Posts
51
Joined
3/16/2023
Location
Chardon , OH
US
Edited Date/Time
4/7/2024 2:49pm
So picked up a bike. Guy had the clutch rod that engages the clutch basket snap. He's pretty sure he replaced that whole mechanism (rod, bearing, etc.) and even the arm on the left side that the clutch cable connects to. But there's no tension on the arm. See picture below. I can pivot that arm up and down with my finger. Pretty sure that should have tension on it? What say you?
Yes, you should not be able to pull that arm all the way up with no resistance… something is assembled wrong or missing altogether… pull clutch cover, clutch spring bolts and remove pressure plate, remove top hat & pull push rod out to start diagnostics… go online or get service manual for proper assembly schematics….
Its been a long time since I have had a yz 125 but I had a similar issue once. I think there may be a ball bearing that goes on end of rod or the rod has to be situated a certain way. I dont recall exactly but it definitely was that I assembled it wrong and ended up being an easy fix.
It’s just a puzzle… pieces need to be in the right places….when the pushrod is installed into the clutch hub, reach over to the actuation arm, the cable attaches to, pull on actuator to set the pushrod into the slot, you should then be able to move the actuator & feel the pushrod moving in/out. Make sure the ball bearing is inside the top hat, this is often the forgotten piece….
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Bringing this back to light as I'm now on to a whole other problem. As can see by the last picture, the clutch rods snaps as soon as the bike is started. When the bike is off, you can pull the clutch lever all day long. It has tension and actuator arm engages the clutch plates. As soon as it starts (or within 5 minutes of riding) the rod snaps.
The only thing out of ordinary is the shaft that runs through has play. Up and down and side to side. My guess is left side to right side of the bike 1/8" of play and up/down/left/right maybe slightly more than 1/8" of play. Also when turning that shaft, with clutch basket off, I can hear clicking like ball bearings hitting each other. Is there a bearing in the bottom end that could be shot causing that rod to snap? I've seen this issue all over the web but no clear resolution. It is a Wiseco basket and I tried brand new ProX plates today. First time it snapped the rod as soon as the bike turned over.
Yes it sounds like you have a bad bearing on the mainshaft. You need to split the cases to inspect. Oem bearings are best, but a less expensive route hot rods has tranny bearing kits.
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