gsxr1100 bogs in low rpm range

[stockgp]

took my 96 gsxr1100 to work today. it's been, on the short test rides i've been taking, sluggish in the low rpms. during takeoff and at low rpm after gear shifts it's almost like it wants to stall, but doesn't get close enough to cutting off that i think it will.

at speed, the bike runs fine and is quite fast. idles fine while stopped, never sounds like it wants to die.

i can tell you for sure that the bike has a k&n air filter and a hindle fill exhaust. supposedly, the bike also has a 1300 big bore kit. who knows?

so, i know kats don't like k&n filters. is this also true for gsxr models? or does this sound like improper jetting or air//fuel mixture?

[scottynoface]

Sounds like a high flow filter and high flow exhaust without being jetted appropriately. Any idea what size jets are in the carbs?

[stockgp]

nope. i bought the bike as is, the guy that had it before me didn't seem to know much about it

[DumbLuck]

clean teh carbs paying special attention to the pilot circuit. before removing the a/f screws count the number of tirns IN before they seat so you can set them back where they were. If your needles have slots on top where the little C clip goes you have a jet kit. stage one or stage 3 depends on the main jet size. I would suspect it's a state 3 kit as you have individual pod filters. dont mess with any settings or adjustments untill after a very thurough cleaning with special attentin to the pilot circuit. if it looks clean, clean it again, thrice. If the carbs are really really clean, then start goofin with the adjustments, starting with the a/f screws. again, make sure you count the turns IN before removing them so you have a baseline for the PO's setup.

[stockgp]

To be exact, it's a k&n drop-in in the stock airbox.

If need be, I'll take the bike to the shop. I've already had this thing apart tooany times since I brought it home. Getting the carbs out an back in again isn't exactly my idea of fun

[DumbLuck]

do the needles have multiple slots to adjust the height?

[stockgp]

I don't know. I only had the carbs out so I could have enough room to replace the alternator drive bushing. Never did inspect/ clean them or anything. They looked at a glance like they've been cleaned Or rebuilt recently

[rigidone]

definitely clean the pilot circuit, that's usually the first thing to clog up....i've done 5 or 6 carbs recently that had a plugged pilot circuit...

[waffenampt]

what ar the pilot screws set 2?

[rigidone]

waff, the service manual doesn't have a listing for the BST36, but for the BST40 it ranges from 1 5/8 - 2 turns out...All that's reflected on the 36mm carb is factory pre-set....

rigid

[tone]

BTS36ss pilot screw setting 2 turns out

[stockgp]

factory setting yo mean?

i imagine i'll not do anything with it until riding season is completely over. she'll be getting a repaint anyways

[rigidone]

let us know if u remedy the problem...

[DumbLuck]

stopgap measure, it's worth running some seafoam thru the system. just follow the mix directions on the can.

[rigidone]

ok my uncle's bike was having the same problems....i just finished tearing her down dissasembling the carb completely and giving them a thorough cleaning putting the jets in mopar penetrating fluid....the pilot jets were plugged solid lol....the bike's screaming now, so just thought i'd give ya an update...his low rpm bog is gone...