KwakNut wrote on 04/09/08 at 00:26:08:Reelthing wrote on 04/08/08 at 17:15:45:EPA changes - the mid 80's carbs are a good bit different - needle and several jets - they were not lean like the '95+ bikes
It seems the 90's bikes were put together a little differently for the European market. The jets on my '95 didn't seem to have any witness marks in the screwdriver slots which usually suggest home tinkering, so what I found in there was probably standard for UK (and I guess other European) regulations. It had a 55 main and 47.5 pilot, the needle was set to the middle of three grooves but there was no spacer - that must have been removed by a previous owner (I'm the 8th and it's only covered 8000 miles!!).
Despite having the richer jet and adjustable needle, it still had a blanking plug over the idle mixture screw.
As our emission regulations were a lot more lax then, and the rest of the bike's engine specs are identical from the 80s to present, it has suggest that Suzuki think you need a 55 main even in a totally standard bike.
Hope you mean 155 mainjet
in the mikuni spec sheets - it looks like the taper or rather the length before the taper begins was different as well pre-95 US -
4 different needles seem to have been used in the bs40 on the savage:
5c16 3 slots L 56.90mm D1 3.0mm K1 15.7mm
5c17 1 slots L 56.90mm D1 3.0mm K1 15.7mm
5c39 1 slots L 56.90mm D1 3.0mm K1 15.5mm
5c40 3 slots L 56.90mm D1 3.0mm K1 15.5mm
If you folks with a 3 slot needle get a chance could you examine the
needle and see which is stamped on it 5C16 or 5C40
if you look it over be sure it's a mikuni needle - should have their
mark on it right before the type stamp - their mark is a square with
a smaller square in it's corner - also a good way to tell if you have
a real mikuni jet or some knock off stuff that may or may not be the
size it claims