So, as stated in the title , I recently purchased a 2007 Suzuki S40 as my second motorcycle. A short background - I've only been riding for about 3 weeks, and I had purchased a 1988 Yamaha Radian 600. It was a great bike, but it had a lot of oil leakage, and electrical issues. So, I sold it, and found a great deal on the S40 that I purchased this yesterday.

According to the previous owner, at some point, the owner before them had tried to do some sort of exhaust pipe modification, and had messed with the carb in the process. I'm not very mechanically savvy, so I reckon this is my time to learn with a small, and relatively simplistic engine.

While riding the bike (specifically 1st and 2nd), at low RPM, the engine will tend to bog down, though it gets a little better after the bike has had lots of time to warm up.

So, all this being said, my main question is am I in the right thinking that this more than likely has to do with something in the carb/exhaust area? Or is there something else I should be looking into first?

I'm talking like, low cruising RPM. Probably in the 2-3k range, if I had to guess.

As far as the muffler goes, it sounds relatively stock. I'm not entirely sure what all was done to it during the said "modification".

Like all new owners ,you should look into the carb,what size jets do you have,is it clean,has it had the spacer mod, is the float level set right ,what is your location (elevation above sea level ) are there any holes drilled in the rear of the stock muffler? these are questions only you can answer,but info we need to have to advise you.

Don't waste your money on a shop. These are EASY things to investigate. If you can make an effort to answer the questions, we can save you a lot of money and probably have the bike running better than the shop because the people here are experts at these bikes, shops aren't.

It is likely a carb issue or carb and exhaust. If you don't think you will ever have the will to let us walk you through opening up the carb, the answers to your questions are not able to be provided because that's where all the answers are.

I'm definitely willing to learn. I just don't want to do more harm than good, as this is currently my only means of travel. I sold my SUV this week, because I'm going to be moving to Florida from Ohio in about 3 weeks. I'll be driving the Uhaul, in which I'm going to load the bike, and my fiance will be driving her smaller SUV, and we don't have an extra person to drive the other vehicle for us. So the bike will be my only means of getting around for a bit.

The other main issue is, with the move, I don't have a ton of extra cash to dump into parts and whatnot, and my tool selection is functional, but probably not super adequate either.

Can you stop in Auburn AL on your way to FL? A few hours here in my shop and we can tackle this and teach you. Serious offer.  My home shop for free...not a shop with fees  

I certainly appreciate that offer! Unfortunately, the bike will have to be the first thing loaded, and the rest of our current 3 Bedroom house will have to be loaded around it.

I have, however, already ordered the Clymer manual, so I will do some reading, and more research online.

As for loading the bike, I will have a few friends available to help. Thankfully, these are light machines, so it shouldn't give me too much trouble. Worst case scenario, I have to ride the bike in, and filming will be forbidden, haha.

Crashmk1 wrote on 06/21/18 at 19:25:53:


OK.....so you are currently in Oho.

Can you perhaps mention a City?  (Or are you on the run or in a witness protection program?)