No Compression!

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No Compression!

Post  mtcutr on Tue Nov 20, 2012 2:15 am

My good friend from CT came for an extended visit (unemployed again) here in sunny SW Florida a few months ago, and he just happened to have a 2001 xr650 in the back of the truck Smile
It wasn't running to good and difficult to start, so I went through the fuel sys. and uncorked the pig. Started 1 kick every time and ran great.
My friend left and I convinced him to leave the bike behind. YESSSSSS!
Just recently I went out for a spin, the motor started to "run away" like it was sucking air and fuel WFO! yet the throttle was closed. I had to use the kill switch for what seemed like forever to shut it down.
Now it has no compression.
I think a leakdown test is where I should start, but does anyone have any experiance with what I described or a good idea what happened?
Thanks
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mtcutr
L Rider

Joined : 2012-11-17

Posts : 1
Location : port charlotte fl
XR650R Year : 2001

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Re: No Compression!

Post  BuRP on Tue Nov 20, 2012 5:40 am

Carb, plus the cables (1 loose or broken) - fix all that first, it got stuck, and you don't want a repeat.
Then, before you take the top off, take off the decomp cable, at the head!, and make sure that lever moves back - still no compression?
Then take the top off, and if I were you I'd take the jug off too.
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BuRP
XRR Monger

Joined : 2010-10-18

Posts : 1576
Location : Pretoria Souf Efrika
XR650R Year : 2007

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