Author Topic: 86 lt250r rebuild help (Read 1386 times)

Wheeling · « **on:** June 23, 2013, 11:09:40 am »

rebuild is in the process. all is well UNTIL I put the cylinder on the motor. The piston jams at close to the top of the stroke! then it just seizes up until I knock it out. BUT WHAT IS CAUSING IT TO JAM IN THE CYLINDER???

LT250RWV · « **Reply #1 on:** June 23, 2013, 11:55:08 am »

Can you take some pics of it. Is it the right piston? How done the bore?

Wheeling · « **Reply #2 on:** June 23, 2013, 12:07:03 pm »

Can't see how pics will help can't really see anything it's the exact same size piston that came out I'm just replacing the piston and rings but it turned into a headache!

LT250RWV · « **Reply #3 on:** June 23, 2013, 12:57:40 pm »

What kind of piston is it? Are you getting the rings into the metal taps on the piston? Pic could tell us if something is wrong your not seeing!!

JayTater · « **Reply #4 on:** June 23, 2013, 01:51:59 pm »

Was the cylinder ported, and were the ports chamfered? Sounds like a ring is catching the lip of the exhaust port..

Wheeling · « **Reply #5 on:** June 23, 2013, 04:06:56 pm »

Nothing was changed old piston and rings out and new piston and rings in!

Rider414 · « **Reply #6 on:** June 23, 2013, 07:01:15 pm »

Do you have the ring gaps aligned right? Is the arrow on the piston facing toward the exhaust?

Wheeling · « **Reply #7 on:** June 24, 2013, 05:13:16 am »

I have the gaps at the little pins and yes the piston arrow is facing forward

LT250RWV · « **Reply #8 on:** June 24, 2013, 05:36:20 am »

Did you try the old piston back in again to see if it went in fine. Have you check your new rings inside the cylinder to see what the gaps are. If you havent, check them in the top and take the piston threw the top with no rings and use it to push the ring down the cylinder.Check the top and middle and bottom. Also have you measured your new piston. Hope this helps you.

Wheeling · « **Reply #9 on:** June 24, 2013, 08:03:46 am »

Ive measured the piston and its the exact same size that came out. Ill try the pushing it thing. Sadly im only home on weekends. Work during the week. so I cant try anything till Friday evening.

GrkGuy · « **Reply #10 on:** June 25, 2013, 12:51:54 pm »

sounds like one of the rings is not lined up with pin.

Zilla273 · « **Reply #11 on:** June 25, 2013, 04:33:42 pm »

have u tried turning it over with the base gasket bolts loosend? if piston is the same and the rings are aligned with pins and bottom end wasn't disassembled, u may have a bent rod

Wheeling · « **Reply #12 on:** June 25, 2013, 04:52:55 pm »

I will look into everything suggested this weekend when I get to work on it.

Wheeling · « **Reply #13 on:** June 29, 2013, 12:51:16 pm »

Found the time to go work on her. It seemed to go well my only problem now is I cant get the rings to stay on the pins? whenever the cylinder is installed the the rings around the piston aren't even all around. I assume because there on top of the little pins? So how do I fix this?

JayTater · « **Reply #14 on:** June 29, 2013, 06:12:30 pm »

Hope the rings didn't distort or scratch your cylinder... Usually, its pretty simple to hold them in place by hand while you're dropping the cylinder into place.

Wheeling · « **Reply #15 on:** July 06, 2013, 12:14:20 pm »

SHE LIVES!!!!!! Somewhat....... It starts just doesn't want to idle I have to keep giving it gas to keep it alive. I'd normally take it for a drive to clean out but I was hoping to do a few heat cycles before taking it for a drive. What do you guys suggest? Btw putting the choke on just kills the motor.

Wheeling · « **Reply #16 on:** July 06, 2013, 03:12:37 pm »

Carburator was cleaned well and my pilot is a 57 it worked well before the rebuild

Andys92 · « **Reply #17 on:** July 06, 2013, 06:40:02 pm »

57 pilot , wow that sounds big!! i run 37.5 and that is still very slightly rich ,

Wheeling · « **Reply #18 on:** July 06, 2013, 06:50:37 pm »

That's what I thought to! Do you have similar mods as my bike has?

Andys92 · « **Reply #19 on:** July 07, 2013, 11:37:14 am »

only difference i had was i had a stock filter with lid.

News:

Author Topic: 86 lt250r rebuild help (Read 1386 times)

Suzuki Quadracer HQ Store Zone