i just installed delta valve on 99 shee and having little trouble getting jetting right was running 290 mains had perfect plug color paper sac brown before now ive jetted up to 320s but bike still appears to run lean on plugs feels great but plugs not right yet has anyone else had to this high or higher to get good reading on plugs alsorunning just above sea leavel running fatty pipes milled head toomey two into one filter toomey jet kit reed spacers delta valve and couple secrets gotta have those!!!!!!

 

Make sure your gaskets are sealing and there are no other air leaks.

 

I just installed the delta's myself and am going to try 270's. I was going to run 290's but since I finally got everything back together and running it smokes alot on 280's. I haven't done a plug check yet, will have to wait for saturday. I have been running 50:1 yamalubeR with 110 octane from sunoco. What ratio are you running with what gas?

 

i got to work on bike today took deltas out reinstalled with new gaskets and torque down bolts pretty good must have been leaking air some because now plugs way rich.going to drop back to 300s give it a shot.running honda gn2 at 32-1 and 93 octane.thanks for help think im on right track now.

 

millhouse let me know how things turn out hope ya like deltas kinda priceeeeeeeee!!!!!!!

 

Vision, those are pricey.. I wanted to confirm a step on the installation with you.. When you put the washer between the manifold and the stock reeds and cut those tabs off the manifold if you still had a little bit of the tab left? That is was the cut you made flush to the mounting face of the manifold or was there a little tab left? I had a little bit left..

 

it would have been but i took razor knife and trimmed it all the way flush.i just wanted to make sure i had a good fit.and also i wasn't to thrilled about having to cut it in the first place. the deltas did help my bike a bunch in the mid and some on top.good luck with your bike.