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engine

  1. Ddkod
    Thread

    1983 XJ750 Engine Swap into a 1982 XJ650 Seca

    Hello all, I'm planning on picking up a 1983 Maxim engine and swap it into my 650 Seca frame. I currently have over 35,000 miles on the engine and...
    Thread by: Ddkod, Sep 23, 2025, 4 replies, in forum: XJ Modifications
  2. SqBobSpongePants
    Thread

    I need replace my engine bottom crank case

    Hi all. I have an 1980 XJ650 4KO and I need to replace my engines bottom crankcase. Currently I can find a reasonable clean looking crankcase for...
    Thread by: SqBobSpongePants, May 26, 2025, 11 replies, in forum: XJ Technical Chat
  3. Neashfella
    Thread

    Engine for sale UK

    Anyone in the UK looking for an engine, last run around 8 years ago and dry stored since then, in really clean condition
    Thread by: Neashfella, Apr 6, 2025, 4 replies, in forum: For Sale, Trade/Swap, Wanted
  4. Shelby Biggs
    Thread

    86’ XJ700X Engine rebuild kit? Does it even exist?

    Decided to buy another XJ project (1986 Yamaha XJ700X) because I didn’t learn my lesson the first time. Moto shop said it ran, and I’m sure it...
    Thread by: Shelby Biggs, Mar 30, 2025, 2 replies, in forum: XJ Technical Chat
  5. Cfy22
    Thread

    1982 XJ 550 MAXIM 6k rpm in 6th gear only doing 120kmph

    I have a 1982 xj550 maxim I've had for a few months and it preforms poorly at highway speed, it rips through 1st to 4th gear no problem but when...
    Thread by: Cfy22, Jul 1, 2024, 2 replies, in forum: XJ Technical Chat
  6. Jadds
    Thread

    When is an engine rebuild required (1981 XJ650 4KI)

    I have been told the bike I purchased (In bits with engine separated from frame) has done 30,000km. The engine has been sitting for maybe 3 or...
    Thread by: Jadds, Nov 2, 2023, 14 replies, in forum: XJ Technical Chat
  7. Brock M.
    Thread

    750 SECA Engine Rebuild Question

    Question BLUF: how do I know if something is wrong without a known-good reference engine or cringing while on a post-breakin test ride? The...
    Thread by: Brock M., Oct 13, 2023, 9 replies, in forum: XJ Technical Chat
  8. Jake Bane
    Thread

    Wanted HELP '82 Seca 650 parts!

    So I recently acquired an '82 Seca 650 that had been sat for many years, I saved it from the scrapyard and has now become my project. I worked...
    Thread by: Jake Bane, Jul 30, 2023, 7 replies, in forum: For Sale, Trade/Swap, Wanted
  9. river bringhurst
    Thread

    1983 carburetor issue

    So I have a 1983 xj650 Maxim and it’s been sitting for two years so I cleaned them and got the butterfly valves moving with the throttle because...
    Thread by: river bringhurst, Oct 25, 2022, 5 replies, in forum: XJ Technical Chat
  10. aSECAwrencher
    Thread

    Free 83 900rk parts engine and tank

    The engine is fairly complete. Picked it up from @hogfiddles on one of my last trips to New England years ago. It is absolutely not in running...
    Thread by: aSECAwrencher, Aug 8, 2022, 8 replies, in forum: For Sale, Trade/Swap, Wanted
  11. PlzHelp
    Thread

    Unknown part in cylinder - 82' XJ650 Maxim

    Hey guys, me again. After the success of getting new keys for my 82' Xj650 Maxim, I decided to clean the tops of the cylinders to get ready for...
    Thread by: PlzHelp, Mar 2, 2022, 7 replies, in forum: XJ Technical Chat
  12. Clure77
    Thread

    Need Help Addressing Damage After Crash

    Hi everyone, I just joined so allow me to introduce myself. I do not own one of these bikes but yesterday I went with my friend/ roommate to look...
    Thread by: Clure77, Apr 29, 2021, 3 replies, in forum: XJ Technical Chat
  13. mshah0686
    Thread

    Smoke from under engine?

    I'm having 2 problems (2 that I've found) with my 1982 XJ750J. The bike has been sitting for about 2 months. 1) After running (even at idle) for...
    Thread by: mshah0686, Feb 4, 2021, 32 replies, in forum: XJ Technical Chat
  14. Bigmacke
    Thread

    XJ400 engine noise

    Hello, i recently bought a 1982 Yamaha XJ400, when getting it home i noticed that it made a weird clunking/ticking noise from the engine, some...
    Thread by: Bigmacke, Nov 23, 2020, 3 replies, in forum: XJ Technical Chat
  15. Kalikiano Kalei
    Thread

    HUGE 'Clunk' when shifting from neutral into first gear.

    My 1983 Yamaha XJ900R is a really lovely bike. It has less than 10K miles on the ticker and looks near-new, such was the care it received before I...
    Thread by: Kalikiano Kalei, Apr 22, 2020, 6 replies, in forum: XJ Technical Chat
  16. Ben Babuski
    Thread

    I'm new to mechanics and I'm taking apart my engine!

    I have a 1982 Yamaha XJ650 Maxim that I bought for dirt cheap from a guy off of eBay. I got the bike because I wanted to learn how to work on bike...
    Thread by: Ben Babuski, Nov 26, 2019, 10 replies, in forum: XJ Technical Chat
  17. SwIrv
    Thread

    Moving engine off frame (81 Xj650)

    I started removing my engine off the frame and I got everything off except bolt number 7. I hit it with WD-40 and other penetrating lubricants but...
    Thread by: SwIrv, Apr 12, 2019, 7 replies, in forum: XJ Technical Chat
  18. Winsleydale
    Thread

    1982 XJ750 Maxim Redline at startup

    Hi everybody, I joined the forum to see if I could get some pointers on an issue I am having. I picked up this bike as a trade for an old pickup...
    Thread by: Winsleydale, Mar 18, 2019, 11 replies, in forum: XJ Technical Chat
  19. DimaV
    Thread

    Big fat bolt leaking

    sup, guys Faced an issue. Saw that oil leacking out of it. There was a tiny crack when I examined it. I know it is not from metal, I think if it...
    Thread by: DimaV, Jul 24, 2018, 8 replies, in forum: XJ Technical Chat
  20. kschroed91
    Thread

    FZ1 Engine in Seca II frame?

    Hello all. I have a 92 Seca II that was running before I stripped it down to get it road worthy and it's been sitting in storage. I saw a thread...
    Thread by: kschroed91, Jun 27, 2018, 2 replies, in forum: XJ Modifications
  21. thegeneralfuz
    Thread

    XJ 900R (aka: XJ 900 SECA): Engine Rebuild/Replacement

    I live in Tasmania, Australia and am on the hunt for parts to perform a full engine rebuild on my 1983 Yamaha XJ 900R (aka: XJ 900 SECA)....
    Thread by: thegeneralfuz, Apr 28, 2018, 12 replies, in forum: XJ Technical Chat
  22. Toomanybikes
    Thread

    Free Xj 750 engine etc

    In Bryson city NC have engine and big box of parts. Pm me for buddy's email
    Thread by: Toomanybikes, Nov 8, 2017, 17 replies, in forum: For Sale, Trade/Swap, Wanted
  23. docalexx
    Thread

    Cold engine starting problem

    Hello everyone. I'm proud to be new owner of Yamaha XJ700N Maxim 1985 (for Canada, thanks to the thread I've read on this forum!). This is my...
    Thread by: docalexx, Jun 19, 2017, 15 replies, in forum: XJ Technical Chat
  24. Jayduncs
    Thread

    Syncing engine

    Good morning all. Just joined the forum, and first time posting so I hope it's in the right section. I just bought am 85 maxim xj700. It wouldn't...
    Thread by: Jayduncs, May 11, 2017, 3 replies, in forum: XJ Technical Chat
  25. Proar
    Thread

    Engine split. Should it be done

    Sup xj Im standing in a dillema here, and it all starts out with me wanting to paint the engine. I was told to split the engine completly and yes...
    Thread by: Proar, Apr 29, 2017, 6 replies, in forum: XJ Technical Chat
  26. Ben Walker
    Thread

    Xj 600 frame engine carbs and more !

    Ok so i have all per diversion; An xj600 engine and carbs 2 frames 1 is newly painted with few scuffs 2 sets of forks 1 already attached to...
    Thread by: Ben Walker, Apr 9, 2017, 8 replies, in forum: For Sale, Trade/Swap, Wanted
  27. petebrusch
    Thread

    Got her going today, now to fix the little things...

    After swapping the motor from the parts bike, I'm proud to say I have a motorcycle once again! Now there's a few things here and there that I...
    Thread by: petebrusch, Apr 5, 2017, 11 replies, in forum: XJ Technical Chat
  28. petebrusch
    Thread

    First post/engine rebuild question

    Hello everyone, I've had two '82 Seca 550's since June of '16. I've worked on cars for almost my whole 22 years on this planet but this is my...
    Thread by: petebrusch, Mar 26, 2017, 14 replies, in forum: XJ Technical Chat
  29. Jon D
    Thread

    Need help seized engine

    Hey all, long time lurker first time poster, a while back I nabbed a Seca 650rj for 25 bucks and have set to work getting it going again, the...
    Thread by: Jon D, Feb 8, 2017, 8 replies, in forum: XJ Technical Chat
  30. Justin Ash
    Thread

    1983 XJ650 Won't rev past 4k

    I recently did a bit of an overhaul on my old xj. Rebuilt starter, new 4-1 Mac Exhaust, changed to K&N pod filters, new plugs, oil, after all this...
    Thread by: Justin Ash, Aug 22, 2016, 26 replies, in forum: XJ Technical Chat
  31. adamcastro
    Thread

    81 xj750rh seca cylinder interchange

    looking for someone who knows if 81-83 maxim and seca cylinders interchange i have looked and they are different part numbers 562-11101-00-00 for...
    Thread by: adamcastro, Aug 18, 2016, 13 replies, in forum: XJ Technical Chat
  32. craiygxj
    Thread

    New Member, First Post, High Rev when opening throttle '82 XJ650 Maxim

    How's it going everyone, first time poster here and a new owner of an '82 XJ650 Maxim. Acquired the bike from a friend where it had been sitting...
    Thread by: craiygxj, Aug 7, 2016, 17 replies, in forum: XJ Technical Chat
  33. Proar
    Thread

    Custom tank and service question

    hey xj'ers so i got around to taking the tank of today. easier than i thought. but i was planning on welding my own tank together, im going for a...
    Thread by: Proar, Jun 25, 2016, 1 replies, in forum: XJ Modifications
  34. wrenchmonkey
    Thread

    Pulling head off.

    To pull the head off the xj750 engine, do I need to break the chain?
    Thread by: wrenchmonkey, Dec 9, 2015, 4 replies, in forum: XJ Technical Chat
  35. wrenchmonkey
    Thread

    Oil Pump Chain

    The oil pump chain on my 1981 XJ750RH (Seca) has some slack in it. How much slack is too much?
    Thread by: wrenchmonkey, Dec 4, 2015, 3 replies, in forum: XJ Technical Chat
  36. robvoisea
    Thread

    1981 XJ 550 Seca -- Engine Rebuild

    It happened, a couple of months ago, I am coming home from work and I noticed that beyond 60 mph, acceleration was pretty sluggish and at there...
    Thread by: robvoisea, Nov 21, 2015, 13 replies, in forum: XJ Technical Chat
  37. Mustang
    Thread

    Engine gasket overhaul

    I'm starting my winter project of fixing my leaks and replacing all the factory gasket materials heads included and fi e tuning my new slimmer...
    Thread by: Mustang, Nov 9, 2015, 0 replies, in forum: XJ Technical Chat
  38. Ky13harbor9
    Thread

    Rubber Bits

    Hi all, It's goofy haphazard me again, I just wanted to find out what these little rubber bits are that are wedged between the cooling fans all...
    Thread by: Ky13harbor9, Sep 24, 2015, 6 replies, in forum: XJ Technical Chat
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