Post by: schrocketeer on March 30, 2024, 02:46:43 PM
The idea is to direct heat with a steel pipe/duct, from a heat gun that can output 300 degF, or 600 degF, on to the Starter gear that engages the Primary gear on the crankshaft.
My project '85 K100RT has not been started in multiple years.
I have rebuilt and bench tested the Starter. After re-install, the Starter just free-spins without engaging the sprag.
After trying the pop the clutch rolling backwards in 3rd gear a good 30 times, I decided to try a bump-start. Since my driveway did not have the angle/distance to get my Brick up to speed, this week I loaded it up, and went to a hill where I could hit 35 mph (tested with another bike, rolling in neutral).
Feathering out the clutch in 2nd, the engine turned over some, but not even a cough or bark of running. Fuel pump did come on with the key. Also tried hitting the Starter button a couple of times on my downhill roll. Battery load tested, and fully charged.
New fuel filter. Fuel rail cleaned. Fuel injectors cleaned and tested. Half tank of 93 octane fuel, around 2 weeks old.
Spark plugs checked.
Yes, I had the walk of shame, up the hill, to get my truck and trailer, to drive it back down and load the non-running Brick. I had been hoping it would start, and I would ride it back up the hill. :-(
Post by: daveson on March 30, 2024, 05:42:32 PM
Post by: daveson on March 30, 2024, 06:37:57 PM
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Post by: The Mighty Gryphon on March 30, 2024, 10:20:53 PM
The markers need to be aligned as in the photo.IMG_20240331_092607.jpg (27.4 kB . 432x576 - viewed 257 times)
+1
You wouldn't be the first person to put the starter together wrong. I have beaten you to that honor.
Post by: schrocketeer on March 31, 2024, 05:20:37 PM
The attached photo shows the heat pipe setup I tried last night, to focus heat gun on to the starter clutch.
Post by: daveson on March 31, 2024, 05:38:26 PM
Post by: The Mighty Gryphon on March 31, 2024, 06:15:49 PM
If the sprag freewheels CCW when you reach into the engine case, then the starter would need to turn cw when you look at it from the front. Can you confirm that?
If I understand the situation correctly, the problem started after you rebuilt the starter.
Post by: Laitch on March 31, 2024, 06:19:39 PM
Regarding the starter assembly: I'll now try a diagram :laughing4-giggles: to supplement Mighty Gryphon's observation.
(https://www.motobrick.com/gallery/4/1601-310324181101.png)
Post by: Chaos on March 31, 2024, 08:40:31 PM
Post by: The Mighty Gryphon on March 31, 2024, 10:32:55 PM
I have rebuilt and bench tested the Starter. After re-install, the Starter just free-spins without engaging the sprag.
Did the starter turn the engine before you rebuilt it?
Post by: Laitch on April 01, 2024, 02:33:22 AM
Since my driveway did not have the angle/distance to get my Brick up to speed, this week I loaded it up, and went to a hill where I could hit 35 mph (tested with another bike, rolling in neutral). Feathering out the clutch in 2nd, the engine turned over some, but not even a cough or bark of running.Popping the clutch in third or fourth gear around 20mph should have lit it up if the fuel, plugs, and timing were good. Feathering was polite but not brutal enough. :laughing4-giggles: Persist. Running with it will build leg strength and endurance!
Post by: frankenduck on April 01, 2024, 02:55:12 AM
My project '85 K100RT has not been started in multiple years.
Fuel pump did come on with the key.
This is not how a K100 is supposed to work. The fuel pump should only get power when the engine is turning while starting or running. (As detected by the Hall Effect Sensor.)
Post by: schrocketeer on April 01, 2024, 09:57:17 AM
Thanks for the tips all. I'll swallow my pride, pull the Starter, and confirm turning direction.
New cross-fit training routine. Push a 500+ lb bike uphill. :-\
Post by: schrocketeer on April 01, 2024, 12:44:20 PM
At this point, I would be happy to have the non-starting be due to my literally backwards mechanic'ing, so I can get my Brick on the road again.
Post by: Laitch on April 01, 2024, 12:48:12 PM
New cross-fit training routine. Push a 500+ lb bike uphill. :-\Birmingham's the home of Vulcan the Ironman so inspiration certainly isn't lacking, despite his going downhill some the last six years. :laughing4-giggles:
Hmm, the metal indentations on the starter body/cylinder (attached photo) do Not look exactly like the correct-example photo above.Bring on the photos!
Post by: The Mighty Gryphon on April 01, 2024, 01:47:20 PM
Post by: daveson on April 01, 2024, 03:48:24 PM
Edit: Added arrows to the photo. There's one indentation at the top and two on the bottom, it should be the other way around
Post by: daveson on April 01, 2024, 03:57:43 PM
I'll swallow my pride, pull the Starter, and confirm turning direction.
There's no pride lost in asking for help. We non mechanic riders (which most of us are) can take pride in giving it a go even if we don't fix it, but I think you'll fix it to boot.
Post by: schrocketeer on April 15, 2024, 03:38:27 PM
Thanks for help everyone. :-)
Now to work on the backfiring. I'll research the site more, then possibly start a new thread for that discussion.