A gal asked my son...

[trbig]

.. to get this little Honda Rebel running again for her. The starter would only go about a half turn and lock up for some reason. One cylinder looks just fine. The other... not so much.














Anyone got a spare 250 Honda Rebel motor layin' around? lol.

[DGXSER]

Ok, this seems to be much more common in a MC engine than I have ever seen in automobiles. What in the world causes the valve head to drop off the shaft like that?

[petejw]

Ok, this seems to be much more common in a MC engine than I have ever seen in automobiles. What in the world causes the valve head to drop off the shaft like that?

probably over heating/ lean mixture on an air cooled engine.

[motoman]

probably over heating/ lean mixture on an air cooled engine.

.........maybe......more likely way over revved and dropped valve spring keepers and the valve beat its way to the other side of piston............whatever the cause, a mood point at best......would think that model should'nt be too hard to find a replacement.....

[trbig]

After reading about them some, I guess it's a problem for the valves in them to stick in the valve guides or seals if they sit a bit. WHen they're supposed to retract, they just sit there like idiots and let the pistons run into them. Instead of bending, apparently these valves are a bit more brittle at the stem. I've seen several pics like it of these little motors.

[crazy steve]

And let me guess.... when you showed this to her, did she ask 'is that bad?'...

[Wildkat]

And let me guess.... when you showed this to her, did she ask 'is that bad?'...

[petejw]

.........maybe......more likely way over revved and dropped valve spring keepers and the valve beat its way to the other side of piston............whatever the cause, a mood point at best......would think that model should'nt be too hard to find a replacement.....

how does the valve collets dislodge in a valve?
if it was over revved and caused valve bounce
the valve stays open and then collides with the piston
after the valve has broken then the collets might drop out,
but not before hand, but as u say a mute point.

[trbig]

So... no comments from the only person I've seen do this same thing to an XS11?

[Wildkat]

Smarta$$


But I KNEW it was bad... and I fixed it myself... sooooo... no

Did I happen to mention you're a smarta$$?



and no... I don't know where you can find another engine for a Rebel. Except another Rebel.


Ooooooooohhhhhhh... mine's pretty intelligent too.
lol

[fredintoon]

- - - how does the valve collets dislodge in a valve? - - -

Hi Pete,
not from the factory, no. But some fumbling amateur may have botched the job the last time the lady asked for help.

[trbig]

No, this gal just bought this bike. Previous owners said it fell over in a wind storm and wouldn't start after that.

[Wildkat]

No, this gal just bought this bike. Previous owners said it fell over in a wind storm and wouldn't start after that.

Must have been one HECK of a storm!
lol


So what are(is) you (she) going to end up doing with it?

[BA80]

Must have been one HECK of a storm!
lol

Well, you know how this Oklahoma weather can be Kat.

[ddragon63]

Most Valves are 2 pieces. The head is fused to the stem. You wack the head with an aluminum hammer (piston) it will break off the stem. This is why Hi performance Automotive valves are 1 piece stainless. They take a better a$$ kicking before breaking or bending