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View Full Version : 350x connecting rod play



twitch101
08-28-2010, 12:54 PM
maybe the real question is "is there to much play" ive never went through an atv engine like this before so before i jump out and spend the money or even split cases i thought i would get some advice from the experts. what im concerned about is the wobble you se in the video "top goes left bottom goes right"

or is that going to be fine once i get the new cylinder back on it.

http://www.youtube.com/watch?v=fMK0VBspJIs

NINJA
08-28-2010, 01:03 PM
Does it have play straight up and down? How many thousandths of an inch feeler gauge can you fit between the rod and the crank?

twitch101
08-28-2010, 02:25 PM
there is no up and down play but a connecting rod should only be able to move left and right with no wobble correct?

puggerton03
08-28-2010, 02:36 PM
Looks normal to me. Once the cylinder is bolted on there will be no side-side play.

twitch101
08-28-2010, 02:42 PM
alright thanks. i guess ill just run it as is then.

NINJA
08-29-2010, 12:36 AM
Some side to side play is normal. You don't truly know if it is too much or not unless you take a measurement with a feeler gauge and compare it to clearance specs in the book. Please, just do the measurement while you have the topend still off.

Puggerton, do you have a calibrated eye that can also compensate for video distortion so that you can spec out side to side rod end play? What if he puts money into a fresh topend on that motor and fires it up only to hear bottom end noise? whooops

puggerton03
08-29-2010, 01:17 AM
Yes, my eyes are calibrated. I did have laser eye surgery after all.