So I am wanting to do away with the air box and run pod filters on my GSX250. Now I know that there are some issues as the stock carby, mikuni BS30 SS is a CV. This is where I'm at right now. I can get the bike to idle fine after a few minutes of warm up and seems to rev ok in neutral. There may be a slight lag in response but I am unsure as I have nothing to go off but I do not feel that this is a problem. As far as having the engine "under load" and how it performs is currently unknown as it's not quite ready to blast around the streets. In saying that I believe that this is where the problem will be. After searching the internet for thoughts and solutions to this problem the best I could find was on here. It was a thread by Dave H titled "Another GSX 250 CafeRacer" Going from the pics he was using pods and seemed to have luck with a 118 main and a 120 pilot. So now for a few questions Would changing jets to 118 main and 120 pilot be the first place you would start? What other things would influence the setup? Exhaust, condition of engine What else would need to be done to the carby or the engine? And I guess most importantly is it even worth going through the process?
CV carbs are almost impossible to get running correctly with pod filters. If you do go down that route, change 1 thing at time on the bike/carbs and test. The other, more expensive option, is brand new carbs.
That article kept popping up in a lot in google. It is a very good article and written in simple language. After thinking about this over the last couple if day I am now going to put the air box back in and get it up and running to make sure that if I do start to play around with the carbys I know that it everything else will be good and any changes I make are not effected by other factors. So next task. Engine out, air box back in. I also have a spare carb so might start to play around with that and pull it apart to gain a greater understanding of how the work
I keep some useful information, including that one, on my links page. http://www.litetek.co/links.html