81 Suzuki GS550e exaust and jetting question.

[flyboy667]

I have been running a cowley 4 into one and bike ran great . Just put on a reverse megaphone muffler and bike is alot louder and I am sure the power has dropped a bit mid range 4000rpm and power is there low and high rpm .I could live with it. Does it need to be re jetted or is there anything i can do. I have just replaced the plugs (B8ES) Maybe pack the Muffler with wire wool to give it more back pressure ?

 

[hillsy]

Your carbs should have adjustable slide needles. Move the c clip down a notch and see if the problem goes away.

You should be able to get to the needles without having to remove the carbs from the bike.

 

[rockcitycafe]

"back pressure" is bad. Mkay? It's probably running rich midrange, grab one of these http://www.ebay.com/itm/Innovate-LC1-Wideband-DB-52mm-Kit-O2-BLUE-LC-1-3795-/270904657477?pt=Motors_Car_Truck_Parts_Accessories&hash=item3f132d0645&vxp=mtr and get it dialed in

 

[edgeofvamp]

I hate to pry, but do you still have the 4 to 2 exhaust? Tell me to get bent if need be, just had to ask. I am not even sure if it will fit my 83 gs1100, but it is worth asking.

Sorry for the thread jack.

 

[Big R]

I hate to pry, but do you still have the 4 to 2 exhaust? Tell me to get bent if need be, just had to ask. I am not even sure if it will fit my 83 gs1100, but it is worth asking.

Sorry for the thread jack.

The exhaust from a GS550 will not fit your 1100.

 

[Homesick vagrant]

Your carbs should have adjustable slide needles. Move the c clip down a notch and see if the problem goes away.

You should be able to get to the needles without having to remove the carbs from the bike.

After 80-81 suzuki went to CV carbs, they don't have adjustable needles. What size are your jets now? I might have some laying around you can use that might get you close