Bogging at full throttle

Megaphone

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Joined
Jun 3, 2020
Messages
59
Tried different jets .. this is a YD100 .. when you hold the throttle open but only when it seems to be at max rpm, bike Will feel like it bogs theback then bogs ?

does anyone think the fuel bowl is setup wrong ? Like I’m not getting enough fuel ?

have tried this with jets 68-72
 


Wrench

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Joined
Nov 14, 2018
Messages
1,819
This might sound weird but too much fuel can Hickup bog at max rpm.
Try moving the clip on the carb needle up one notch
 

Don_Parsons

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Joined
May 6, 2020
Messages
1,134
Elevation,,, temp,,, fuel mix humidity...

Jet according to what your spark plug shows you 🙃
 

Wrench

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Joined
Nov 14, 2018
Messages
1,819
But at full throttle, the needle is completely out , so the jet and fuel bowl are the only things in play here .. no?
No the needle is not full out. The smallest part of the needle still dictates.
First I was thinking it was sluggish = rich. But you say it bogs = lean
I don't know whats wrong with your carb.
Good Luck
 
Joined
Jun 21, 2019
Messages
69
Sounds like youre 4-stroking, firing every fourth stroke instead of every 2nd. Buy some jets, theyre pretty cheap. I think whats in the stock carb is a 70, or so i remember someone telling me, a 66 runs great in most cases on stock engines. Get multiple sizes, not just a 66, depending on your elevation that may not be what you need. I have a 63 in mine, debating if i need to change it or not, still testing, juat put it in yesterday, and it solved my 4-stroking issue, (yep, same issue) but im worried if its goin to get to hot. Ill revaluate that after a few rides.

Edit: i also want to mention i dont have a stock engine, upgraded carb and expansion chamber muffler, an a 32t sprocket. Debating switching back to my 36t, or buying a 34, slows too much on hills for my liking. Got a pullstarter otw in the mail, and plans to buy a better head in a few weeks.Thus leading to my decision to try the 63.
 
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