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Ported stock jug jetting suggestions?
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Posted by: YFZRob

I just got a repalcement 88 jug ported by Neil (C-Leigh Raing) and a fresh bore to a 66.75mm piston. My jetting is currently SPOT on with my stock jug (based on plug chops and overall performance). Here's my current combo.....

stock 88 jug w/ 66.5mm piston
Keihin 38mm PWK A/S Carb
CR250 reed cage
ESR Cool Head w/ 23cc dome
FMF Fatty pipe
FMF turbine core 2 silencer
stock gearing, stock tires

Everything else is pretty much all OEM. I am at sea level here in FL, and my current jetting is:
168 main, 45 pilot, DDK needle on 3rd clip. It starts perfectly on 1st kick, idles perfectly, ect ect.

Now I am swapping out jugs for the ported one, which is ported for midrange power. Any suggestions on jetting changes??

I have about 10 different needles to play with, the only two that are richer than the DDK is a DGH and DDL. I am thinking that the 4th or 5th clip on the DDK will be sufficient, if not, the 3rd clip on the DDL should be more than enough.

I was going to jump up to a 48 pilot and 185 main. Any objections to these starting points???

thanks in advance!

Posted by: hondardr4life

I cant remember off the top of my head, but I think when tey jetted mine at Baldwins (very similar mods to yours) they put in a 185 main, DGH needle, and I believe a 52 pilot. I don't now if those are 100% right, but that is what i can remember.

Posted by: fireburns99

I have a similiar setup and run a 180 and 52 i think. Anywhere around there would be a good starting point.

Posted by: YFZRob

Okay, I'll go up to a 50 pilot, 4th clip on DDK, and a 182 main :-). Thanks for the suggestions guys!