[How-To] Ungovern HuaSheng 142f

dmopedMA

Active Member
Joined
Apr 14, 2017
Messages
171
I'm working on ungoverning my HS 142f and since I haven't seen any "how-to" post which I'll find useful, here is mine, for now "work in progress". I'll keep updating this first post as I can invest hours on this.

Special tools needed:
- Balancer Puller (to pull the flywheel, learned kind of the hard way...) (Looks like you can borrow it from AutoZone) (https://www.amazon.com/gp/product/B01LZLUJJP/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1)

Pieces needed (thanks to Jakeguy24 on this post https://motoredbikes.com/threads/huasheng-142f-to-144f-upgrade-questions.53246/page-2 ):
- Honda or old HuaSheng FlyWheel (Honda part number is flywheel is 31110-ZM7-004) (got from ebay ~$20)
- Honda or old HuaSheng CDI (Honda part number for the Honda CDI is 30500-ZM7-014) (got from ebay ~$10)

Steps:
IMG_20190428_134701.jpg


- Remove plastic cover

IMG_20190428_135031.jpg


- Remove CDI

IMG_20190428_135233.jpg


Comparative between CDis, top one is the new one

IMG_20190428_135225.jpg


- Remove the nut and the metal part of the rope puller

IMG_20190428_135707.jpg


- Checking the differences, as expected, some degrees difference on the shaft hole between flywheels:

IMG_20190428_135754.jpg


- Trying to pull the Flywheel with a "home made" puller (Spoiler alert: went wrong)

IMG_20190428_141309.jpg


End of part 1, I'm now waiting for the puller to be delivered and then I'll keep updating.

EDIT 1 (May 1): I was able to pull out the Flywheel with the puller:

IMG_20190501_083410.jpg


EDIT 2 (May 3):
- Motor is assembled back:
MVIMG_20190503_174348.jpg

*** Gap between flywheel and CDI it's a little bit to big, the closer the better, even that it worked just fine like this, I ended up moving the CDI closer to the magnet

IMG_20190503_174343.jpg

IMG_20190503_174625.jpg


When I pull the rope, the rpms go up on the tach meter, so ready for a real world test outside, probably tomorrow.

UPDATE 3 (May 5):
I tested it yesterday and it worked, I had to re-adjust the mix screw, but after few tries it was up and running and it reaches 9k rpm with no load (back wheel on the air).

Feel free to add comments to improve this How-To and I'll take care of adding them to the right step here on the first post.



Thanks to all the great people in this forum that helped me accomplishing this and special thanks to CrazyDan
 
Last edited:


CrazyDan

Well-Known Member
Joined
Jul 9, 2016
Messages
2,423
Hell yeah bro!!! Make sure you keep your valves tightened to spec, that affects max rpm big time if you let it get out of tolerance.
 

darwin

Well-Known Member
Joined
May 26, 2008
Messages
3,350
In the pic of final assembly before cover goes on, the gap between the cdi p/u coil end and the flywheel magnet looks huge. I;m used to using a piece of paper [thick] to space it out. Was always told the closer you can get it the better spark you'll have.
 

dmopedMA

Active Member
Joined
Apr 14, 2017
Messages
171
In the pic of final assembly before cover goes on, the gap between the cdi p/u coil end and the flywheel magnet looks huge. I;m used to using a piece of paper [thick] to space it out. Was always told the closer you can get it the better spark you'll have.
Absolutely right, I had to move it when testing, it's just that I have to get the time to update the first post.
 
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