Transmission slipping on a1986 yfm225

[karms88]

We replaced clutch plates, friction plates, primary and secondary clutches or centrifugal clutch. Has 4 stroke oil in it . We were told pressure plate or the four springs on the secondary clutch. What happens is once you go about 50 yards the trani starts to slip. 

[Mech]

Is the clutch adjusted correctly ?

[dano626]

Youtube clutch adjustment for that model. Couple videos there with different bikes but same procedure.

[MarkinAR]

"4 stroke oil" doesn't mean anything.  The better question is if the oil is wet clutch approved, JASO or better.  Conventional non JASO oil will slip the clutches like crazy.  If it's JASO oil, then as mentioned above, it's likely a clutch adjustment issue.  or the Primary drum or shoes are shot.

[Mech]

The oil won't start causing a problem after fifty yards.  It's either not adjusted correctly, or there is some problem that was overlooked when they were overhauling the clutches.

The clutch springs might be buggered, the clutch basket might have notches where the plates rub, or the centrifugal clutch drum might be worn out.

It's got a lot of new parts, it will probably be something with the workmanship...  Better take it apart and have another look I think.

 

[Mech]

Another thought.. When you have it apart, check the gearchange is centering itself properly, and that the mechanism between the shifter and the clutch is operating correctly and isn't too worn.