bump start


Information and questions on GL1200 Goldwings (1984-1987)
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crispy1
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Joined: Fri Aug 19, 2016 5:57 pm
Location: Edmonton,AB, Canada
Motorcycle: 1985 GL1200 LTD

bump start

Post by crispy1 »



I am new to Gold Wing driving. Have been given an 85 LTD and need to bump start. Was told to bump from 2nd. How fast do you need to get to Vs bumping from 1stÉ



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Viking
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Re: bump start

Post by Viking »

It has nothing to do with speed. In first gear, you will come to a stop before the engine turns over enough to start. That is the reason for push starting in a weaker gear. I have even heard of push starting in third or fourth. Personally, I have never push started a motorcycle, although I have done it with cages. Higher gear, but still need the same speed. A nice hill is the best tool for this.
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aj1500
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Re: bump start

Post by aj1500 »

I have had to push start both my 1200 and the 1500 in the past, I found 3rd is the best gear to use but 2nd will work, just takes a little more speed to account for the torque of 2nd

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brettchallenger
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Re: bump start

Post by brettchallenger »

why do you need to push start? Is it a dead battery or problem with starter motor?
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crispy1
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Joined: Fri Aug 19, 2016 5:57 pm
Location: Edmonton,AB, Canada
Motorcycle: 1985 GL1200 LTD

Re: bump start

Post by crispy1 »

starter not engaging as bike has been sitting for awhile. Have changed oil, added Seafoam, put in new battery, starter just spins

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brettchallenger
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Re: bump start

Post by brettchallenger »

Ah, in the old days you could have just hit it with a hammer.
“Socialism always begins with a universal vision for the brotherhood of man and ends with people having to eat their own pets.”

crispy1
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Re: bump start

Post by crispy1 »

did have the rubber mallet ready though....LOL

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Rednaxs60
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Re: bump start

Post by Rednaxs60 »

Have had starter issues as well, but the engine always turned over. I replaced my original OEM starter in December because it would run on after starting the bike. Replaced the starter with new and it worked better, but it stopped working two weeks ago. Put the original back in and all is well. There was a manufacturing defect in the new starter that has been fixed under warranty.

Had the engine out in June and did the clutch and other work including replacing the springs, rollers and pins on the starter clutch.

If the starter is spinning and the engine is not turning, there could be two possibilities. One, the starter clutch is not engaging, or the starter chain is broke. The latter is probably not the cause, but this can be determined by removing the starter and inspecting the starter gear and chain. Once the starter is out, you should also be able to turn the starter chain one way but not the other. If the starter chain turns both ways there is a problem with the starter clutch. If the starter clutch does not turn, issue as well.

Problem/issue with the starter clutch will require engine removal.

Here is a picture of the internals for the starter, starter chain and starter clutch that forms part of the alternator assembly. In this picture you can see how the starter is connected and the starter chain runs up in behind the alternator assembly (rotor portion). With the starter disconnected from the sprocket you should be able to turn the chain one way but not the other (forget which it is).


Here is a picture of the internals with some comments.


Hope this helps.

Cheers
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crispy1
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Re: bump start

Post by crispy1 »

will look into it, thanks. Great to hear from my hometown

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Re: bump start

Post by roadwanderer2 »

Rednaxs is correct. unfortunately to get to the starter clutch the engine has to be removed from the bike and the rear engine cover has to be taken off the motor. i have the same problem with my 86 SEi and in about a week or so im starting the process of removing the engine from the frame. found all of the parts on eBay, and while i have the motor off, im replacing the timing belts, clutch friction plates, stator and rebuilding the clutch slave cylinder. no sense in removing the motor and exposing these other parts and not changing them out while i have the motor on a bench. this should insure at least another 60-80,000 trouble free miles...hopefully.

stuart.

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Rednaxs60
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Re: bump start

Post by Rednaxs60 »

An exploratory to see if there is an internal issue by removing the starter will require you to remove the lower fairings, drop the exhaust, loosen off the engine guards to get enough clearance to drop the exhaust far enough and removing the rear right exhaust manifold bolt (the one right beside the starter). Takes about an hour (I have renewed all the studs and nuts - new is always nice) to take the starter out.

Good luck. PM sent as well.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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HALBUDD
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Re: bump start

Post by HALBUDD »

I have read other posts of riders having the same problem, the sprog gets all gummed up as it does not get a good oil flow. I would try putting seafoam in your oil and running the bike for about 100 miles just dont run it hard. This will get the gum out of the starter sprog. Change your oil after you run it you will see a lot of gunk coming out with your old oil. As you said it was setting for awhile. just something I read somewhere.---------------------------------Hal
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Rednaxs60
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Re: bump start

Post by Rednaxs60 »

Tried the sea foam in the oil before I removed the engine. I did not notice a difference. When I removed the engine and the starter clutch, I found it was very clean. I have since replaced the springs, rollers and pins in the starter clutch, and with the original starter in place, no more carry on by the starter clutch and it engages first time, every time so far. The small springs, much like a ball point pen spring (one fellow here in Victoria used ball point pen springs in place of the OEM springs and it worked well apparently) have to adjust to the heavy roller and can wear over time. If you do remove the engine, I'd replace these three items in the starter clutch.

Cheers
"When you write the story of your life, don't let anyone else hold the pen"

Ernest

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dingdong
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Re: bump start

Post by dingdong »

You do need to get the engine running in order for the Seafoam to do it's work. More than likely the sprag clutch is gooped up from sitting.



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