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Post by redfab75 on Nov 4, 2020 10:11:10 GMT -5
There are so many different threads on the same exact things in reference to jetting and tuning. I am going to be honest here in the hopes I find a magical fix!🤣 Can anyone tell me jet numbers for a 50cc two stroke carb with a pod filter. I have pilot and main jets to throw at it. I just need some numbers that have worked for other scoots! I have a genuine buddy 50cc gy6 style platform. The only thing I added was a pod filter for now. I know there may be opinions on what I did wrong with not adding exhaust in addition to the filter...I get it! I just want jet numbers please! Thank you all in advance from a scooter newbie!
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Post by aeroxbud on Nov 4, 2020 10:23:23 GMT -5
It will never run as good as with the air box.  No two scooters will ever be exactly the same when it comes to jetting. Temperature, elevation, humidity can all effect it. That's before modifying it. Is it stock apart from the filter? Even pod filters can vary in how much air they let through. Start off with a jet much bigger than you think you need, and work downward is the only sure way. |
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Post by redfab75 on Nov 4, 2020 10:32:31 GMT -5
It is very stock apart from the pod filter. I kept all the stock stuff so that is an option. I also completely agree with the fact that there are an insane amount of variables between scooters including where you live. I was just wondering if anyone had an idea of where to start maybe. Stock jet was a #78. I went to a 96 and it still bogged terribly while trying to ride it at about 1/2 throttle. I live in central Texas if that is if any help. I am at 509’ or 155m in elevation.
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Post by aeroxbud on Nov 4, 2020 12:12:15 GMT -5
Try working down a couple of sizes and see if it's any better.
What do you hope to gain from running a pod filter? Except worse fuel economy.
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Post by redfab75 on Nov 4, 2020 13:23:56 GMT -5
Honestly not worried about fuel mileage as the primary function for this bike is transportation while at the racetrack. That and it sounds outstanding. I just want to make sure I don’t melt the motor by improper jetting. I would also like consistency across the throttle range!
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Post by FrankenMech on Nov 4, 2020 21:05:27 GMT -5
The carb must be modified to run a pod filter properly. The bowl vent must be routed to the intake side of the carb properly. When that is done a pod filter will run much better than a stock airbox restricting airflow. The pod filter must be set up to keep water out of the carb. The stock airbox and carb setup is horrible except for keeping water out.
BTW- Jet numbers vary between manufacturers. A XX# jet may flow different amounts even among jets from the same manufacturer. The OEM carb builders use a flow bench to test carb flow under specific conditions and select jets based on lot numbers to get the best results. Even microscopic changes in a jet flow path can change flow dramatically.
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