ok so the stock swingarm is 19" center of pivot to center of the adjusment slot. the one that im using is 21" center to center. ill get more on the front later.
Yeah, I was surprised about RR's claim of a 6" stretch. Anyhow, it's a cool bike - once it's together and you're riding it around you'll figure out how well it works and how best to have fun on it.
I said 6 inch because if you look at the rear angled down tube on the frame i was basing that figure on the gap between the tyre and the frame support rail, a stock bike has the tyre almost inline with the frame there, there is at least a 6 inch gap in your profile shot, also the bike should have a high profile 18 inch wheel, not a low profile 17 so that also adds to the problem. Remember i said i have cut down a mono shock swingarm myself and it is still 45mm { just under 2 inches longer}, my triple tree offset is 20mm less than stock so my wheelbase is an inch longer. I don't know how you measured those swingarms because i can clearly see that the back end is way longer than stock, maybe the 17 inch wheel accentuates that. Actually i just looked at your pics again and the shock mounts are more than 2 inches forward of the original position, i would re measure, lengthening the wheelbase will make it handle slower.
Here is a picture of a stock 550, you can see where the wheel is just in front of the rear frame tube, your bike has a much longer wheelbase.
I tell you this because you mentioned throwing it through the twisties, it won't respond like a stock bike with those changes.
Ifr i were you i would have a competent welder remove the monoshock section of that arm and match it up to a stock arm or maybe even 1 inch longer.....
Mick
