39 vs 41
I'll tag along on the coattails of this thread, just bought a 39 PWK from John. Any suggestions on baseline jetting for sea level here in Michigan? Have a DGN needle, was thinking something in the 50 pilot range and maybe a 172 main. I have leaner in both directions, but nothing richer on the main
PC pipe, GSS trail porting, that's about it.
PC pipe, GSS trail porting, that's about it.
- iggys-amsoil
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- dannygraves
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dude, in %90 of cases a 50 pilot on a pwk is too rich. a mid 170's main should be good. sea level and its cold, maybe a 178 to keep it on the rich side.I would start w/ a 45 pilot
'09 kx450f 4-Poke
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
- dannygraves
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get a bag full from sudco. sooner or later you might need them allnmdesertrider wrote:It is running fantastic on the main jet but it is way too lean off idle- I guess I need to change the pilot jet. Should I get a bigger one or smaller one?
Should I try a 45?
dannygraves wrote:for 5000ft... well, start w/ like a 42 pilot and 170 main
- dannygraves
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adjust the airscrew on the pilot you are on now and depending and where it ends up, use that to determine which pilot you go with. if you have to crank it all the way in, or like only a half turn out, go ahead and skip 45 and try a 48.nmdesertrider wrote:It is running fantastic on the main jet but it is way too lean off idle- I guess I need to change the pilot jet. Should I get a bigger one or smaller one?
Should I try a 45?
dannygraves wrote:for 5000ft... well, start w/ like a 42 pilot and 170 main
my gen-4 ran a little on the rich side w/ a 48 and at boulder city (>3000ft) I had to pull the airscrew out to 3 turns out to stop it from blubbering down low.
where are you setting the airscrew? some people seem to be under the impression that these are supposed to be 2 1/2 turns out, but you should aim for 1 1/2 turns out being in the confort zone.
'09 kx450f 4-Poke
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
Gen-4 trail bike --SOLD--
Gen-3 badass trail/mx bike --SOLD--
Gen-1 built dunes bike --SOLD--
'05 klx110 --SOLD--
'95 pw80
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- Posts: 678
- Joined: February 22nd, 2008, 8:18 pm
- dannygraves
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Got my 39 from Sudco in, rode it at a friend's place yesterday.
It's kinda cool here, but my bike wouldn't even idle with a 45 in it. Tried a 52 and it's still on the lean side, stuck a 55 in there and it seems to be better. Still is a little soft from idle - 1/8 throttle, but it's liveable.
Overall it runs much, much better though, especially on the top end.
It's kinda cool here, but my bike wouldn't even idle with a 45 in it. Tried a 52 and it's still on the lean side, stuck a 55 in there and it seems to be better. Still is a little soft from idle - 1/8 throttle, but it's liveable.
Overall it runs much, much better though, especially on the top end.