pw50 Carb Problems -- any input appreciated

In an effort to improve my son's bike performance, I changed the needle clip
position to the first position(leanest). The result was that the bike is
now running very close to the proper fuel/air mix (the plug is a very, very
light black with a tannish tint) and I've got a 65 main on order (stock is a
70 main) which should take care of that last little bit. The bike runs like
a scalded dog now (well, at least for a pw) on the top end. My problem is
that now the bike is very difficult to start. It seems to bog out after
firing and until you can get it to crank and rev it for a couple minutes, it
will hardly run. Any ideas on how to fix this? I know I've created the
problem with my change, since it would crank easily before I tweeked the
carb. Short of undoing what I've done (since it dramatically improved mid
and top end), any way to fix the starting problem? Thanks.

PS..My son is going to make my life very difficult until I get this
fixed...I cost him a win last night because his bike died and it took us
about a full minute to get it cranked

Frustrated PW Dad

sounds like you may/will have to be doing something to the pilot air
circuit...

"h.E." <cfdlabs DeleteThis @yahoo.com> wrote in message
news:vfCdne134cO6X8DdRVn-tA@comcast.com...
 >
 > In an effort to improve my son's bike performance, I changed the needle
clip
 > position to the first position(leanest). The result was that the bike is
 > now running very close to the proper fuel/air mix (the plug is a very,
very
 > light black with a tannish tint) and I've got a 65 main on order (stock is
a
 > 70 main) which should take care of that last little bit. The bike runs
like
 > a scalded dog now (well, at least for a pw) on the top end. My problem is
 > that now the bike is very difficult to start. It seems to bog out after
 > firing and until you can get it to crank and rev it for a couple minutes,
it
 > will hardly run. Any ideas on how to fix this? I know I've created the
 > problem with my change, since it would crank easily before I tweeked the
 > carb. Short of undoing what I've done (since it dramatically improved mid
 > and top end), any way to fix the starting problem? Thanks.
 >
 > PS..My son is going to make my life very difficult until I get this
 > fixed...I cost him a win last night because his bike died and it took us
 > about a full minute to get it cranked
 >
 > Frustrated PW Dad
 >
 ><!-- ~MESSAGE_AFTER~ -->