12-05-2020, 10:08 AM | #1 |
Join Date: Nov 2020
Posts: 17
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tunable carb with stock airbox? Gen 2 Vader
Got my new Boom Vader BD125-10. It seems to have the tank venting problem, is hard to start in the very cold, and the handlebar 'choke' or fuel enricher thing does absolutely nothing. I will be digging in to do some of the common repairs, like cleaning up the vacuum lines, tightening and replacing bolts, and go from there..
Does anyone know of a more tunable carb that works with the stock airbox? I would like to keep the stock airbox and filter since it is protected from the weather and provides rigidity to the flimsy body panels. I also like the idea of the fuel petcock on the carb, and the choke cable at the handle bars. I'm not a fan of the air filter sitting behind the front tire soaking up water and mud; I would much rather open up the restrictions in the airbox and keep that box filter if possible. I haven't dug in yet, but I suspect the carb is a keihin PZ19 copy. Does that seem right? Are the aftermarket carbs fairly tunable? Has anyone found which size jets work to start? I know this carb seems a bit small, but I'm not really planning on changing the exhaust or going for max power... Last edited by GScott; 12-05-2020 at 11:54 AM. |
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12-05-2020, 10:36 PM | #2 | |
Join Date: Jan 2017
Location: Arizona
Posts: 463
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12-07-2020, 06:19 PM | #3 |
Join Date: Nov 2020
Posts: 17
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Yes. Thanks for that. I had same issue as yours. The check valve was hanging sideways and not working correctly. Once I got the plastic panels off I see lots of QC issues; Mismatched bolts. Missing screws. Wires and vacuum lines routed poorly. Chain is super tight. But I knew all that from reading about these bikes before I bought it.
The carb is marked Sheng Wey PZ20. I was gonna start by bumping up the idle, it was too low. But today it doesn't want to start at all. I knew I was buying a stack of parts. Now I get to do the set up! |
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12-09-2020, 06:34 PM | #4 | |
Join Date: Jan 2017
Location: Arizona
Posts: 463
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