Rear fork and chain lubricator

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Hi

How much movement is normal in the horizontal side direction for the rear wheel (and fork),when it stands on the center stand (when you push it)?
I see this is a result of the rubber isolatics that the whole assembly is mounted on ,but i can push my rear wheel at least 1 cm each way ,and wonder if that is normal :?:

I also wonder if there is an automatic chain lubricator on my 72 roadster. The thing is that i have read that there should be one ,but i cant find any. Is the reason why my chain is so oily just oil-leaks :D hehe.
 
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:!: Depends what you mean by normal. It's certainly not correct but lots of them get that bad !

As a guide, if the movement feels "spongy" and rubbery then it is probably isolastics, but if it goes "clunk- clunk" then more likely swing arm pivot or loose engine mounts.

The amount of movement you should have depends on how strong you are. I have seen 6' (1m.80) Ministry testers grab the rear wheels of well set up Commandos and seen them move more than I would have thought possible.

I think you need to do some dismantling and investigation. The front Iso is the easiest place to start.

The chain oiler is fed from a "tee" on the return feed to the oil tank. Many of us have blanked them off due to the problem you describe.
 
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wear in the swing arm bearings or the gearbox cradle tube will cause movement. Mine is all in good nick & some small amount of spongy movement can be detected, but 1 cm seems a lot. If s/a spindle tube is worn oversize spindles can be bought, but on mine I made 2 clamps to crush the tube on to the swinging arm spindle. This uses surprisingly little force & makes a safer location than the 1/4 inch bolt in the centre. My tube wasnt worn, but i didnt want to ride the bike with the spindle fixed with just that piddly little bolt!. If you want more details let me know
 
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Sounds like a lot of movement to me!! If you do find out that it is swingarm rather than isolastics, I would recommend modifying your swingarm by welding nuts on to the cradle and threading in a bolt on both sides to stabilize (INOA fix??) or using lockring collars (easier). I used the latter and it worked great. My bike handles much better than before and I probably only had 2-3 mm of movement before I started. But first you probably should disassemble the swingarm to see if the bushings look excessively worn. I bought the lockring collars from Heinz Kegler in New Mexico. Very slick. Cost around 60 bucks. Please mail e offlist if you would like his coordinates.


fireflake purple said:
Hi

How much movement is normal in the horizontal side direction for the rear wheel (and fork),when it stands on the center stand (when you push it)?
I see this is a result of the rubber isolatics that the whole assembly is mounted on ,but i can push my rear wheel at least 1 cm each way ,and wonder if that is normal :?:

I also wonder if there is an automatic chain lubricator on my 72 roadster. The thing is that i have read that there should be one ,but i cant find any. Is the reason why my chain is so oily just oil-leaks :D hehe.
 
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It looks to me that it is the isolatics in the front of the engine that is moving when i push and shakes the wheel and swing arm.- the engine is moving ,and i have not detected any movement in the pivot .

Anyway i think i have to take a closer look on it. That can maybe be dangerous to drive with ? ,of course it depends on how bad it is.
 

L.A.B.

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If you say there is no movement in the (swinging arm?) pivot then I would think the front (and probably the rear) isolastic mounting is badly in need of re-shimming? The clearance should be set to 0.010" (0.25mm) or slightly less for better handling.
 
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