Sticks16 wrote on 02/26/13 at 10:12:44:I found this thread interesting as I'm wondering if I should mess with the jets at all when I finally get to the carb. I bought my Savvy over a month ago and the day I brought it home I had it over 80mph on a highway straight with some wind resistance. It had more room to go but I've since been tearing it down to modify and lighten it some. I've done a great deal of reading about different peoples setups as well as Lancers jetsets on here etc and found one guy with a similar setup to what mine is from the previous owner. I believe he said he had the carb open but I forgot to ask if he switched anything because it does have a Jardine slash on it and runs and sounds sweet. My question to you guys who have been messing with different factors and Ryca kits is: What filter do you feel is best to replace the airbox and also if it seems to be running fairly top as is should I dive into the carb and see whats up for the hell of it? Afterall it does backfire here and there and I read doing the Ryca spacer mod or even using the washers may help with that?
Thanks, J
Hey Man!
There are lots of answers to these questions here on the forum; everyone has their opinions about what works best.
In general though, most folks don't mess with the carb jetting unless they are also changing the air filter and exhaust.
Forgive me if I am over-simplifying, but Carb jetting determines the correct mixture of air and fuel going into your engine. A completely stock bike should come properly jetted from the factory (Although a little lean to meet emission control standards, but that's a whole 'nother ball of beans)
If you add a K&N or similar, more free flowing air filter, along with a more free flowing exhaust; such as the Harley Dyna pipe which is popular with these bikes, then you need to change the carb jetting accordingly because you have changed the air/fuel mixture flowing through the engine.
Simply changing the carb jetting on an otherwise properly running bike will almost always make it run worse, and won't give you any advantage all by itself. You have to consider the whole system; air intake, carb jetting, and exhaust. They all work together.
Cheers!