Following on from Knob's good work on the issue, I have ordered one of these 12tooth shift motors which he referenced in reply 4. I already have the 11tooth shift motor that he compared to the OE motor in the 1st post. You will see that the gear shaft OD is 8.8mm. Knobs pic shows 8.7mm. What else is similar or different remains to be seen when I have the motor in hand and compare it to the
other cheap 11T motor. I'll post my findings in a few weeks to see if I can make 1 good one from 2.
My friend ran into the problem of premature death (about 29000 km if I recall) of the HFT control electric motor, so we had a choice to test the idea of mixing two cheaper chinese made ATV transmission control motors. Few words about results we got:
- mixing motors is mechanically possible, just remember to use the part with ball bearing, oil gasket and brushes from OEM el-motor. And a rotor (with 12 teeth) and a part with magnets from a new ATV el-motor.
- after mixing motors I measured idle current both the mixed and new OEM motor. The mixed motor's idle current was about 10% less than the new OEM motor has. Looking promising.
- after installing the mixed motor on bike it first started to work as supposed. It did not blow the fuse HFT MOTOR 30A. But we got intermittently error message from TCM: ERROR 26 Swash plate control motor lock.
We checked the mixed motor and no mechanical locking was detected, it turned freely. After some thinking we decided the error 26 point like the control el-motor is consuming too much current, the current sensing circuit in TCM is a bit too sensitive. Well, it did not blow the above mentioned 30A fuse, so no real trouble state appeared.
Conclusion is the TCM el-motor current sensing is a bit too sensitive for the mixed el-motor to operate. The difference is not very big because half the time bike worked normally with mixed el-motor. And it may vary from bike to bike, on some bikes it may not give the overcurrent error 26. The mixed el-motor itself worked fine, we checked it also with mechanical load on the bench. It just obviously was consuming a bit more current under load conditions than OEM el-motor and that was the culprit for error 26 coming up time to time. After resetting this error bike ran normally for some time. I say again: this situation may vary from bike to bike as there are some tolerances in TCM's circuit measuring el-motor current, the mixed motor may work fine on some bikes.
- so after all we had to install a new OEM control motor on this particular bike. End of story.
P.S. Also the expencive Honda OEM transmission control electric motor looks like produced in China.