Riva 125 -fix a Choke/ Bystarter for $6. Part 1

Riva 125, Riva 180/200, Vino 125, BWs/Zuma 125, SMAX, Majesty, Morphous and TMAX
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drtch1
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Riva 125 -fix a Choke/ Bystarter for $6. Part 1

Post by drtch1 » Fri Feb 21, 2014 12:38 pm

I didn't want to pay $189 for a new choke/ bystarter. So I made my own for $6 (bought a bystarter off eBay for a Chinese Bystarter for a 150cc GY6). Here is the pic's how. SAVE MONEY.
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mchillin
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Re: Riva 125 -fix a Choke/ Bystarter for $6. Part 1

Post by mchillin » Wed Sep 04, 2019 2:37 pm

Just ordered the Bystarter for $5... will see how it goes!

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Re: Riva 125 -fix a Choke/ Bystarter for $6. Part 1

Post by mchillin » Mon Sep 16, 2019 12:33 pm

Great guide... worked perfectly!

I was a little confused about it, but once I got into it, came together easily.

One note of caution in regards to testing your bystarter that maybe I should have been obvious but it wasn't to me.... testing while removed from the bike ( I connected directly to the battery) I did not realize how slow it moves, mostly because I didn't understand how it worked, but initially I thought the new part I ordered was bad because I was expecting something to move quickly... it takes minuets to move a 1/2" or so because it's based on heat and expansion...

But the fix itself is amazingly inexpensive and not hard to do... great write up!!

Thanks drtch1!

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Re: Riva 125 -fix a Choke/ Bystarter for $6. Part 1

Post by flybd5_juan » Tue Sep 17, 2019 3:11 am

Yes, the action is slow because the bystarter (or actually electric choke) has wax inside. the pin is spring loaded. when the wax is cold it is as if the choke is opened. As the wax warms, the pin retracts and the choke is closed for normal operation. If the bike is warm the choke closes more rapidly. I dont particularly like this system, i prefer a manual choke, but it works.
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