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VJ

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Everything posted by VJ

  1. VJ

    Gsx1100g Gearbox

    As i said it does seem like youve thought this through and tried a lot of things. Ive known a lot of IL4s vibrate quite badly if the throttles arent correctly synced to eachother though.
  2. VJ

    Gsx1100g Gearbox

    Sounds like you've exhausted a lot of options. One other one that comes to mind now ive thought about it, have you balanced the carbs recently?
  3. VJ

    Gsx1100g Gearbox

    aye Id be looking elsewhere, How are your engine mounts? Nice and tight? front mount rubbers not perished?
  4. VJ

    Gsx1100g Gearbox

    Having ridden both I dont rate the balancer system on the G to be honest, definatley not enough to make a modified set of cases to convert over to chain drive. The balancer it just saps a bit of power and doesnt really reduce vibes (I took the weight out on my last build) Also G engines are like rocking horse shit.
  5. VJ

    AFR tuning

    Well ive been out on the bike this weekend and found it was a bit lean on midrange so I popped home and lifted the needle, its running a lot better now. Im a bit confused now with my readings though. If I cruise at 8.5k then I get around about 13:1, 7k is around about 14.7:1 5k is around 12:1. However if I do a WOT pull from 3k up to 9k in 3rd I get around about 11:1 all the way through. Im a bit confused about where to go now but I think its close enough to be safe for now.
  6. VJ

    AFR tuning

    Interesting, that would suggest 20 seems to be a good size for me to try next then for pilots. I know what you mean about not wanting to take carbs off. Yeah im glad I got the wideband setup, ive been fucking around with 'seat of the pants' dyno tuning for years but its really reasuring to see a gauge co oberate my thoughts.
  7. VJ

    AFR tuning

    weather is absolute shite here today so I havent had the chance to go out on the road to test today. Ive now got 157.5 mains fitted, 15 pilot jet, and the needle on the middle position. When I fired it up with 15 pilot jets and 2 turns out on the screw my gauge was pinging very lean (off gauge even) so I dialed the pilot screw out half a turn at a time to see what I could get it down to. I came to a comprimise and stopped at 4 turns out being 15.8/16.5 on my gauge. Ideally id like it a lot richer but I dont want to unscrew the screws anymore incase they fall out. I think I'll be putting some meatier pilot jets in when I get the time but I think that will do for now on the bottom. Just waiting for a dry day to go test my main and needle afr and see if I need to buy any more brass other than pilot jets before i trek back to allens. Cheers John
  8. VJ

    1100 shafty

    Book says 94-127Nm. If you want to PM me an email address I can email you the service manual if you want.
  9. VJ

    AFR tuning

    So I popped into allens in bingham on friday and got some 157.5 mains (they didnt have 4 160s avaliable) Ive just put them in and also dropped my needle one as suggested by say what now!?. as for pilot jets I realised they are unbranded '30' size so in the interest of knowing where I am and getting a better baseline figure Ive put some actual mikuni 15s in to see what I get there. Work stops play for a few days now though, hopefully I can nip out on thursday afternoon and see how its running now.
  10. VJ

    AFR tuning

    Yeah Im glad its rich rather than lean but it deffo needs fixing, its easy enough for me to do needle height with the carbs still on the engine so im not too fussed about doing it in one hit. Luckily Ive got an NSL road near me that is a long hill so im sorted for loading, yeah its not going to be as quick or as accurate as a dyno but im mostly doing it as a learning exercise.
  11. VJ

    AFR tuning

    So ive just been out for my first ride with the AFR display on. Im getting around about 10.5-11:1 at idle all the way up to 7k rpm (ish) then it leans out to 14.5 and even dips into high 15s. as I hold it at 8.5k Now these figures are all by eye not data logged to the rpm so I cant be 100% accurate, im more trying to hold an RPM and see what I get, It has told me I need bigger mains in it so I'l go from 150 to 160 mains and see how it looks on the top there. Im also not going to change anything else until I've got mains dialed in, seen as fuel through the emulsion tube past the needle will be effected by the main jet size it seems a bit like pissing in the wind to change that before Ive got the mains happy. Cheers VJ
  12. VJ

    AFR tuning

    Thats great cheers, To be honest I'd have been very suprised if there was an x=y straight ratio for it condisering how many variables there are but its good to have a ballpark idea of how many sizes to jump. Cheers VJ
  13. VJ

    AFR tuning

    Hi guys and girls, I'm looking for some advice on tuning. I've set up a wideband o2 sensor setup on my old ratbike now and will be going out for trial runs over the next few days and noting the AFR at WOT,3/4, 1/2, 1/4 etc ready for me to make adjustments to suit. My question is: is there a clean cut number between jet sizes and AFR ratio to help me dial it in without having to buy too many jets? e.g -5 on jet number = 1afr etc. Also same question with needle heights. If anyone is interested in specs its a gsx1100g with a DOT head and cams, 36 CVs with pipercross sock filters and a cut down micron on a 4-1 pipe. I'll update this as I get the runing done incase it helps anyone in the future. Cheers John
  14. VJ

    Oil Pumps

    well I took it apart and its fucked, loads of scratches and pitting everywhere, time to get on eblag and find a cheap spare. Cheers John
  15. VJ

    Oil Pumps

    gsx1100g shaftdrive
  16. VJ

    Oil Pumps

    The pump looks the same as the powerscreen and the 1127 gsxrs from what I can tell from looking at the manuals. I guess It is probably safer to try another pump, Might crack this one open anyway though seen as its only 3 bolts either end with locktabs. edit: Part number for the G is the same as blandit 6, powerscreen, teapot 6, teapot 750 and gsxr11 from 86-88. Kinda kicking myself for throwing out a spare teapot 750 bottom end now.
  17. VJ

    Oil Pumps

    So I'm rebuilding my gsx1100g engine that blew a conrod through the cases. Ive got new cases and crank and am hoping to save as many parts from the dead engine, clutch and gearbox have survived (will get new frictions anyway as they are a bit worn) but im worried about the oil pump. A LOT of big end journal bearing, piston crown and rings were found in the sump and the oil strainer so I want to take the pump apart and make sure its clean but every OSS manual I've got says is not user serviceable and only available as an assembly. How much of this is bullshit? It cant hurt to pop the covers off and check its clean inside right? also is there any way of checking the output pressure without engine complete and running? Cheers John
  18. right, I need a stronger pressure plate tool then or a dugga dugga gun. I'll have another shot in a few days then. Cheers John
  19. Making progress on my gsxg engine rebuild but I cant get the clutch centre nut out, I welded some bar onto a steel plate to try and make a holding tool but all it did was bend the plate. Any amazing tips to get it out without needing to buy the proper tool? Cheers John
  20. not one of the crankcase bolts, THAT BASTARD crankcase bolt aka, how to learn how much you shoulda got the manual out....
  21. have worked out the ones I need now, found 3 on Eblag in the uk for cheap so got them. did you not get tapped up for more from customs for the US import ones? Cheers John
  22. I stand corrected, that'l teach me to believe an Eblag advert Cool so i need my manual for the comparison chart and then a 25-50 micrometer on the journals and then i should be good to go? Rods are in place on this crank so at least thats saved some money. Any preferred supplier for the shells? Cheers John
  23. Im building a spare gsx1100g motor at the moment and a quick google shows that the bearing shells are the same for all OSS engines. Does anyone know the cheapest way to get the right set of shells in there? I have cases and a crank, im not sure if the crank came from these cases although I bought them from the same seller. Cheers John
  24. No worries. Ive got a g engine in my rat and 2 bottom ends kicking around that i need to build into one so if you need measurements of anything i should be able to help.
  25. cases are not the same, its got a different output shaft and bolt centres to fit the bevel box on it. also has a balancer shaft on the front left of the engine.
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