adjusting rear chain

Nice bit of info, so 30mm to 40mm of sag has the chain pretty close to its tightest place on std shocks. Mine shocks are a bit longer than std so at close to correct sag is where the chain is its tightest and where its adjusted to 10mm up and 10mm down of free play, 20mm all up and looser is better than tighter.
 
Cosi said:
I measure from the axle to the rear of the swing arm, as Cam says if all is straight, tyres casings are far from perfect, you'd need the tyres off to be accurate
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When I got my frame back after it had been straightened I was told by the guy that had done it that he had set the rear axle perfectly square on. I had always measured from the swing arm spindle to the rear axle both sides as an estimate of alignment so was pleasantly surprised when I measured after he had done the alignment to find that this measurement was spot on.
 
Also good to know, some bikes have offset swingarms especially some shaft drive bikes. I use Robs Bs method of a pair of dividers made out of 2x1 with a nail in each end to get around the mufflers to check rear wheel alignment, equal distances either side.
 
It is vital to check chain freeplay through the entire range of swingarm movement if you fit longer dampers. My SFs need 40mm freeplay fully extended to avoid overtightening at the tightest point.
I always align my chain so that the rear wheel is exactly in line with the front wheel a?la stringline method on any bike, but I don?t need string as I know what I?m looking at. If that means that it is not within a micron either side between the axle and swingarm bolt, so be it, the bike has to steer straight.
 
The feel is also very chassis related.
On a standard Laverda, a couple of mm ain't going to do much.

On my Geminiani framed TT2, a gnats hair and it feels like the bike hinged in the middle.

Paul
 
Vince said:
Also good to know, some bikes have offset swingarms especially some shaft drive bikes. I use Robs Bs method of a pair of dividers made out of 2x1 with a nail in each end to get around the mufflers to check rear wheel alignment, equal distances either side.
Click to expand...
am the owner of two bmw's and the only adjustment you can make is on the pivot adjuster. Never adjusted my chain yet must be a good one
 
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