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Search results

  1. M

    Increased engine chatter - Decreased power

    Here is a more detailed video. At the point where the chain jumps it actually loses tension. So this combined with valve clearance and the sprockets being on the wrong cams would certainly lead to a lot of noise and poor running conditions? https://youtu.be/TRP12C6VG6k?si=Ac_iX5f09lkvnNt4
  2. M

    Increased engine chatter - Decreased power

    https://youtube.com/shorts/Uiz5H9-YqoI?si=fCr8ZxmtvIXT-pAA Here is another issue I found The chain hops as it meshes with the top idler gear. Definitely a source of noise.
  3. M

    Increased engine chatter - Decreased power

    Ok guys......I might be mistaken but is there something seriously wrong with this picture? Intake cam and ex are reversed. Now I know on some later models swapping cams can give you a boost, but that's usually swapping an intake in to the exhaust and keeping the existing intake in place. EDIT-...
  4. M

    Increased engine chatter - Decreased power

    Well upon measuring 2 of the valves...clearance has made its way up to 0.11mm on the intake side
  5. M

    Increased engine chatter - Decreased power

    Compression is good on this one for its age. 160, 155, 160, 165
  6. M

    79 and 80 model GS850G Engine part options

    Lobes are looking really good on both cams.
  7. M

    79 and 80 model GS850G Engine part options

    I believe the engines will be minimal work. This is more of a hobby build for me. I enjoy rebuilding engines and I'm keen to work on something more complicated that the si gle and twin engines I'm used to
  8. M

    Increased engine chatter - Decreased power

    Cam walk was present already. Definitely could be valves but the sudden power loss is the concerning part to me.
  9. M

    79 and 80 model GS850G Engine part options

    HI guys. I am going to rebuild both my GS850 G top ends over the next 12 months. The 79 kickstart model is probably going to be left until last, even though I prefer that motor and carb combo. Basically on both engines, I will be doing pistons, rings, valve springs, and valve lapping...
  10. M

    Increased engine chatter - Decreased power

    Hey guys. Went for an afternoon ride. The 80gs850 was running beautifully. Ride was about 2.5 hours. I stopped for fuel and noticed a lot more noise from the engine. I also noticed that power seemed to have dropped quite a bit. I'll check valves this weekend but it seems like a very sudden...
  11. M

    Ignition and charging system refresh.

    Maybe the MP-08 is the one.
  12. M

    1980 GS850 missfire

    Hey guys I took it for a longer run. Was stuttering like mad so turned around and went home. Unplugged the connection from the ignitor to the coils, cleaned the and reconnected and it ran really well. Almost perfect. I only had the stuttering at the top end, WOT. The bike felt like it was...
  13. M

    Ignition and charging system refresh.

    Secondary side ignition coils with caps reading at 22.1 and 22.7 Kohms. . Caps read 4kohms.
  14. M

    Ignition and charging system refresh.

    I agree that I probably don't need them all right now but almost all of them are the factory original parts. They also all test fine and the bike runs perfect for 30 mins to an hour before starting to show ignition issues. This has made it very difficult to pin point the actual fault as as soon...
  15. M

    Ignition and charging system refresh.

    Hey guys, I have a 1980 GS 850g. The accessory electrical system has been upgraded to an munit blue( this is how I bought it as a non-finished project) The ignition and charging system is unaltered however I have been having some issues as you may have seen in my previous post regarding both...
  16. M

    1980 GS850G trans or shaft hum

    You can see the difference gears here in the ultra sonic. Curious as to the application of each and reason for the difference
  17. M

    Can a bad ignition coil cause rough running at certain throttle position?

    Sounds similar to the issue I'm having. Bike runs great but when it gets hot it gets a serious missfire. 1980 gs850g
  18. M

    1980 GS850 missfire

    The caps are actually quite new. The leads are unfortunately fixed to the coils so I can't swap out the leads without swapping the coil. I feel the issue may lie elsewhere in the ignition system tho. Are there any new ignitors that suit? Pulled the plugs and they were jet black after an hours...
  19. M

    1980 GS850 missfire

    I just did a little test holding one of the spark plugs caps just off the plug and the bike ran smooth. Seating the plug cap correctly and straight away back to misfire.
  20. M

    1980 GS850G trans or shaft hum

    Just an update. I noted the gears on the existing part and replacement were slightly different. I reinstalled using the replacement gear, torqued it down to spec and the whine and moan is gone completely.
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