Carb mixture

[moth]

Hi Guy's

need some advise on carb set up, i have searched but my question relates to mixture. i couldn't find the answer i was looking for so here i am..

not sure what carb i have yet, but i have a r4 gtl year is 1988 and its left hand drive.
the paperwork i have say's its 1108cc

my question is: I found this answer in the similar posts below, my bad did not no they were there.
does the mixture screwing in (clockwise) richen or weaken the mixture. as i want to see if i can lean it off a bit at a time to get the bet out of her.

when i received the car it was revving around 2000 rpm at a guess and the idle screw was at its minimum, the mixture was 3.5 turns out, so have set that to 1.5 turn out. the result is a better idle speed.

also i have set the timing up atm to centre as suggested for running leaded fuel. please correct me if thats wrong.
it was a game of cat and mouse adjusting the distributor and idle to line it up, but after a trip the the courier up some good hills i heard no pinking.

from what i've read i need to clean and check the ignition system too.

thanks very much in advance for ideas and suggestions, and sorry for this long post.

 

[moth]

1 more thing, it does rev on a little before dropping down to idle. is that normal for the r4?

 

[DaveP]

It could be as simple as the linkages for the throttle and/or choke needing a clean and lube, my choke occasionally sticks a little and a drop or two of bicycle chain lube sorts it. Try pushing the throttle linkage to see if it's closing properly.

 

[Threelabs]

Hi Moth, just reading your post and saw you live in Portugal, I live down on the Eastern Algarve near Tavira. Sorry I cannot help you with your problem at the moment as I only picked up my 4 GTL yesterday, but give me a few days to get my head around it and I will try and help. If you PM me and we might be able to get together and help each other out.
Regards Threelabs

 

[moth]

Hi Guys. not been on here for a while. it turned out my main problem was the carb was warped on the base where it sits on the gasket. after filing it flat it runs a lot better.

the issue i now have is a slight fuel leak on the throttle shaft that goes through the carb.

apart from that all is ok.