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Post by blacky on Jun 22, 2020 13:56:52 GMT -5
Hello,
I've bought a new air filter for my Yamaha Jog with a Yamaha Aerox engine. Its a pod filter, it wasn't able to run as it was too much air for it so I had to improvise. I took my broken stock filter and took out the actual filter and stuffed it in the pod filter, runs fine. Upgraded to a minareli exhaust, much better torque, but when I'm at 60-65km/h it feels as it goes back and fourth like its struggling or something. Do I need a bigger main jet to fix this issue?
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Post by mrchilled85 on Jun 22, 2020 17:51:52 GMT -5
sounds like jetting maybe off
pod filters let so much more air in over the panel filter still
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Post by Zino on Jun 22, 2020 20:14:30 GMT -5
Mr chill is right See this poll 49ccscoot.proboards.com/thread/26558/stock-air-open-filter-discussionWhat does your current Plug Look like ? I would do a wide open plug chop . Pick a area you can go wide open for a mile . Warm it up with your current plug . Jump on it blast down the road Full Blast . Run at least a mile at that speed . With the throttle wide open hit the kill switch coast to stop . Swap plugs back to your old plug. Take the wide open plug to your work shop and hack saw the threads off . We want a 2 mm (size of a # 2 pencil lead )light smoke ring at the base of the plug. If no ring you are way under jetted . |
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Post by Zino on Jun 22, 2020 20:16:35 GMT -5
Open filters often require 15%-25% bigger jetting. Here is a good picture to reference for your plug.  |
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Post by matlock on Jun 22, 2020 22:35:46 GMT -5
i like it all very true zino
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Post by blacky on Jun 23, 2020 4:12:12 GMT -5
Thank you all, would a 100-122 delloroto main jet kit would do the job?
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Post by Zino on Jun 23, 2020 6:24:03 GMT -5
Thank you all, would a 100-122 delloroto main jet kit would do the job? If that reaches up into that range . When you do the plug chop and post up a picture . If you have some color you are under 10% on jetting no color you are over 10% Lean will sound higher pitched and Zingy Rich will sound deep Bwah |
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Post by matlock on Jun 23, 2020 9:56:10 GMT -5
typical 70cc jetting is between 85 and 95
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Post by blacky on Jun 25, 2020 13:52:01 GMT -5
It didn't even start with 120-128 kit
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Post by repherence2 on Jun 25, 2020 20:14:52 GMT -5
It didn't even start with 120-128 kit That range of jet sizes (120-128) is what i ran on my filterless 28mm OKO carb with CT intake manifold on a 94cc minarelli with oil injection. If i was to run premix the jetting would have to be larger. |
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Post by Mech Warrior on Jul 14, 2020 1:56:59 GMT -5
No 100-122 is way too large!. You should be around 95 main jet if you have a performance pipe and big bore kit. If you are running a stock 50cc and stock exhaust you should be more near a 75 MJ size.
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