Posts
525
Joined
5/4/2013
Location
Ontario, CA
Edited Date/Time
9/7/2014 7:26pm
Two RM85 questions...
(1) Would this spanner wrench work for a 2006 RM85? If not, can you recommend one?
http://www.canadasmotorcycle.ca/drag-specialties-shock-spanner-wrench-d…
(2) We bought this RM from a guy who had outgrown it, and had adjusted the suspension to raise the seat height as much as he could.
I need to lower the seat height for my daughter, so I was going to back the preload off the rear spring (it is tightened all the way down) and also thought I would raise the forks in the triple clamps.
But the previous owner must have already raised them?? Look at the picture. If he wanted a higher seat height, I thought he would have lowered the forks as far as they would go....no??

(1) Would this spanner wrench work for a 2006 RM85? If not, can you recommend one?
http://www.canadasmotorcycle.ca/drag-specialties-shock-spanner-wrench-d…
(2) We bought this RM from a guy who had outgrown it, and had adjusted the suspension to raise the seat height as much as he could.
I need to lower the seat height for my daughter, so I was going to back the preload off the rear spring (it is tightened all the way down) and also thought I would raise the forks in the triple clamps.
But the previous owner must have already raised them?? Look at the picture. If he wanted a higher seat height, I thought he would have lowered the forks as far as they would go....no??

2. The way those forks are installed will negatively affect handling at speed. Lower them to so that the line just below the cap is flush with the top of the triple clamp. The shock preload also should not be used to adjust seat height, your child will benefit more from having it set so the bike has proper race sag (plenty of info out there on this). Usually around 100mm of difference in measurement from rear axle to fender from when the bike is on stand unweighted to when your child is on the bike in full gear. Shaving the seat down would be a preferable option. Suspension companies also offer lowering service if that is not enough, but I would not suggest improper sag and fork height to achieve it- although it may help your child touch the ground it will handle like a rock.
So yeah I thought it was weird that the forks would be so high in the clamps if the guy was trying to raise the seat height.
I will at least back the preload off to the stock setting and see where that leaves us.
Thanks!
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I used a steel rod and a hammer to adjust the rear spring. I banged up the adjuster ring a little so for 20 bucks I will probably get the spanner tool for future use.
WHAT A DIFFERENCE. I dropped the forks a tiny bit for safety's sake and backing off the spring lowered the seat to an acceptable height. The bike looks a lot more natural now.
Yeah the bike is in good shape, thanks. It was never raced, barely ridden.
Those forks are designed to be at the level they are at it your picture. That chassis is used for the 85 and 100, In 85 form with small wheels and the short swingarm, the forks go way up in the clamps like that and there is actually a line there to set them at. If it is the RM100, the forks are designed to be slid down to that other line near the top cap to accommodate the larger wheels and longer swingarm. The CR85/CRF150 is the same way.
The longer fork mark is designed to be used in conjunction with the longer 85L swingarm, both so that the larger L (aka supermini) wheels will fit. Yes, the small wheels will work great with the longer swingarm and extended forks.
Steph, the best way to lower that bike is to add shock and fork spacers. The forks are particularly easy to do, though the shock does require require recharging the nitrogen. If it's been a while since the shock has been serviced, now might be a good time to do so, particularly given that the little RM is prone to having the shock seal go out. Another option for the rear of the bike is a lowering link.
Sag on the RM85 is 85-95mm.
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