this weekend i'm going to go through my carbs and clean them up. i have two different sets and looking for advice on which to use. the first is the stock carbs for the 87-89 model vg20a, the second is for the 1990 model vg26f. the later has an increased throttle valve diameter of .5mm. will this give me any performance gain? i'm leaning toward the vg26f since i live at 6600 ft and need all the air i can get. someone replaced the main jets from a the stock 110 to 112, should i go back to stock since my elevation? i have a new stock airfilter, and will be using a yoshi header and silencer.

also, i will probably need to have my carbs sync'd eventualy. i have a carb airflow meter that i've used to sync dual two barrel carbs on my volkswagen. it goes over the intake, and measures airflow through the carb. will this be as good as measuring at the vacume ports? here is a pic of the tool i have.


i have made been making some progress on the bike. last week i got the wheels and suspension on. i also went through the wiring harness since it was rolled in electrical tape and found and fixed about 6 chaffed wires. my main goal is to have this bike running by the end of the summer. i think i will make it since i have almost a month left. here is how she sits now.

 

Damn. you keep doing this right and that gonna be one sweet ride

 

I would go with the carbs from the '90 model. I had a '90 once upon a time. Supposedly they had 10 more HP from the factory than the previous years, due to the different carbs and a different cam profile.

BTW, I have a brand new, unused, still shrink wrapped UNI foam air filter that would drop in very nicely in place of the stock filter. Can can be cleaned and reused over and over, so you don't have to buy an OEM one ever again. Cheap too = $10.00

-Mike

 

cool, i think i will be going with the '90 carbs. still wondering if the air flow meter tool i have will work to sync the carbs? and should i leave the jetting alone, or go back down to the 110s?
Joe

 

Not sure if your airflow meter will work, it might be good enuf to get by. I've always used vacuum guage to set sync. As far as jetting goes, probably will be ok to be on a 120, 'specially if you go with the UNI filter, cause it will flow a little more air. And these bikes came jetted pretty lean from the factory. If I was doing it, I would leave it until the bike is done, ride it, check your plugs to see what kind of color you get, then go from there. Its not that hard to yank the carbs and swap jets, benn there, dun that.

-Mike

 

sounds good, ill just run it and see how it is.

 

really lookig good man! nice and clean! go with a sync tool, I have a motion pro one and am very happy. what a difference well sync'd carbs make

 

where can you get a sync tool, how much would i expect to pay for one?

 

ok, i looked, found one for about $90. is it at all possible to sync them with the tank on since the vacume fitting is beneath the carbs?

 

need the tank and air box off so you can get to the sync screws on top of the carbs. I usually just turn the tank sideways to keep it hooked up and not need an aux fuel tank