and tightening. no luck.

looking at ordering some bolt loosening spray. you guys got any recommendations?

 

[Moa]

I'm not familiar with the 175, but if there's room to get a socket on them, I would suggest a socket and long breaker bar would do the trick. Although if the bolts are seized you wouldn't want to snap them.

 

[skatetheame]

Mine took some persuasion but I got em off with a 1/2" drive socket wrench.

 

[djelliott]

I'd say us a torch but if it's on the bike that may not be wise. Be careful because those caps will break.

 

[zcrenna]

Ya, i think i'm gonna go back to the socket with a breaker bar. thanks guys

 

[Sonreir]

These things break pretty easily. I'd try different combinations of heat and cold.

 

[zcrenna]

These things break pretty easily. I'd try different combinations of heat and cold.

Rad. I'll give that a shot too. Thanks

 

[carnivorous chicken]

Long bar for leverage -- but I've also learned that if they don't come out and strip, it's easy to take them off by chiseling off the outer edge of the cover (outside of the o-ring so bits don't drop inside). Once you've got some of it chipped off they'll turn off, and just replace with new.