Carby Do I need a smaller carb jet or larger one?

[jhendrix]

bike is 4 stroking at the top end so i need to switch the jet up. Its my first time doing this so I took some pics of my plug right after I ran it and would appreciate some more experienced insight. Thanks

 

[Anton]

Four stroking... I have the same problem on my older engine. You may find these threads of use:

This one talks about needle settings and how no two engines run alike.
http://www.motoredbikes.com/showthread.php?34909-Four-Stroking-possible-fix!-amp-question

...and this one is only from a couple months back
http://www.motoredbikes.com/showthread.php?38909-4-stroking-on-my-2-stroke

If you do a search on 4 stroking you will come across many more threads

 

[crassius]

you didn't say how many miles are on it - if less than 200 miles, don't worry about it till it's run in a bit more