Author Topic: Kick start locked/frozen  (Read 196 times)

0 Members and 1 Guest are viewing this topic.

mitchell

  • Scooter
  • **
  • Posts: 86
  • Karma: 0
on: October 11, 2021, 08:10:19 pm
Hi all.
  My bike , 1972 350 bullet, had issues in June, so I had to do my road trip by car. Just got back and trying to address the issue.  The bike  ran, died. I replaced some parts including the decompressor.  It ran beautifully for about 20 minutes. Idling, I heard some "crunch" /mechanical sound and it just died. I left the next morning with the car.

Three months later to now...

   Thought it might be the push rods/tappets, so today I opened the cover and...they are spinning perfectly. So, it ain't them.
   Bike is in neutral but the kicker is "stuck".

  What would be the next plan of action?

 I thought about the kicker spring but I don't think that the spring would create the sound I heard when it died.
Horror  of horrors, could it be a frozen piston, or the gear box?
I am out of my element if so and out of money to get a pro mechanic who knows these bikes.

Any help will be really appreciated
Thank you,
 Mitchell


anything can happen.
1972 350 Bullet Standard


cyrusb

  • Kept man
  • Grand Gearhead
  • *****
  • Posts: 3,402
  • Karma: 2
  • Theres a last time for everything
Reply #1 on: October 11, 2021, 09:01:31 pm
Pull in clutch and operate kicker. If it moves its not the gearbox.
 Next I would remove the primary cover and try to rotate the crank.
  That should do it.
2005E Fixed and or Replaced: ignition, fenders,chainguard,wires,carb,headlight,seat,tailight,sprockets,chain,shocks,fork springs, exhaust system, horn,shifter,clutch arm, trafficators,crankcase vent.


tooseevee

  • Grand Gearhead
  • *****
  • Posts: 3,914
  • Karma: 1
  • A Simple Twist Of Fate
Reply #2 on: October 11, 2021, 09:37:17 pm
Hi all.
 The bike  ran, died. I replaced some parts including the decompressor.  It ran beautifully for about 20 minutes. Idling, I heard some "crunch" /mechanical sound and it just died. I left the next morning with the car.

   Thought it might be the push rods/tappets, so today I opened the cover and...they are spinning perfectly. So, it ain't them.
   Bike is in neutral but the kicker is "stuck".

  What would be the next plan of action?

 I thought about the kicker spring but I don't think that the spring would create the sound I heard when it died.
Horror  of horrors, could it be a frozen piston, or the gear box?
I am out of my element if so and out of money to get a pro mechanic who knows these bikes.

Any help will be really appreciated
Thank you,
 Mitchell

           Oooh Bummer!

            I'd look into the combustion chamber first.

           This is just a SWAG and I'm guessing it ate a valve or part of the decompressor. But it should still turn over? Just guessing remember.
     
           I hear there are tiny borescopes now that plug right into your telephone. Who'd believe it? :)  Whatta world  ;)
'08 Black AVL Classic.ACEhead 9.8:1/manifold/canister. TM32/Open short bottle/hot tube removed. Pertronix Coil. Fed mandates removed. Gr.TCI. Bobber seat. Battery in right side case. Decomp&all doodads removed. '30s Lucas taillight/7" visored headlight. Much blackout & wire/electrical upgrades


Bilgemaster

  • Just some guy
  • Global Moderator
  • Grand Gearhead
  • *****
  • Posts: 2,755
  • Karma: 0
  • 2005 Bullet 500ES in "Mean Green" Military Trim
Reply #3 on: October 12, 2021, 02:49:18 am
Pull in clutch and operate kicker. If it moves its not the gearbox.
 Next I would remove the primary cover and try to rotate the crank.
  That should do it.

I don't know about "that should do it", but our man 'Cyrusb' offers the easiest way and place to start looking for the culprit. A broken primary chain or something else jamming up or otherwise awry with the clutch assembly in that primary case might  cause the symptoms you describe. You would do well to hope  it's just something goobed up in there, since it's likely to be the easiest and cheapest of the other more dismal possibilities to fix--only minor surgery hopefully.

But indeed, it COULD be something a bit more dreary and major like a banged up or dropped valve, fragged piston, thrown crank or some other more internal mayhem. And I'm more than a little concerned and leery that you wrote, "I replaced some parts including the decompressor". After all, a dropped decompressor valve or other bits of its assembly fallen in there wouldn't do your bike's guts any favors. So, if pulling the primary cover doesn't reveal some hopefully relatively easy to mend problem, and you want to peer in there, here's a bunch of little cheapo endoscopes or borescopes from Amazon that'll plug into Android phones, arranged by price low to high: https://www.amazon.com/borescope-android-phone/s?k=borescope+for+android+phone&s=price-asc-rank&qid=1634002682&ref=sr_st_price-asc-rank. Wallyworld also sells similar for less than like a case of Bud.
« Last Edit: October 12, 2021, 02:54:50 am by Bilgemaster »
So badass my Enfield's actually illegal  in India.

 


Willbrunei

  • Born (eo) again biker
  • Bulleteer
  • ***
  • Posts: 128
  • Karma: 0
  • 2007 Bullet 500 ES Military
Reply #4 on: October 12, 2021, 03:15:00 am
I had kickstarter problems on my 500 bullet. It was the kickstart shaft that had fractureddue to a kickback and jammed pawl. I know yours is a 4 speed but could be a similar issue?
So far I have: removed electric start, removed panniers and crash bars, fitted Lycette seat and short silencer, rejetted carb, fitted pancake filter, rebuilt kickstart mechanism, replaced snapped clutch cable, fitted Lucas stop light, fixed headlight short ....


mitchell

  • Scooter
  • **
  • Posts: 86
  • Karma: 0
Reply #5 on: October 12, 2021, 03:01:35 pm
Thanks. I had replaced the clutch plates, the primary gasket and decompressor back in June. It all looked fine and ran perfectly... for ten minutes. I will pull the primary cover and have a look-see. If it all looks fine,  then the problem will be something really bad?
If the kick spring had broken  am I correct in thinking the kick start would be totally free? ie. no tension at all.
I will get back to you.
Thanks much
« Last Edit: October 12, 2021, 03:04:01 pm by mitchell »
anything can happen.
1972 350 Bullet Standard


cyrusb

  • Kept man
  • Grand Gearhead
  • *****
  • Posts: 3,402
  • Karma: 2
  • Theres a last time for everything
Reply #6 on: October 12, 2021, 04:41:35 pm
Can you kick it through with the clutch pulled?
 You're on the right path, removing the primary should tell a lot.
 A basic rule of thumb when trouble shooting and a good place to start is to go back to the last thing you did.
 
2005E Fixed and or Replaced: ignition, fenders,chainguard,wires,carb,headlight,seat,tailight,sprockets,chain,shocks,fork springs, exhaust system, horn,shifter,clutch arm, trafficators,crankcase vent.