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Is there any possibility of a coil over front unit for Bramptons?
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By the way, in the photo of the rear Thornton above, and also on the front one,it shows the rubber bumper in an orientation the way I got it. I kept it that way, but it seems it would work better the other way around on the shaft, since now the small end of the bumper hits the seal when the travel bottoms things out. Am I wrong on this?
I thought AVO had the bump stop the wrong way round as it would contact the seal more. They said it was fine, the scraper outboard of the seal is easily tough enough.Ron,
I think the seal is is supported on the inner side, but I will have to look the next time I change the oil. The rubber bumper is said to give .25" of travel before it prevents further movement. I think if you hit the bumper it will slide over the lock nut on the rod which is holding it proud of the screw on end. Carleton hit a hay bale dead center once and the damper appeared untouched. It was not Carleton's crazy riding that was at fault. Another rider snagged some material that the bale was cloaked with and spun it onto the track.
What is the orientation of the bottom link when the bike is off the stand? It does seem to be pointing down a bit more than mine. The main thing is it must be pointing slightly up when sitting on the bike.
Are Brampton upper and lower links parallel and of equal length? I photoed some at Founders Day, but I was mainly interested in the spring mounting arrangements. Anyway, if they are parallel, the axle spindle must follow a circular path of radius equal to the link lengths.Just to note that the recent comments on front forks and modified steering heads concern only guirdraulics. The geometry of the Bramptons is different and it would be interesting for any bike owner with Bramptons to remove the front spring and to trace out the front wheel spindle movement as I did. Publishing the track either here or in MPH would educate a lot of us.
As an interesting note, and I hope I am not getting too far off track, When I ordered my Dave Hills center stand, I measured the rear pivot bolt distance as he specified, and got 12-3/4 inches. Dave commented that this was about an inch taller than typical, and was the second longest stand he had made, let alone for a B. I think my stand is a bit long now that things have settled in a bit, but the combination of the front and rear Thornton's and the Justin Mackay-Smith rear springs and spring boxes put the thing up in the air a bit. That is probably why my front stands are vestigial appendages now. B's should be lower than C's and a comfort to shorter inseams. Anyway, that is something to consider if you want to change to a Brampton coil over.