First my set up...hc pistons barons bak 167.5/4th with shim pms@2 3/4-3,dyna3000 @28b.big willeys with 1 3/4 baffles. Ported manifold(barons)
Now the problem. Put the bike on a dyno recently and the afr was really rich on the main. Around 12:1 right off the needle and rose to about 13:1 by the time it cut out. It seems to run rich on the pms but it has to be or it runs like crap.and i did try the 165 mj but it was to lean. My question is, could the more restrictive baffles be causing it to run that much richer? Like a dumb#@% i tossed the stock baffes when i changed them. It seems like it's run rich since the install of the pistons. I'd like an opinion before i go and pay for the less restrictive baffles. thanks. ed
Oh yeah, its an 03.
Post edited by: hilled, at: 2004/10/05 01:12<br><br>Post edited by: hilled, at: 2004/10/05 01:21

I can't help much but give my own experience.

With the Barons Nasties and no baffles, I was at 170, #40 idle, 4.5 on the clip.

With the Barons baffles (10&quot; straight pipe with perforations), no change except adjustment of the PMS.

With 12&quot; baffles that have an internal restriction (difficult to explain but you can see them at http://members.rogers.com/docshadow/Nasty_Baffles.htm ) I went to 170, #35 idle, and 4 on the clip. It still runs slightly rich so I'm going to try the 167.5.

Doc