bad bog with 79 exciter 440

[3g racing]

I've got an 79 440 exciter that I've been restorin and finally got it goin and noticed it has a very bag bog for about 3 to 5 sec. when u WOT it then it clears up and runs awesome just wondered if there is a fix or is that just how they were I've had a few of these and never noticed the bogs on the others any help would be appreciated thnks

 

[YAMMIEGOD3:16]

BAD BELT OR CARBERATION. 3:16 (yammie tony)

 

[3g racing]

belt is new and carb has just been cleaned and has fresh gas in it too thanks tho

 

[mrviper700]

from a dead stop it likely needs to be richer mixture to get out of the hole on dirt or grass, install a larger pilot jet and readjust the fuel screw.

 

[RON HYDRAULIC YAM]

any slobber at exhaust ? maybe over fueled when throttled back
to an idle ....possible external primer added and drawing fuel it
can't use up till revved up ?? Pull plugs out and when giving the problem and see if damp or burnt clean..
Ron

 

[Shrader]

most likely a clutch issue. The clutch on that sled worked very good when new, but wore out regularly, find new parts, or put a comet on it, if it has a comet, what is the engagement rpm?