Starter grinding when hot!
Tourer
Joined: Jan 2014
Posts: 353
Likes: 32
From: New Brunswick Canada
Rusty agreeing to disagree is fine by me. Hell we may both be way off base but I think there's some validity to both sides. I do still believe it's fuel related though. I went through 2 high dollar starters on my drag car years ago for this same reason. I finally realized that if I took the electric fuel pump and put it on its on switch the vapor locking issue went away. Crank the motor over till it's turning good the hit the fuel pump switch and it would bust off perfect every time. I know this is an apples to oranges comparison but the common factors were a hot motor and high compression.
Makes sense to me, as does Ripsaw's explanation with the fuel being drawn in as the motor is rolling to a stop after shutting it off causing pressure to build when it's hot.
Like you said SBates probably a bit of both, I do know this though the answer or part of it at least is definitely ACRs.
I have a 15 RGS now, nothing done to it but it starts so easily no matter if it's hot or cold.
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,536
Likes: 6,411
From: Honah Lee
If you see the injectors leak by peering into throttle body when you key on for the run of the fuel pump, they should be replaced.
There is 60+ pounds on pressure on the rail. If the injectors leak even a few drops, it could fill the intake with raw gas after setting for a while. You do not want that. That would wash the cylinders and cause extreme wear on start up.
It should not matter waiting on the system check lights to go off. I have heard that a lot, especially from people with piggy back in line tuners.
The pressure on the fuel rail will drop off in 24 hours but it's reward back thru thru fuel pump.
There is 60+ pounds on pressure on the rail. If the injectors leak even a few drops, it could fill the intake with raw gas after setting for a while. You do not want that. That would wash the cylinders and cause extreme wear on start up.
It should not matter waiting on the system check lights to go off. I have heard that a lot, especially from people with piggy back in line tuners.
The pressure on the fuel rail will drop off in 24 hours but it's reward back thru thru fuel pump.
Stellar HDF Member
Joined: May 2015
Posts: 2,095
Likes: 304
From: mid Michigan
My thought is they don't keep leaking once fuel pressure is up, just at first to get enough like Bates happens on dragster. Some don't leak at all like when new. I do notice on my 88 it fires instantly & hot takes a couple turns when I wait for light to go out. I just installed a starter I picked up for $5 at end of swap meet. My original still works, setting as s spare. This is a stock 88 so it's not killing the starter or comp, but like said it takes more effort. So will be trying Bates method, cold start wait, hot fire it up.
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Retired Admin
Joined: Jul 2006
Posts: 21,865
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From: Wisconsin
For the OP, do you still have the factory compensator? Before the 11s came along, the compensator was not up to the job for the 96" engines and would run out of travel when the starter engaged slamming the engine into rotation. This shock "reflected" back against the weakest part, the starter clutch. The weak compensator slowly destroys the starter clutch. With CRs, you may have a way out but for most, the new starter clutch will again be destroyed by the compensator slamming against full travel. Do you often get a loud "crack" or bang as you hit the starter? That is the weak compensator. The long term fix is to replace both the compensator and the starter clutch at the same time. Only the SE style compensator is available from Harley now, no service parts for the old style comp. The additional PITA is that the new compensator is not compatible with the old rotor so a new rotor must also be purchased separately now. They are not just sticking it to you with a lame story, it is true. I changed my compensator for the SE type on my 08 Road king and replaced the started clutch at 15,000 miles. I have over 80,000 now with no further starter grinding. I am well pleased with the AllBalls starter drive assembly (contains the clutch).
Seasoned HDF Member
Joined: Mar 2010
Posts: 38,536
Likes: 6,411
From: Honah Lee
Sarpeeze got back with an answer in his case as to the problem which was the actual gear had a huge flat on the end of the gear. What caused the ring gear to make that flat is still in limbo.
https://www.hdforums.com/forum/dyna-...mpensator.html
https://www.hdforums.com/forum/dyna-...mpensator.html
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Cazimere
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Feb 11, 2015 12:06 AM
