Hello all, I am doing this for those of us that are not able to spend 300-500 on exhaust.
I have only been riding a very short time and wasn't able to find many reviews on this brand of exhaust. The reviews I have read didn't often review the exhaust every "x" amount of miles. So, I have decided to make an attempt at reviewing this exhaust even though I am only 12 days and 'bout 1150 miles into riding.
I paid 145.87 shipped to my door (shipping is free depending on location).I ordered my JISU exhaust on the 21st of July '14. My package arrived on the 25th of July '14 with 2 sets of springs, a metal strap (that you bend for exhaust) with the rubber piece (that I did not use) and the adapter (from pipe to slip on).
As other reviews I have read, my product was wrapped very well and was a pain to unwrap. Also the stock bolt did not fit the metal hanger, so I improvised because I don't have a file. I took the bolt and nut from the metal band that held the stock exhaust on. I then shaped the metal hanger band to the exhaust so it would be positioned properly when installed(minor scratches cause I did not use the "high" temp rubber to protect from scratches and vibration most likely. Putting the JISU on was 10x's easier than taking off the stock exhaust.
After installed it has a nice deep tone to it, "throaty" as others have reported. Personally, I always ride with ear plugs in so I didn't realized how big of a difference in sound till I changed my plugs. I am in my garge plugs in fairings back on. I bring the choke back to warm the bike and decide It may be better for my ears to turn the bike around and face it out the arage door. It does get higher pitch which was expected because of it being a 250.
I acceleration seemed similar to before but it does seem to have just a little bit more push which is nice but not to much needed cause I am still begining.
The down shift sound amazing though. I have only put about 150 on the exhaust and I will update in about 200 miles. Being not the high quality like other slip ons Danmoto suggests to check the packing with a flashlight to make sure it is not coming out.
Per DaBlue and TurtleSE I should Jet or at the least shim my carbs. So I will also update if I do this and a noticeable difference is made.