JRR

I buy mine on E-bay , chinese made and priced at 15 pounds but fits and any way it havent shown any problems after it was mounted

Yes thats true what slabbyruss712 says, the gs 1000 from Delkevic fits, I bought a Delkevic 4-1 for gs 1000 and mounted it on to my 1984 gsx 1100efe (1135ccm engine) fits right on to exhaust ports and everything ,only thing if it is to be mentioned was the rearbrake pedal toutches the exhaust pipe when its fully enganged , doesnt stop the brake from working but only the pedal touches

If You need parts for suzuki gsx 1100ef or other older suzukis I will recomend : www.cmsnl.com they got really well exploded wiev part ,with nr for every parts and are rearly out of stick like many are with these old bikes ,and they have almost always some pounds cheaper on every part, and they ship to almost every where in Europe for 15-20£ in shipping fee I buy ball my parts from here and can recimend them for sure

I had the same leak when it sat at the side stand, and couldnt find the leak ,I reaaly tried everything , so by a luck and just coinsidence I discovered that the oil rubber ring(oval) that is under the plate that the oil pressure switch and oiltemp switch was leaking, tried to thighten it down,but it didnt help, Than I changed the rubber ring for the plate the sensors are mounted in and the o-ring on both the pressure and temp switch ,thightened it all down, and ----viola -no moore oil leak the oil leak on to the top of the gear casing behind the cylinders, and the leak from the sprocket cover gear shifter was also just gonne,on the egde that is the front sprocket cover screwed to (the top of the gear housing/block there is a hole on the top inside , that is there for leding water and stuff away from the top of the engine so the fluids not shall collect on top of the engine , under the carbs and fill up the starter outsparring , and when the oil leaked out that hole the oil poured on inside of the sprocket cover from the top,so the sensor plate oil leak ended escaping there and if I sat the bike on its side stand the oil poured from top of gearboks , trough the hole in the cover for the front sprocket and came out under ,started dripping from gear selector and the lower edge on the engine ,looked for sure like it was from under the side cover the leak was BUT SO WRONG WAS I,it was the rubber seals on the pressure switch and its mounting plate the leak was located .I was sure it came from under the sprocket cover , but now after changed the seals on pressure /temp plate and, cleaned well under the cover and on the top of the gear housing, the leak is stopped on the top , and after that never have my bike shown sign of oil leak neither from sprocket cover or gear selector or any other place and this and now a bout 6months since now, and it was quite a large leak, absolutly visible on the road and pavement after it had been parked for 10 min or more,no leaks since I fixed this have passed and several 1000km the oval rubber seal for the plate cost 7£ and the o-ring for the pressure switch was 2£