JH600 stalling

[milton]

Finally got all the parts in and the bike upgraded and ready for road test on Saturday.
Did about 70km in 2 days, including a 20km stint on the mid-ring expressway. There has been no stalling at all. Not once. Also, it used to always stall 10 seconds after it's first fired up. Even that "start-up bug" is gone. Now the idling rpm stays very stable at 1700 under a great number of conditions in city riding.

Apart from solving the idling problem, the new ECU responds noticeably better to the throttle and the power has improved over all rpm ranges. It is a lot more fun to ride it than before. It used to hesitate and stumble at lower gears. Now it is reasonably smooth on all ranges, as good as a single cylinder engine can ever offer. The new 3.0 ECU works well with my "old 2.0 JH600", at least for now.

JH600A, the 2011 model with 3.0 ECU, comes with a new instrument panel. I did not replace mine, as Liu (刘志东) thinks that a simple mod with a resistor would make the old panel work with the new ECU. Now the overheating light would flash unexpectedly. We are still waiting for the recipe for the mod.

This is what I'd say about the upgrade:
1. My bike has over 20k on the clock. The performance of previous 2.0 ECU had deteriorated to the point of being nearly unridable. The new 3.0 ECU works quite well with the same set of existing or "old" ECU sensors. I can only attribute the improvement to the new 3.0 ECU program.
2. It is still not clear what Jialing would do to maintain the new ECU in the long run. The new ECU seems to tolerate the "aging" of sensors better, but the longer term stability is not guaranteed.
3. Being the brave sole for the first upgrade ever conducted in the land, I am getting a discount for the work with the final tab of 1350 rmb, including 200rmb labor. Xiao Fan did a great job. 刘志东 has been instrumental in getting the factory to respond and the discount. However, I am still upset for having to pay for the cost in fixing the factory/design defects. But TIC. I am just happy that it is fun again to hop on my JH600.

I'd also like to thank Eric for helping out before and during the upgrade.

Cheers!