Hi, finally not just lurking anymore
So I bought a 1994 gsxr1100 last year and thought I would use it to learn a bit more wrenching to occupy me while studying. This is my second bike, after an RC390 (yes, I did want to buy a 600 to track since I took the 390 to the track a couple of times and absolutely loved it.) But after seeing some 1100 cafe racers I really wanted to make a badass 1100 that could be used on the track too.
It was supposedly in ok shape, cosmetically bad, but engine seemed to be running fine. Did not get to test it, and bought it cheap, so kind of a gamble.. But with my plans I didnt really want to "ruin" a nice example anyways.
Long story short: it has been a lot more work than I wanted..... To give you an idea of hos it had been used: the front sprocket nut was stripped completely and was hanging by the little "safetybolt" (and he said I could testdrive it.. right), the chain must have been greased with fuel because I used a week to degrease the whole bike (it had some shitty "automatic greaser" connected), and now I also think the rod-bearing on syl.2 is bad. Anyways.
Last year I removed fairings (they were ruined anyways), changed some bearings, new sprockets and chain, overhauled calipers, new tires. All the usual stuff. And rebuilt the subway "temporarily".
Time to drive. Realised the discs were warped badly, fork was shot completely it seemed, it seemingly ran cold (later found the gauge to be broken), and it completely drowned or cut above half full throttle. So no more driving that summer..
I will post some pictures of her below..
This winter I went over as much as I could on the car. And thought I had fixed the seemingly easy problems..
So, I have a couple of real headscratches for you that I cant figure out for the life of me:
1. "Drowning" under load.
Took the carburettors out, thought the diaphragms were all bad, they seemed nice. Changed them anyways. Cleaned the whole carb, but wasnt really dirty. And installed a jet kit as I am running open carbs (I have unifilter pods laying) since the airbox was broken from previous owner to remove it.. And yes, I am aware that it is not smart to run without airbox, but this is not an airbox issue I am certain, as it occurs when standing still also. And I am running a somewhat more open exhaust. Also checked boots for leaking, seemed fine.
Still exactly the same problem after all this.. only it seems to run a bit better low down. I havent gotten to synchronize them yet either. Checked all plugs, plugwires and both coils, also checked valveclearence which were all within spec.
I dont understand how it can be the carbs anymore, even sprayed wd40 everywhere, not finding any leaks. And they would have to be pretty big i guess. Also changed fuel-lines and overhauled petcock.
I am now thinking it could be timing related somehow? A bad igniter, although I can get it up to redline slowly.. could it be that the timing isnt advancing, or that something else just gives.
I will upload a youtubevideo that shows clearly what is happening.
And trying to check the timing brings me to the next question.
2. Checking timing
How do I check the timing on this bike, when trying to use the timing light on the signal generator it just spits out oil when running.. I hoped that it could give me a clue on my problem, but I dont want to run it when loosing so much oil.
3. The fork issue.
Problem was it seemed totally dead; soft and absolutely no rebound.
Opened it, changed both sliding metals with all bushings and new oil. Changed springs to some stiffer linear springs while I was in there. This was the first time I have opened a fork. Put all back together, and still no rebound? Even with rebound adjusted to the fastest.
I think it is the inner damper rod, it was really hard to pull both in and out when removing air, and there was always oil coming out in the middle of it? I didnt take out the damper rod, and I am guessing there isnt supposed to be oil entering the damper rod inside. Are there any seals around the damper rod assembly that can go bad and show these symptoms?
Listening to the video (will be uploaded) do you think a rod-bearing has going bad? Or could it be a clutch-bearing or basket or something? The clutch is stuttering a bit when engaging, so there could be something there. Putting a screwdriver to the cranks does indicate something knocking inside under the second cylinder though..
Sorry for the long post, I like to write. Cheers