A tool for the job is the only practical way of fitting the rear spring...Without that it's very nearly impossible. In fact that's why I decided to make something up....I have one I made myself and one from a forum member who came up with a better design than I did at my first attempt...
I'll post a picture of it later if nobody beats me to it....Ian
This is the one that came from a forum member in NL. It can still be a bit awkward as it can squeeze up the spring loops a bit. But as Ian said, near impossible without something like it. Ron
Yes, I made a few of the ones pictured, hope they all work like they should.
Never noticed the deforming of the spring loops, Ron... will have a look on that next time I use it.
What I did notice was that the M10 thread can hardly handle the force of expanding the spring, so I keep mine well greased and then it works OK. M12 would probably have been a better choice.
Mark, you're welcome to copy and improve the tool, you have far better workshop equipment than I have :+1:
Yes, I keep a liberal coating of graphite grease on the thread to prevent galling caused by the extreme pressure...I generally knock a tapered punch into the spring eyes to expand them and ensure they are an easy fit over the mounting pins before employing the tool...
One small problem that may warrant further detail work is the clearance between one of the pins on the tool and the footrest mounting lug when fitting the spring to the bike...There is slight interference at that point....A good tool though and as I noted better in some respects than the one I made!..Ian
It looks like Michiel has already dressed one of the loop posts with a grinder?
I've been very grateful for that tool. It was the spring loops on my B30 that squeezed up a bit. I thought it was the same spring as an M20, but maybe the loops are lighter or smaller??
Untill I made a similar toolI used to fit the spring first then fit the stand to the bike
That way you can use the actual stand for leverage
Still not an easy task but does work if you do not end up pulling the bike on top of you
I have done it with the bike on the front stand and with the bike on a jack .