Converting bystarter to manual choke

[japennell]

Hello. I am investigating converting my 01 Kymco Cobra carb to a manual choke and removing the bystarter all together.

Has anyone successfully performed a similar conversion on either a Kymco or Honda? I am interested in getting a better understanding of the impact of such a move so I can determine if this is doable for me.

It is my understanding that:

1. when the engine is cold and therefore the autobystarter spring/needle is retracted it lets more gas into a little chamber which richens the mixture.

2. when the engine warms up and the autobystarter spring/needle extends it seals up the hole where the extra gas was coming from, thus leaning out the mixture.

So the autobystarter serves the same purpose as a choke, but it does so not by letting in air, but by letting in extra gas.

Thanks

[mousewheels]

So the autobystarter serves the same purpose as a choke, but it does so not by letting in air, but by letting in extra gas.

It's a triple function device, It's admirable what Honda got out of this design.

• Bitty bystarter fuel well cast into the carb provides a prime
• The bystarter valve needle when retracted flows extra fuel
• Bystarter brass collar is a slide valve which controls an air passage *around* the throttle slide

-- Back to the manual modification --
Manual modification should have both the needle and air valve collar.

Couple years back noiseguy found the dellortocarb has a flip lever where the bystarter normally goes. That part as a replacement may fit your Kymco, and was priced at about $12. Full Thread

[Bear45-70]

https://www.1977mopeds.com/product/1535 ... Choke-Kit/

PHVA Flip Choke Kit

SKU# 1535
Moped Brand: Universal
Top of Form 3
´┐╝
Price: ´┐╝$14.99
Availability: In Stock
To order call 800.965.1977.
Most items ship within a few days.

´┐╝

[ute]

So Bear this will fit a Spree ?

thanks

[maddog]

once again the "bear" is completely useless

[jlynn433]

Maddog is a * troll. Completely helpless and shouldn't be on this forum at all. Just there to * people off

[Bear45-70]

Once again Bear has been out scooter picking and just got home. Yes, it will fit all the 50 cc scooters with either a PA or PB carb.

[ute]

Thanks

[GoodJuan]

Has anyone actually installed this and found it to be a viable alternative to a bystarter?

[Bear45-70]

Has anyone actually installed this and found it to be a viable alternative to a bystarter?

It is just a manually controlled valve instead of and electrically controlled one. The OKO carbs all use a manual bystarter.

[Saxonthebeach]

I have one on order, since my by-starter died, and this is the cheaper, and easier alternative, especially since my Spree doesn't have the side panels. I'll update when I get it installed.