So things are getting weird.
For clarity, other than popping out of gear which is the reason for the tear down, my it250 runs super crisp. Gobs of power. Compression is spot on.
After taking the cylinder off, the piston looks perfect. Zero scoring on piston or cylinder. Rings also look perfect. So I didn’t plan on doing the piston which is a happy surprise.
However, here’s where things get weird. WTF… the connecting rod is bent. Slight bend to the left. How the F did this happen and why does the bike run great?
The only conclusion I came to is that before I bought the bike I assumed the previous owner seized the motor in a gnarly way, hence the slight rod bend, which is still impressive to bend a rod. So I assumed I’d now be at the 2nd or 3rd oversized piston.
Extra weird: nope. I’m at the stock size piston and cylinder. How the F did the rod bend?
Is it possible the dude replaced the entire cylinder and piston with a STD size? That seems unnecessary.
Is it possible when I submerged the IT in water in the pines, it got water locked for a second and that created the slight bend? I doubt it since I turned the bike off right away and pulled plug to drain water before starting it. Nothing makes sense.
So that’ll be another $150 to replace the crank and rod. Shit.
6 responses to “IT250 conundrum”
Published - Nov 26, 2010
Karl was a longtime Philadelphia area vintage motorcycle rider that frequented Two Wheel Tuesday from time to time. Some of you may have met him or saw him in his wheelchair last year at the Norton Gathering in Washington Crossing State Park. The photo above is of the gravestone Karl had pre-ordered the beginning of […]