Re: 505/1A Running well now, seeking advice on increasing torque.

Drake Abrahamsson /
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> After putting the air filter on the bike is actually running better than

> ever since it’s been in my possession and probably about twice as fast

> uphill as it was without the filter. I’d imagine it was getting way too

> much air without it, not sure if I should still experiment with the jet

> or not. Just to be clear I’d have to buy a whole nother jet, bigger /

> smaller and put it in the carb and just experiment? Re-jetting is not

> something where you can just adjust the existing jet right??

That’s awesome! I guess it corrected (chances are slim that it got the air/fuel ratio absolutely perfect) the ratio! And yes, jets are very delicate and the adjustments needed between sizes are way too small to do by hand. Therefore, you’ll need to buy some. You’ve got a square bing so you’ll need these https://www.treatland.tv/original-OEM-square-bing-jets-p/square-bing-jet.htm

Find out what jet you have by taking apart your carb and unscrewing the jet (without scratching it!). There should be a number on the side. Before you buy any, you’ll need to perform plug chops (https://www.mopedarmy.com/wiki/Plug_chop). Once you determine whether your current jet is giving you too rich or too lean of a ratio, you can buy the appropriate jets. I’d buy a range of 5-10 depending on how far off your chop shows you are. This is really important to get correct and if you do it will lower the overall maintenance needed on your bike.

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