So i fixed my leaky petcock and while i had it apart i decided to shim needles and put in bigger mains, the previous owner had 118 dj in there which was smaller then mikuni 112.5. I had a spare carb bank lying around with 112.5 in them so i changed them over, will prob go to 115 later on.
Wow what a difference no flat spot at 4000rpm and smooth all the way to the red, even managed to brake the rear tyre loose whilst hitting around 6000 rpm which was a bit surprising.
According to this chart, The jets you put in are pretty much stock.
http://www.fjowners.com/index.php?action=dlattach;topic=47.0;attach=44 (http://www.fjowners.com/index.php?action=dlattach;topic=47.0;attach=44)
All US, 1984 through 1987 UK 112.5
1988 and later UK 110
Yeah the mains are, but the point was that the P.O had smaller ones in there and i now i have shimmed needles to 3.5 and pilot jet has always been 40. The change has definitely been felt, sounds better and goes better lovin it. I reckon it needs a 115 main but this will do for now as everything i did cost me nothing.
I'm sure I need bigger jets. I have uni-pods and mod. exhaust. I'll get some 115 too. I might need 117.5. Good that your bike is running better. :good2:
Yeah at the moment for my 84 1100 stock engine internals with 4-1 exhaust and pods ive got 40 pilot with 3.5 turns out on screws, needles at 3.5 notches and 112.5 mains and this thing is running sweet. Im sure i can get more out of it but it will only be minor from now on.
Those carbs have to be super clean and i also run a inline filter, but even with that i still get crap in the float bowl down the bottom after about 1500km, which i just cleaned out. Its not much but still better to be clean.