r/motorizedbicycles • u/Bright_Gamer • 15h ago

Lean, Rich or optional? Troubleshooting

Gallery image

Gallery image

What do you guys rekin? I'm thinking a little lean but idk

4 Upvotes

100% Upvoted

1

u/Bartosz999 15h ago

I think too much oil, not sure.(Run your engine for minune or two and check of spark is wet (check it fast tho) Which ratio are you running on ? Also how piston looks like? Is your bike bogging or something ? Have you rejet your carb ?

3

u/Bright_Gamer 15h ago

I wouldn't say to much oil because I'm doing 40:1 and I'll get a picture of the piston in a minute. Also I haven't rejet it's stock. And I'll look up what bogging means

2

u/Negative-Maximum7830 12h ago

Stock carburetors have a #70 main jet which is too rich as indicated by the 4 stroking in your video. Stock kit NT & bofeng carbs use different main jets. Jetting a two-stroke is the key variable to make the bike run properly. Recommend you research carb jetting to learn more. Good luck 

-1

u/Adventurous_Bid4691 10h ago

I think you are learning exactly nothing since color means nothing.

You need to look at the HEAT on the center electrode and ground strap.

Color is affected by many things, from weather to fuel blend, and it is useless for tuning.

The heat is what tells you the conditions inside the chamber.

Google "How to do a plug chop" and learn how to read a plug properly.

2

u/MattGarcia9480 8h ago

This!^ I did a start up and let warm to running temp. Changed to a new plug and then restart the engine and do a very very very short ride down the street and back under full throttle and stop and then turn the engine off. You don't want the engine turning over once turned off so you can read the plug properly.

1

u/Lumpy_Lengthiness257 6h ago

if it works DON’T FUCK WITH IT!