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 Post subject: removing swingarm
PostPosted: Sat Dec 19, 2015 7:17 pm 
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Joined: Mon Oct 12, 2015 5:18 am
Posts: 27
Location: Netherlands
model: 907 I.E.
year: 1990
Trying to remove the swingarm axle bolt. The nut is off, the axle wont budge. Is there something else that is clamping the bolt or does it just need more brute force?
cheers J


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 Post subject: Re: removing swingarm
PostPosted: Sat Dec 19, 2015 8:24 pm 
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paso grand pooh-bah
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Joined: Wed Dec 05, 2007 12:35 am
Posts: 1668
Location: Newzealand
model: 906 Paso
year: 1990
Probably rusted into the bush ( that the needle rollers run on ) on the left side . I had to beat mine out with the log splitter ( BF hammer ). I laid the whole bike on its side and supported frame around the pivot bolt hole ( with lumps of firewood ). Put heaps of CRC WD40 around it for a day or so and have a go. Try not to damage the pivot bolt ..... I used an axle bolt out of something as a long drift. If you try to rotate the pivot bolt it will spin easily as its spinning the bush as well , so that really only leaves you with beating the shit out of it.

You got your swing arm out yet Fraser ? :)

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 Post subject: Re: removing swingarm
PostPosted: Sun Dec 20, 2015 8:57 pm 
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Joined: Tue Jan 17, 2006 12:00 am
Posts: 329
Location: Lower Hutt, New Zealand
model: 750 Paso
year: 1986
Hamish,

New swing arm installed, new WOF, even rode it into work this morning. Need to get some exercise on it before the Boxing day races at Wanganui.
Cheers,

Fraser.

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 Post subject: Re: removing swingarm
PostPosted: Mon Dec 21, 2015 9:54 pm 
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paso grand pooh-bah
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Joined: Wed Dec 05, 2007 12:35 am
Posts: 1668
Location: Newzealand
model: 906 Paso
year: 1990
Image
This pic shows the needle rollers and the bush on the left side of the swing arm
Image
This pic is the ball bearings and spacers on the right side of the swing arm . It could also be rusted into this spacer/bush . The bush and bearings on the right side are what locates the arm end float (side to side on the bike ) and the needle rollers on the left just sorta sit where ever they need to . :)

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 Post subject: Re: removing swingarm
PostPosted: Mon Dec 28, 2015 7:26 pm 
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paso grand pooh-bah
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Joined: Sat Sep 03, 2005 12:00 am
Posts: 1322
Location: SF Bay Area
model: 750 Sport
year: 1990
Nice pics. Don't forget the silly little set screw that holds that aluminum spacer in place.
I have mine apart on the bench currently also. Sure is an expensive way to make a pivot (one of the reasons the Paso line went out of production) Later models, like the ST, were much simpler, cheaper, and easier to fix/repair.

Cheers, Phil

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1991 907 -mostly stock
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 Post subject: Re: removing swingarm
PostPosted: Mon Dec 28, 2015 8:10 pm 
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paso grand pooh-bah
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Joined: Tue Jul 29, 2008 9:50 pm
Posts: 3202
Location: Hilltown,Pennsylvania
model: 906 Paso
year: 1990
early designs rely on whats available in the parts chain. It takes time to develop a new supply of parts to improve on the concept as new tooling is both expensive and time intensive

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If it ain't broke keep fixin it till it is
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 Post subject: Re: removing swingarm
PostPosted: Sat Jan 02, 2016 6:35 pm 
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Joined: Mon Oct 12, 2015 5:18 am
Posts: 27
Location: Netherlands
model: 907 I.E.
year: 1990
Best wishes for 2016 to all.
Thanks for the info and pics. I got the bolt out with a bigger hammer.
I was going to renew some of the bearings to reduce the free-play but I think I will be looking for a Alu-welder now.
The PO probably never ajusted the chain tension. The chain has chewed through the swingarm on the bottom side, all the way to the rollers and ground out a weld on the top side. Anyone got a good swingarm going?
Cheers J


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 Post subject: Re: removing swingarm
PostPosted: Sat Jan 02, 2016 6:57 pm 
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Joined: Mon Oct 12, 2015 5:18 am
Posts: 27
Location: Netherlands
model: 907 I.E.
year: 1990
looks like this;


Attachments:
907 swing2.jpg
907 swing2.jpg [ 36.07 KiB | Viewed 3343 times ]
907 swingarm1.jpg
907 swingarm1.jpg [ 30.14 KiB | Viewed 3343 times ]
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 Post subject: Re: removing swingarm
PostPosted: Sat Jan 02, 2016 11:17 pm 
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paso grand pooh-bah
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Joined: Wed Dec 05, 2007 12:35 am
Posts: 1668
Location: Newzealand
model: 906 Paso
year: 1990
Mine was similar , just not ground right thru to the bearing .I think the swing arm in my pic was the one I sent to Fraser ( which was dumb coz its better than the one on my Paso :lol: ) I just made a new chain slider that went right round the pivot , just a 30mm wide strip of nylon strap 5mm thick , heated up and bent round the swing arm and pop rivoted on ................then I found some new Ducati chain sliders.
Beats me , if you run the chain anything like slack enough to do such damage the gear changes are real bad and that alone would make me want to tension the chain properly ...............but then I have heard of people blissfully riding round with their sprocket bolts cutting their swing arm in half :D ...........not looking towards anyone in particular :lol:

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 Post subject: Re: removing swingarm
PostPosted: Wed Jan 27, 2016 8:50 pm 
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Joined: Mon Oct 12, 2015 5:18 am
Posts: 27
Location: Netherlands
model: 907 I.E.
year: 1990
I took the swingarm out with the intention to cure the play on the lever system.
After cleaning and checking I put it back together to see which of the needle bearings/bushings needed replacing. What did I find, no play at all. Conclusion, the play I felt before was not in the bearings but the bolts through the bearings. These need to be very tight to prevent movement of the bushing on the bolt. Clamping force needs to keep the bushing in place. I have checked this on 2 other 907's, same issue, one also cured by tightning the bolts, (I own 2, the other was at a dealer)
My tip, put the bike on the centre stand, grab the end of the swingarm and pull up. If there is about a cm of free movement you probably have the same issue, tighten all the bolts and the ride quality will improve a lot.
What I also found on all three 907's I checked, the rear shock didnt work.. The two I checked had zero pressure where they need 6 or 7 bar in the canister. Pumped then up and found another huge improvement in ride. Only problem now is that they loose pressure over time. Anyone know the cure for that?

Happier with the 907's every day.
Cheers J


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 Post subject: Re: removing swingarm
PostPosted: Thu Jan 28, 2016 9:33 am 
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paso grand pooh-bah
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Joined: Thu Nov 03, 2011 10:13 am
Posts: 670
Location: Scotland
model: 907 I.E.
year: 1994
jjw wrote:
... the play I felt before was not in the bearings but the bolts through the bearings. These need to be very tight to prevent movement of the bushing on the bolt. Clamping force needs to keep the bushing in place.

For anyone with an ST2/3/4 they suffer the same problem. If the bolt clamping the rocker pivot to the frame isn't tight enough the bearing sleeve moves on the bolt, resulting in about 10 - 15mm of free play at the rear wheel.

This post reminds me too that I must check the pressure in my rear shock ore often.

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