Ok, I got a 95 Gsxr 750 about two months ago, has a bad stutter up till 3500 rpm. I have took the carbs out, cleaned all of them completely, replaced all the o rings that needed replacement, new vac caps. Reinstalled, new throttle tube, snapped the old one. New fuel lines, and it still has the same stutter. I'm really getting tired of chasing my tail on this and cannot afford to send to stealership to get fixed. Any ideas? Mods my bike has: dynojet stage 1 jet kit, d&d slip on muffler, and that's about it as far as I know.
Also one more thing that I noticed is the intake boot on the motor, not the airbox, but the one on the motor for cylinder two looked damp. Not dripping but just looked damp while the rest looked dry. Any ideas?
Cody, whats up man! I see you are still screwing around with the carbs, dammit man! I remember when you first came on here and said that you were a novice at stuff like this and it seems to me that you need to find a carb guru to send them to, if you had done it a month ago you would be riding headache free, and from what I understand these guys love just working on them and not out to feed the family. You have fire or it wouldnt run, it is hard to screw up a cdi box, I talk from experience. then all you need from that point is fuel and air. I might be wrong but I used to race these motors in mini-sprints back in the day and they are almost indestructable as far as the ignition side goes. On the other side of this the carb set-up can be somewhat unforgiving and if you miss just one little thing then it will give you all the problems you are having. I am still playing with my carbs and I have been around all kinds of injection and carbed vehicles throughout my life, I am close but still not happy.
Do yourself a favor bud and send them off, you wont be sorry.
Oh by the way I am glad to be back, got moved, and finally got some internet out here in the sticks It will be a while before I get back to work on the bike but will keep you guys updated when I do.
I did everything that was told by Sabba, I pmd ccmhunt and he never messaged me back so dunno there, even got banned from here for a week for calling old gixxer a douche bag. But my bike still misses up till 3500. I'm at a damn loss as to what to do next...
cody....I am sorry, I get what can be at times a overwhelming amount of contact and questions and things get lost in the shuffle...I get calls, pms, texts, emails....I have 7 carbs in the shop right now and another arriving from Australia, not to mention airboxes I make etc, and my full time job.
Damn ccm it sounds like you have two full time jobs, and cody???? "douche bag" ??? too funny! I am far from a guru but I have found out that if you read everything that is on here you can get it close and then from there it takes a guru or alot of patients. Just keep trying to figure it out and when you finally do the satisfaction will be well worth the frustration. I think the sweat equity is what owning one of these bikes is all about, if I didnt want to tweak on it then I would just go get a new bike and a some packs of stickers to make it really mine
Sorry if you have answered these questions previously, alot of carb threads come and go through here...
Was the jet kit installed by you (new), or by the previous owner? You will need to confirm that you have DJ emulsion tubes to work with the DJ kit. If they are still the OEM tubes, it will not work properly. Also check both the carb needles and tubes for wear.
Are the floats set to 15 mm?
All pilot jets have been removed, cleaned, and confirmed clear?
All pilot screws set at 2.5 turns out as a starting point?
The slide lift holes have been drilled to 5/32 as per DJ instructions?
Don't give up on this...these carbs can be super fincky and unforgiving
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Dynojet Stage 1 kit, Goodridge braided front lines, K&N filter, '07 GSXR 750 shock, shimmed clutch springs, Factory Pro "Pro" shift kit, Motion Pro R1 throttle, aluminum fan (with manual switch), Jardine RT-One race can, '94 magnesium engine covers, Yamaha aluminum bar ends, sexy Russian co-pilot.
Ccm, its all good bud, no harm no foul. Sabba, it was all done by PO, so I don't know what sizes he used and yes I do believe the slide holes are drilled out, as they look slightly larger than the needle hole. I took everything I could find out of the carbs and cleaned them so I guess yes, I cleaned everything.floats are at 15mm out as close as I could get.
If need be, I will tear those f***ers back out and re confirm and check for any other markings to confirm its a dynojet kit but I didn't see any marks at all
Yeah take pics, and confirm all sizes. Closely inspect the needles and emulsion tubes for wear...they can cause overly rich symptoms down low if worn out.
Jets don't wear, needles usually show a abraded worn pattern on one side midway up(if they have been spinning in place it could be on several faces) where they contacted the needle jet, and the emulsion tube will demonstrate wear in that the opening that the jet needle rest in will be oblong in the direction the needle wear indicates .. As it is the jet needle that wears the needle jet (in your style carbs it also serves as the emulsion tube... In more downdraft carbs not so).
Ok went and got the carbs out today, got them all tore apart, but I'm having trouble with the jets in the airbox opening, only got one out, but I took pictures of all the needles and emulsion tubes and jets. Let me know what you think...
I remember when you first came on here and said that you were a novice at stuff like this and it seems to me that you need to find a carb guru to send them to, if you had done it a month ago you would be riding headache free, and from what I understand these guys love just working on them and not out to feed the family. You have fire or it wouldnt run, it is hard to screw up a cdi box, I talk from experience
. then all you need from that point is fuel and air. I might be wrong but I used to race these motors in mini-sprints back in the day and they are almost indestructable as far as the ignition side goes. On the other side of this the carb set-up can be somewhat unforgiving and if you miss just one little thing then it will give you all the problems you are having. I am still playing with my carbs and I have been around all kinds of injection and carbed vehicles throughout my life, I am close but still not happy.
It will be a while before I get back to work on the bike but will keep you guys updated when I do.
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