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An Aussie 1VJ Rebuild/Restoration

Posted: Sun Mar 13, 2016 6:13 am
by Colj500
Way back in 2011 while at Arkaroola for the inaugural Tenere Tragics Run, I meet John from Darwin. Over a few beers it came up that he had a rather sad 1VJ in his shed. I said that I was interested, and so began a 5 year process of getting the bike from Darwin down to my place near Clare in SA.

As this year (2016) Tenere Tragics River to Ranges Run was to be held primarily in SA, John loaded both his 1999 660, and the poor old 1VJ into the back of his ute, and last Thursday (3rd March 2016) after 5 long years I finally had my 1VJ.

Oh what a sad sight it is;

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As can be seen it is fairly complete, but in a rather poor weather worn condition. According to John, he picked it up from a farm near Darwin where it had spend over 15 years parked beneath a tree. The front brake was seized and the caliper had to be pry off of the disc to move it. The engine would not turn over using the kickstarter, and he suspected that it had had water in the engine and it would be pretty well knackered. Althought the fuel tank looks ok, and has no dents, it has more holes than a colander, and could present a real challenge to my friendly tank restorer.

Anyhow, yesterday morning, after finishing a great ride on the River to Ranges Run on Friday, I decided to have my first good look at my newest project bike. I poped the clutch cover to see if the engine had had water inside, and to my suprise, 4L of uncontaminated oil drained oil into my catch tray. With a spanner on the crank nut I was ably to turn over the engine fairly easily, so it looks like there may just be a problem with the kickstart mechanism / gears.

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I refitted the clutch cover without doing much more in the way of investigation the kickstart problem, and I have sprayed everything in penetrating oil in preparation for a full tear down. This is not going to be a project that will be completed anytime soon, as I have several other projects in progress. I don't intend to restore / rebuild it back to perfectly original condition. One major mod that will occur is the fitting of a disc rear brake assy, as I have a wrecked 1992 XT600 in the back of my shed, so I already have all the necessary bits on hand.

I will post some updates as progress is made.

CJ

Re: An Aussie 1VJ Rebuild/Restoration

Posted: Sun Mar 13, 2016 7:19 am
by jibber
Good luck, keep the info coming :goodjob:

Re: An Aussie 1VJ Rebuild/Restoration

Posted: Sun Mar 13, 2016 8:52 am
by Mezo
:popcorn2:

Mez.

Re: An Aussie 1VJ Rebuild/Restoration

Posted: Tue Mar 29, 2016 8:00 am
by Colj500
With the wife working away over the Easter holidays, I tried for a bit of an Easter miracle yesterday (Easter Monday), and attempted a resurrection by getting the 1VJ's engine running. Unfortunately, I didn't have much luck and ran into a few issues.

Issue 1 - Ignition wiring - very week spark.

After initially sorting out the issue with turning the engine over via the kick starter (see issue No.2) and doing some basic mechanical checks like setting the tappet clearances etc, I started to have a look at the electrics and ignition. Things looked quite promising and kicking the engine over gave a reasonably healthy spark at the spark plug. I left the electrics at that, and proceeded to removed the carbies and fit a set from a later XT600 that were in better condition (slightly cleaner) that I thought should be good enough to get the engine running. Unfortunately, once I had the carbies fitted the spark that I previously had, had disappeared. Although there was no spark visible, doing a "finger test" I could feel a very week voltage at the spark plug when I gave it a decent kick. As I don't have a manual for the bike, I downloaded the wiring diagram for the 3AJ from the forum, as I suspected that it would be similar and I could at least use it as a starting point, and hopefully with it and 40 odd years experience in the electrical / electronics industry I would be able to nut things out.

Well, after many hours and a lot of failed theories, I was getting nowhere. I then found a circuit diagram on the net, reputed to be of a XT600 CDI unit. With this diagram, and another CDI unit from the wreck of a 1988 XT600 that has been lurking in the back of the shed for some years, I started to test the CDI unit on the bike. After a while it was starting to look like the CDI on the bike had failed. I still can't workout why it had spark initially then failed, it will remain one of lifes great mysteries. So, out with the side cutters and crimping pliers and the existing plugs were cut off and the wiring altered to accept the 1988 XT600 CDI unit. First kick with the "new" CDI and there was spark :yess: Many many kicks later, it still hasn't run, but it has sounded close, including one very loud back fire that resounded through the shed so loud that I though the neighbors would be calling the police to investigate a shooting.

Next step will be to remove the carbies and give them a really thorough clean out, and try and get the electric start working, as I am just not cut out for trying to kick the thing back into life. This leads to issue number 2.


Issue 2 - Starter clutch

As posted earlier, when I first got the bike a few weeks ago, it was assumed that the engine was stuffed / seized. After removing the clutch cover and finding everything looked reasonably OK, I was able to turn the engine over using a spanner on the end of the crankshaft. While I had the cover off I removed the plates from the clutch to free them off and while playing around checked that the kick start mechanism was OK and the the gearbox turned over OK. When I turned the crankshaft I I could hear the starter motor turning so I knew that the problem was on the LH side and not with the clutch or kick start mechanism

Yesterday, I pulled the alternator cover off and found that the Starter Ring Gear was "seized" in the free wheeling bearing on the alternator rotor. I disassembled the Starter Clutch assy, and as there were no obvious signs of anything broken or badly worn, I assumed that the ring gear was stuck/seized due to having sat for 20 odd years, as after cleaning the assembly with solvent it all appeared OK, i.e. it would lock when turned in one direction and free wheel when turned in the other direction.

Everything was OK, and I could kick the engine over, however later that morning while trying to kickstart the engine, the Ring Gear jammed/stuck in the free wheeling bearing on the alternator again. (Note, that I had not tried to use the electric start at any time). I remover the cover and rotor and freed up the ring gear again (it was jammed quite tightly), and again one freed up, would work perfectly on the bench while being turned by hand. After reinstalling the assembly I had another go at kicking over the engine, and it jammed again. This time I heard a distinct "clunk" as it jammed. It freed up momentarily, and then, with a "clunk" jammed again. I have currently removed the intermediate gear between the starter motor and the ring gear so that I can continue with trying to sort out my electrical / ignition issues.

So, the question is: Is there a recognised problem that causes the Starter Ring Gear to jam in the free wheeling bearing in the alternator rotor / flywheel?

An hints and/or suggestions greatly appreciated.

Re: An Aussie 1VJ Rebuild/Restoration

Posted: Fri Dec 06, 2019 11:17 am
by Spike
aaand there it ended in March 2016......or did it. How about an update :pleasesir:

Re: An Aussie 1VJ Rebuild/Restoration

Posted: Fri Dec 06, 2019 7:20 pm
by jibber
He has not been back for 2.5 years

Re: An Aussie 1VJ Rebuild/Restoration

Posted: Fri Dec 06, 2019 10:10 pm
by Mezo
jibber wrote: Fri Dec 06, 2019 7:20 pm He has not been back for 2.5 years
He`s been quiet on all forums, i think Noely knows him? (same neck of the woods).

Mezo.

Re: An Aussie 1VJ Rebuild/Restoration

Posted: Sat Dec 07, 2019 10:51 am
by Spike
I like the look of the Gearsack rack adapter on that, will need to find one