trialsrfun Posted November 8, 2005 Report Share Posted November 8, 2005 When pulling in the clutch lever on our TY 175 there is a resistance as if something is worn, possibly in the vertical arm or pushrod area. Once the mechanism has passed this resistance the clutch then operates quite normally. Has anyone any ideas as to the cause of the problem and what might need to be done to cure it. Quote Link to comment Share on other sites More sharing options...
kevin j Posted November 8, 2005 Report Share Posted November 8, 2005 First the normal cleaning and lube of the linkage area. Then look at the cable. I have a TY250 that had a brutal clutch. Assorted cable lubes made no difference. Cable looked really good, the bike is decades onld but low hours. Disconnected, the cable moved really smooth. Changing to another cable solved the problem. Apparently some spots inside the cable cause friction to the housing when under tension and side load, but when moving by hand it felt smooth. Borrow one from somewhere else and see if it changes. Quote Link to comment Share on other sites More sharing options...
trialsrfun Posted November 14, 2005 Author Report Share Posted November 14, 2005 I also thought it was the cable so fitted a new nylon lined one but the problem remains, when the clutch is pulled in the small lever on top of the engine releases with a jerk or snatch as though there is something sticking within the mechanism. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted November 17, 2005 Report Share Posted November 17, 2005 Things to check: 1 The vertical rotating shaft tends to develop a rounded pit where the end of the pushrod bears on it. This increases the surface area in contact with the end of the rod which increases the friction. It can be restored by welding and refinishing or they are available from Yamaha. Make sure that the point where the pushrod bears on the flat surface of the vertical rotating shaft is well lubricated with a grease containing a high pressure additive such as molybdenum disulphide to resist galling. 2 The action of the TY175 clutch mechanism is affected when the flat face of the rotating shaft that pushes on the pushrod is not at 90 degrees to the pushrod in the middle of its movement. If yours is not at 90 degrees, you will need to make changes to the clutch components to get it there to optimise the action. Things that affect this angle are: Incorrect adjustment of the rotating shaft height, clutch plate wear, pitting of the flat surface of the rotating shaft, wear of the end of the pushrod and wear of the ball. If the angle is significantly less or more than 90 degrees, the end of the pushrod will be getting pushed sideways which will greatly increase friction and wear in the mechanism. Quote Link to comment Share on other sites More sharing options...
trialsrfun Posted December 4, 2005 Author Report Share Posted December 4, 2005 Thank you all for your help, work has kept me away from the garage recently but I will check all the items suggested. Quote Link to comment Share on other sites More sharing options...
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