So I have both the Haynes manual and downloaded the workshop pdf but yet here I am still asking the question!

I do not want to follow the haynes manual procedure but rather set all four screws to the same standard setting, but what is it?

How many turns out for a UK CBR F4 standard filter & exhaust?

I've read people say 3 to 4 then others say 3/4 which to me means three quarters ie 270 degrees.

 

According to this its 2 & 1/4 ie 450 degrees

pilot screws(accuracy of adjustment)

 

Start there as a starting point then after you ride it for a day, pull plugs and check em to see if its set right. White plugs= not enough fuel, blackish, sooty color=too much fuel, paper bag brownish tan color=good. Or put it on a dyno to see if its got the right fuel to air mixture.

 

Well she is running ok with that base setting now. I purchased a sealey tool to try and adjust them while the bike is running but they are a nightmare to access and the tool doesn't help at all :-/

http://www.ebay.co.uk/itm/Sealey-Pil...item3f18f2cb60

 

if its running good and ya don't really feel like pulling the plugs to make sure it the exact right mixture, you can keep an eye out on fuel mileage too. When mine is tuned up good I get around 150-170 miles per tank. That's city and highway under normal use. And when I'm racing around It can be as low as 135 per tank. I get use to the mileage and when its off a lot I know something something needs attention and tuning.

 

Even when warmed up the throttle response hesitates from tick over (momentarily bogs down) so the pilot jets do need tweaked from this base setting.
I have been looking for a better tool to help me with this and stumbled across the following on eBay although it is of the "D" shaped variety where my pilot screws have a normal X head.

Genuine Honda Pilot Screw Wrench WorkShop Service Tool New P/No. 07KWA-MS6-0102 | eBay

 

Just an update: I did a complete carb clean and sync. I cleaned all the jets, needle slides, and took out and cleaned the idle/ air screws, plus new spark plugs. . Then I synced them with osculating gauge type syncronizing tool. I screwed in the idle/ air screw until it snugged up very lightly. I mean very lightly. As soon as you feel it snug the slightest bit, that's when you stop. I could also hear the little idle/air screw spring make a binding noise from getting tight. That's the absolute tightest it can go without damage from over tightening. Then from there I backed it out 3/4 of a turn. It took a center punch tool and and made a mark on the screw head and a mark on the carb to line it up as a reference point. It idles and runs smooth as silk now, its perfect. I followed the manual for the most part.

 

Hi cBrentb,

I would like to ask u how is your bike running after last carb sync. I've been reading your post about the backing 3/4 of a turn after full tightening the idle/air screw and I was wondering about that.
I have cleaned by carbs and I did a lot of more stuff ( my bike has been sitting for two years) and while tightening the idle/air screws, I have counted 3 turns in three carbs, and 3 and a half turn on the fourth. Is this right? The difference between carbs?
And on the other side the difference between the 3 turns I got and the 3/4 (less than a turn) you're talking about.
I also have changed spark plugs and only one was black ( wasn't the one of the 3 and a half turns)
Do you also suggest me to take off carbs again to work on the turns or do you think I can do it with them on?

Thanks in advance,
Lisandro

 

Clean the carbs again completely. Take the idle/ air screws all the way out and clean them off good and put em back in. Follow the shop manual on how to adjust. Snug the screws down and back out 3/4 of a turn. All four should be screwed out exactly the same. start there, then ride the bike for a day then, pull plugs and they should be a (paper bag) tanish color. That's what worked on my bike. Not all bikes are exactly the same. Sometimes Its a process..to get the fuel/ air ratio exactly right. So, I would say start there, then pull plugs and check. Then get back with me if you need more help.

 

I have this tool - Morgan Carbtune - carburetor synchronizer for balancing motorcycle carbs

Best carb screwdriver I have ever used - Far better than the honda tool