Straightening a bent cooling fin?

[buzbikebklyn1]

I managed to bend a cooling fin on a china girl 66cc cylinder head, any one know how to straighten a bent cooling fin with out snapping it off?
Its one of the tiny fins in front of the head bolt.
You just KNOW it will snap off if i try to pry it back into place... will the loss of this fin cause a heat problem?
BBB

 

[corgi1]

Unless your worried aboul people snikering about it,I would leave it alone

 

[Venice Motor Bikes]

Maybe try getting it real hot first? I once tried to bend one back & it broke off.

 

[2door]

Go real s-l-o-w...
Grab the fin above the bend, not below it and take it real easy. Try working along the length of the bend with the front of the jaws of a pair of pliers. The key is to work it carefully, don't try to bend it all in a quick motion.
Don't worry about cooling problems. Even if it breaks off it's not enough of a loss to be concerned with.
If it breaks, just file the rough edge smooth so it will look like it's supposed to be that way and nobody will notice.
Tom

 

[Venice Motor Bikes]

I JB welded the broken fin back on straight.

 

[Goat Herder]

I have done that too lol.

 

[2door]

I JB welded the broken fin back on straight.

I'm ashamed of you
Tom

 

[buzbikebklyn1]

You guys are the best... thanks.
and yes... i tried heating it and bending it back GENTLY but of course it snapped off.
Broke out the dremel tool, ground it down clean... no biggie, at least I've not noticed any temperature problems.
thanks again.
BBB

 

[buzbikebklyn1]

P.S.
Chinese beer cans must really suck!
I bet if they were made from Budweiser cans they might not suck so bad. LOL

 

[Goat Herder]

P.S.
Chinese beer cans must really suck!
I bet if they were made from Budweiser cans they might not suck so bad. LOL

The way things are these days we prolly get ''our'' cans from China. lol.

 

[2door]

The way things are these days we prolly get ''our'' cans from China. lol.

Just ask 'Ball' and the "American Can Company'. They'll tell you all about the Chinese cans that are killing their business.
Tom

 

[buzbikebklyn1]

The way things are these days we prolly get ''our'' cans from China. lol.

LOL, the sad part is your probably right.
maybe if they used more cans when they cast the engines?
GOD BLESS AMERICA
BBB

 

[Norman]

I've bent the fins back straight but I use heat from a propane torch.
I've also welded broken fins back on with that aluminum solder with no problem.
I'm going to have to cast a head just for the yell of it soon.
It will not have a combustion chamber when cast so it will have to be machined to size. anyone want one?
I've also melted down some of these engines. They are better than beer cans.