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  1. Mezzmo
    Post

    750 Seca to run with 650 Carbs?

    It can run on either engine as just jetting is different. Did you replace the throttle shaft seals? If the seals were replaced were they...
    Post by: Mezzmo, Aug 15, 2024 in forum: XJ Technical Chat
  2. Mezzmo
    Post

    Xj650 driving me nuts

    Yep, test them with the 43 and 112. I think it will be better. Once you fit them check the choke is adjusted so its fully closed and that the...
    Post by: Mezzmo, Sep 23, 2023 in forum: XJ Technical Chat
  3. Mezzmo
    Post

    Xj650 driving me nuts

    Looks like you are making progress. So that was new carbs with the stage 3 jets? If so, I would try those carbs with the stock jets to see what...
    Post by: Mezzmo, Sep 23, 2023 in forum: XJ Technical Chat
  4. Mezzmo
    Post

    Xj650 driving me nuts

    Good luck, as long as those Carbs are clean inside it should run.
    Post by: Mezzmo, Sep 22, 2023 in forum: XJ Technical Chat
  5. Mezzmo
    Post

    Xj650 driving me nuts

    Yep, there are the air inlets. I personally like Iridium plugs, these have resistors built in so you shouldn't use them with stock plug leads that...
    Post by: Mezzmo, Sep 19, 2023 in forum: XJ Technical Chat
  6. Mezzmo
    Post

    Xj650 driving me nuts

    Hi mate, check this link to find your model, http://xjbikes.wikidot.com/carb-specs should be 40 pilot and 110 main. XJ750 carbs will fit but have...
    Post by: Mezzmo, Sep 18, 2023 in forum: XJ Technical Chat
  7. Mezzmo
    Post

    Xj650 driving me nuts

    Hi mate, I have pods as well as other engine mods and it runs fine. Did take some tuning though. Pods alone wont need stage 3 jets, sounds like...
    Post by: Mezzmo, Sep 18, 2023 in forum: XJ Technical Chat
  8. Mezzmo
    Post

    Increasing stroke by swapping crankshaft

    Have you thought about using an XJ750 crank with oversized pistons? This will make your 650 an 820cc....
    Post by: Mezzmo, Jul 21, 2023 in forum: XJ Modifications
  9. Mezzmo
    Post

    Alternator Question

    Hi mate, just clean the rotor with some "wet and dry", I'd use around 600 or even 400 grit. It should clean up easily... Then you may as well...
    Post by: Mezzmo, Jul 21, 2023 in forum: XJ Technical Chat
  10. Mezzmo
    Post

    Alternator Question

    Sounds like the rotor needs to be cleaned and maybe you need new brushes as well…
    Post by: Mezzmo, Jul 18, 2023 in forum: XJ Technical Chat
  11. Mezzmo
    Post

    Cleaning fuel tank

    Check this video to see how I cleaned my tank which was quite rusty inside. I’ve done this to a few tanks and it works great and is also very...
    Post by: Mezzmo, Jul 3, 2023 in forum: XJ Technical Chat
  12. Mezzmo
    Post

    Please help.. lol 650? 750? Motogadget?

    Hi, I can’t really see from your pics. I installed an M unit blue on my XJ650. It’s a good unit and fairly easy to connect. I did do a video on...
    Post by: Mezzmo, Jul 3, 2023 in forum: XJ Technical Chat
  13. Mezzmo
    Post

    XJ750 Seca Led Light problem

    All you need to do is swap your stock flasher unit with a new one that suits LED's. These are not expensive and are pretty common...
    Post by: Mezzmo, Apr 8, 2023 in forum: XJ Technical Chat
  14. Mezzmo
    Post

    XJ750 starter cranks but no start.

    My guess is it’s carby related. Probably not what you want to hear, but if it was me I’d pull the carbides apart and check all slides are free,...
    Post by: Mezzmo, Apr 5, 2023 in forum: XJ Technical Chat
  15. Mezzmo
    Post

    Cam Chain Tensioner Upgrade

    Yep, I did it on my engine and its perfect. A straight fit and very easy mod...
    Post by: Mezzmo, Mar 23, 2023 in forum: XJ Technical Chat
  16. Mezzmo
    Post

    Xj550 Fuel Tank Rust Removal - from inside

    Not sure what method you used, but I'd suggest checking the fuel sender as there are delicate wires in there that don't like chemicals or electrolysis
    Post by: Mezzmo, Feb 1, 2023 in forum: XJ Technical Chat
  17. Mezzmo
    Post

    Engine cases are split

    Yep, agree on using Yamabond or even Suzuki equivalent, Suzuki BOND 1215. Just a thin coat is all that's needed. In fact if faces are clean then...
    Post by: Mezzmo, Jan 22, 2023 in forum: XJ Technical Chat
  18. Mezzmo
    Post

    Re-jetting ‘85 xj750 maxim x

    Hi mate, 6 Sigma has the jet kit you need. https://www.6sigmajetkit.com/yamaha-xj-750-maxim-jet-kit.html
    Post by: Mezzmo, Jan 20, 2023 in forum: XJ Modifications
  19. Mezzmo
    Post

    XJ650 jetting / mods for pod filter and 4-1

    All good, no such thing as a silly question....
    Post by: Mezzmo, Jan 7, 2023 in forum: XJ Modifications
  20. Mezzmo
    Post

    XJ650 jetting / mods for pod filter and 4-1

    I purchased my seals on eBay, they are from Germany…...
    Post by: Mezzmo, Jan 6, 2023 in forum: XJ Modifications
  21. Mezzmo
    Post

    XJ650 jetting / mods for pod filter and 4-1

    Yes, the v side of the seal is on the outside of the carby and the other side is square faced and goes on the inside edge.
    Post by: Mezzmo, Jan 6, 2023 in forum: XJ Modifications
  22. Mezzmo
    Post

    XJ650 jetting / mods for pod filter and 4-1

    Hi mate, I can’t open your pic but take another look at my video as I do show the seals faces with the v on the outside. Remember your carb is...
    Post by: Mezzmo, Jan 6, 2023 in forum: XJ Modifications
  23. Mezzmo
    Post

    Xj550 Fuel Tank Rust Removal - from inside

    Hi mate, check out my video on how to clean the tank out so its like new. Mine was pretty dirty and total time was 2 days to complete... [MEDIA]
    Post by: Mezzmo, Jan 1, 2023 in forum: XJ Technical Chat
  24. Mezzmo
    Post

    XJ650 jetting / mods for pod filter and 4-1

    Hi mate, I have pods, 4-2 exhaust and a lot of engine mods. Check out my videos as they might help you. As a start I’d suggest going only plus 2...
    Post by: Mezzmo, Dec 8, 2022 in forum: XJ Modifications
  25. Mezzmo
    Post

    XJ650 Final Drive Unit

    if its just the main seal leaking why don't you just replace that only with its o-ring? You only need those tools if you plan to remove the pinion...
    Post by: Mezzmo, Dec 3, 2022 in forum: XJ Technical Chat
  26. Mezzmo
    Post

    1981 XJ650 maxim wont turn over

    Try giving the starter motor a few taps. My bet is it’s the brushes worn out in the starter.
    Post by: Mezzmo, Nov 21, 2022 in forum: XJ Technical Chat
  27. Mezzmo
    Post

    XJ650 Final Drive Unit

    Hi mate, might be too late but it’s not very hard to replace the main seal and oring. Just standard hex bolts and a cover to remove. As long as...
    Post by: Mezzmo, Nov 6, 2022 in forum: XJ Technical Chat
  28. Mezzmo
    Post

    Primary chain guide: two or three bolts?

    There factory marks to show bearing and spacer sizing for crank and drive gear. Pretty sure it’s explained in the manual.
    Post by: Mezzmo, Jun 15, 2022 in forum: XJ Technical Chat
  29. Mezzmo
    Post

    XJ700S fuel cock replacement

    Hi mate, check this link https://www.cmsnl.com/yamaha-xj750_model16831/?gclid=EAIaIQobChMIsJGw2f6U-AIVT5hmAh2lrQuHEAAYASAAEgIQcvD_BwE It’s my go...
    Post by: Mezzmo, Jun 4, 2022 in forum: XJ Technical Chat
  30. Mezzmo
    Post

    1981 maxim 650 carbs

    Sorry, I thought you were asking how it fits into the slide. Chacal is right, that plastic piece needs to be pushed down onto the ledge of the...
    Post by: Mezzmo, Jun 1, 2022 in forum: XJ Technical Chat
  31. Mezzmo
    Post

    1981 maxim 650 carbs

    Nice one, sounds like it will be a runner…good luck with it!
    Post by: Mezzmo, May 31, 2022 in forum: XJ Technical Chat
  32. Mezzmo
    Post

    1981 maxim 650 carbs

    It looks right, the needle goes into the slide and is held with a spring and plastic bolt. Check my video as it might help. [MEDIA]
    Post by: Mezzmo, May 31, 2022 in forum: XJ Technical Chat
  33. Mezzmo
    Post

    Generator cover

    No issue with ribbed or smooth. I swapped my original smooth XJ650 cover with a ribbed version from an XJ750P as I think it looks better
    Post by: Mezzmo, May 29, 2022 in forum: XJ Technical Chat
  34. Mezzmo
    Post

    Primary chain guide: two or three bolts?

    Seems odd you can’t get the bolt in, can’t say I had any issue with the original 10mm hex head….something doesn’t sound right with your guide, got...
    Post by: Mezzmo, May 29, 2022 in forum: XJ Technical Chat
  35. Mezzmo
    Post

    Primary chain guide: two or three bolts?

    Hi mate, check out my rebuild video below. I used hex heads but socket heads will work too. I use Loctite on bolts inside the engine to be sure...
    Post by: Mezzmo, May 28, 2022 in forum: XJ Technical Chat
  36. Mezzmo
    Post

    Primary chain guide: two or three bolts?

    The latest version from Yamaha has only two bolts. Mine was the same. My vote is it’s fine as Yamaha must have had a good reason to make the change..
    Post by: Mezzmo, May 28, 2022 in forum: XJ Technical Chat
  37. Mezzmo
    Post

    Should there be play on the carbs nylon washer ?

    Hi Franz, no I didn’t replace the washers. Just all rubber seals, gaskets and jets…the shaft washer thickness is not that critical as the shaft...
    Post by: Mezzmo, May 28, 2022 in forum: XJ Technical Chat
  38. Mezzmo
    Post

    my xj issues

    Hi, I don't think the XJ900 calipers will work on the XJ650. The discs are much bigger and not sure its a great idea to mix things up like that...
    Post by: Mezzmo, May 27, 2022 in forum: XJ Technical Chat
  39. Mezzmo
    Post

    my xj issues

    Hi mate, check out my video which shows the choke ports in the float casings, my bet is they are blocked and will be the cause of your cold start...
    Post by: Mezzmo, May 27, 2022 in forum: XJ Technical Chat
  40. Mezzmo
    Post

    my xj issues

    Hi mate, your first problem sounds like a wiring issue, maybe follow the cables from the blinkers to see where its wrong. Pressing the lever...
    Post by: Mezzmo, May 22, 2022 in forum: XJ Technical Chat
  41. Mezzmo
    Post

    PLEASE HELP!

    Hi, it could be a lot of things but very likely related to a carby issue. Has something been changed on the carbies or was it running fine before?...
    Post by: Mezzmo, May 14, 2022 in forum: XJ Technical Chat
  42. Mezzmo
    Post

    Mixture screws sigma jetkit

    I've used the 6Sigma jet kit on my XJ650. I started with 45 pilot and 150 main but was too rich. Ended with 42 pilot and 125 main. Took a fair...
    Post by: Mezzmo, Apr 5, 2022 in forum: XJ Technical Chat
  43. Mezzmo
    Post

    Drive Shaft Leakage

    On my XJ that u joint has enough resistance to hold itself up. I use a torch and stick a bar in there around 1/2 inch diameter to get it lined up....
    Post by: Mezzmo, Mar 19, 2022 in forum: XJ Technical Chat
  44. Mezzmo
    Post

    XJ750P Emulsion tubes

    Hey guys, I pulled my carbs apart today. I measured the emulsion tubes and can confirm all external dimensions and side holes are identical. I...
    Post by: Mezzmo, Jan 23, 2022 in forum: XJ Technical Chat
  45. Mezzmo
    Post

    XJ750P Emulsion tubes

    Thanks Chacal. With regards to my current cams, what I did was purchase a very low kilometre (7000) 11M head to install on my XJ650 engine case....
    Post by: Mezzmo, Jan 20, 2022 in forum: XJ Technical Chat
  46. Mezzmo
    Post

    XJ750P Emulsion tubes

    Interesting stuff. I also notice my XJ750P mixture screws are fine thread and XJ650 are course, so the whole 2.5 turns goes out the window. Other...
    Post by: Mezzmo, Jan 19, 2022 in forum: XJ Technical Chat
  47. Mezzmo
    Post

    XJ750P Emulsion tubes

    Thanks Chacal, I have the WA version, 37H HSC32 carbs, so can I assume they are like a stock XJ750 which I also understand is the same as an XJ650...
    Post by: Mezzmo, Jan 18, 2022 in forum: XJ Technical Chat
  48. Mezzmo
    Post

    XJ750P Emulsion tubes

    do you know if the Y13 and Y14 emulsion tubes are identical?
    Post by: Mezzmo, Jan 17, 2022 in forum: XJ Technical Chat
  49. Mezzmo
    Post

    XJ750P Emulsion tubes

    Thanks guys. I never thought about the emulsion tube orientation but as hogfiddles said I agree there's a pin there to locate it. I will check...
    Post by: Mezzmo, Jan 17, 2022 in forum: XJ Technical Chat
  50. Mezzmo
    Thread

    XJ750P Emulsion tubes

    Hey Guys, As you might know I rebuilt my engine a while back and made several mods. Started as an XJ650, now bored and stroked with XJ750 crank to...
    Thread by: Mezzmo, Jan 15, 2022, 18 replies, in forum: XJ Technical Chat
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