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Twinpot View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Twinpot Quote  Post ReplyReply Direct Link To This Post Topic: Chainline
    Posted: 11 Nov 2017 at 17:49
How reliable are the chain adjuster markings on the swingarm for a gen2 RSV. The chain adjuster markings on mine are both equal, but using a chainline guide the chain seems slightly out of whack and bringing the chain inline with the correct chain slack, the chainbolt adjuster on the right hand side is closer to the end of the swingarm than it is on the left hand side. This is my first season with Aprilia so I have limited knowledge and call on the voices of the more experienced.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote constant Quote  Post ReplyReply Direct Link To This Post Posted: 11 Nov 2017 at 20:38
i had my gen 1 up at griffs the other month and asked lewis about this he said the marks are 1 to 2 out and to measure from the end of the adjuster block to the end of the swing arm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote constant Quote  Post ReplyReply Direct Link To This Post Posted: 11 Nov 2017 at 20:57
forgot to add the reason is the swing arms are the same length either side (obviously) but they hand stamp the adjuster markings by hand and in most cases after they been to lunch which involves a small amount of win and this from people who have worked and toured the factory
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 426hemi Quote  Post ReplyReply Direct Link To This Post Posted: 11 Nov 2017 at 21:23
My gen1 is about half a mark out setting it up with a chain laser tool.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Spoonz Quote  Post ReplyReply Direct Link To This Post Posted: 11 Nov 2017 at 21:25
Considering the frames and swingers are made by verrlichi and come to Aprilia as a finished item I find pissed aprilia workers hard to believe.

But in general I wouldn’t take the marks as gospel on any make bike as mass production ain’t that accurate.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote redratbike Quote  Post ReplyReply Direct Link To This Post Posted: 11 Nov 2017 at 21:39
Always measure never rely on the markings


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tifa Quote  Post ReplyReply Direct Link To This Post Posted: 11 Nov 2017 at 22:21
Originally posted by Spoonz Spoonz wrote:

I find pissed aprilia workers hard to believe......

 

Hahahahahahaaa!
You'll be telling us that they don't grease bearings next...LOL

Markings are a bit of a lottery in my limited experience.
I've got a lazer thingy which is pretty good, but I can do it almost as well by eye and looking at the chain travel, and by actually 'listening' to it? 
 That last bit does work..sometimes...could be voodoo though...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote legend88 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Nov 2017 at 09:04
Originally posted by Tifa Tifa wrote:

by actually 'listening' to it? 
 That last bit does work..sometimes...could be voodoo though...


If the chain is in good condition and well lubed this does work up to a point.

You have to be careful where you measure to/from. The end of the swing arm would not be my choice as it would never be considered a 'critical' surface/position in either the design or manufacturing process (It's just a point that 'hangs somewhere out there'). Hence it would not be a controlled surface and could vary significantly, at least significantly in relation to the accuracy we look for in chain alignment. Neither is the end of the adjuster block.

The only true check is front sprocket to rear sprocket but swing arm pivot to rear axle is in almost all cases (Unless frame or swing arm is distorted) very accurate. And remember, the longer the distance you measure over the less - proportionally - any error matters. That doesn't mean I always use these methods mind Wink
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Twinpot Quote  Post ReplyReply Direct Link To This Post Posted: 12 Nov 2017 at 09:47
Thank you all for the replies. You would have thought that you could take the chainline markings on the swingarm as gospel, but clearly not. In my naivety I was kinda hoping that Aprilia would have had it spot on, meaning no faffing about with chainline guides or steel rules. It is I suppose situation normal no matter what brand is stamped on the tank. The sun is shining and the roads are dry in Lincs, so I'm taking the RSVR out for a final spin before it gets put to bed and the VFR carries me through winter.   I will put trust in my own chainline adjustment and not worry about the swingarm markers..........if I can.....Doh!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FTM Quote  Post ReplyReply Direct Link To This Post Posted: 12 Nov 2017 at 10:31
I've never ever lined up chains or sprockets I always use the adjusters to get the right chain tension and the tyres to run parallel, an old 6ft level works for me to parallel the tyres. It's always worked for me LOL
 One day I'll make a wheel aligning tool out of two 6ft levels and a couple of threaded rods.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote legend88 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Nov 2017 at 11:51
Originally posted by FTM FTM wrote:

One day I'll make a wheel aligning tool out of two 6ft levels and a couple of threaded rods.


A couple of axle stands and a ball of string will do this fine.

But remember, wheels running parallel doesn't necessarily mean the chain is running true. With a straight frame (And everything else) and everything assembled correctly that will generally be the case but they are two separate things and one does not always follow the other. And if you find that one is true and the other isn't well then you have a decision to make.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote FTM Quote  Post ReplyReply Direct Link To This Post Posted: 12 Nov 2017 at 14:40
Yes I realise that but with the correct chain and sprockets fitted everything should line up properly, unless a spacer has been misplaced. I also think If something has to be out of line I'd rather it be the chain than the wheels. But saying that didn't some of the earlier BMW GS's have the wheels out of line from new. I know some people who fit RC45 wheels to RC30's run them a couple of mm out of line because the rear tyre hits the chain otherwise.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote redratbike Quote  Post ReplyReply Direct Link To This Post Posted: 12 Nov 2017 at 17:08


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Post Options Post Options   Thanks (0) Thanks(0)   Quote legend88 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Nov 2017 at 20:58
Originally posted by FTM FTM wrote:

  I also think If something has to be out of line I'd rather it be the chain than the wheels.


Yeah, that's what I was getting at really, only you can decide which you want to prioritise.

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