When I first rode my new 2017 KLR650 I noticed that the handle bars not perfectly straight when riding down a straight stretch of road.
I thought that this was probably normal and nothing to worry about. The front tire is straight with the handle bars held straight.
The bike has never been crashed or dumped on its side. When I adjusted the chain I would use a pair of calipers to measure
between the bottom of the adjuster bolt heads and the locknut on both sides making them the same and the cast in marks for adjustment were very close as well.
A couple nights ago I measured between the centre of the axle and the centre of the swing arm pivot bolt and there was over 1/8" difference.
I adjusted the right chain adjuster forward 1/8" so the rear axle was parallel to the swingarm pivot bolt.
Now the handlebars are straight. I have only ridden the bike a couple times since but right away I noticed that it felt a lot more stable in tight turns
especially turning to the right. The neighbourhood I live in has 2 roads to access it both have steep hills with tight turns at the top.
One of them has a tight right turn part way up. I rode up the one with the tight right turn several times today and there is a noticeable
improvement having the rear wheel adjusted straight.
I was able to get out on the KLR a couple time today between rain storms. I waited until the pavement was dry both times and put a few kilometres on it.
I have a pair of Metzeler Karoo 3 tires on the KLR not the best pavement tires but they handle pretty good all around. Getting the rear tire properly aligned
made a big improvement in handling! I know its not a sport bike by any means but there is a big difference going into corners.