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Old 06-15-2013, 06:42 AM   #1
Wistrick OP
Gnarly Adventurer
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Joined: Nov 2007
Oddometer: 275
stiffer sidewall tire

On the advice of a dealer I put a PR3 (B) (stiffer side wall tire on my 09 MotoGuzzi Norge.... Trying to get more miles out of a rear...Around the same time I added a Penske Rear shock....

Now to my point...2up loaded the bike rides pretty nice....But without the bags 1up every little bump jars your teeth out....I can get proper sag measurements with the preload backed almost all the way off...wondering if the stiffer side wall tire is making the ride more bumpy...or if I need to go down on the spring size of the rear shock...I been running the tire pressure @ 41 psi per MOM should I be be running it at lower PSI....

I broke a carnal rule and made to many changes at once and now I am have a time trying to figure it out...

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Old 06-15-2013, 06:56 AM   #2
Bigger Al
Still a stupid tire guy
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Joined: Oct 2004
Location: Auburn, CA
Oddometer: 7,981
Drop the pressure down to 32-35 and set your spring to it's softest point. Use that as your baseline and make adjustments from there to suit the ride quality that you're looking for.
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Old 06-15-2013, 08:21 AM   #3
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Joined: Nov 2009
Location: Hiding off Hwy 6, B.C.
Oddometer: 4,725
Does the shock have an adjustable compression dampener like my Ohlin? That's how I work the bumpiness out.I can reach my adjuster when riding so adjust to road conditions and sometimes it is all about how the old back feels. A couple clicks on the Ohlins, makes all the difference.

Most hide that adjuster under the seat on the K1200RS, that's apparently where it fits best....not for me that I like on the fly adjustements.

The tire pressure....mine should be set at 42. I ain't really saying what I am going to do with the new PR3 B I installed yesterday, way too controversial in other forums that. I'll run my own experiments but Eh! I may already have done that.

Elusive them 12,000 miles tires....change that to Kms maybe.
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Old 06-15-2013, 12:07 PM   #4
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Joined: Nov 2011
Location: Concord, CA
Oddometer: 2,034
New suspension - my bike road like it had no suspension.
Adjusted rebound and compression damping way down a few clicks at a time.
Now it rides great.

If your sag is good, the spring is right but the compression/rebound may not be.
2007 BMW GS Adventure / 2000 Ducati 900ss / 2010 Harley Ultra Limited / 1975 BMW R90/6 / 2006 DRZ400S
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