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Shocking
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docmike



Joined: 27 Jan 2005
Posts: 630
Location: Eastern NC

PostPosted: Sat Feb 12, 2005 10:49 pm    Post subject: Shocking Reply with quote

My new Penske shock was on the carport floor when I got home from work yesterday Clapping Very Happy

Mounted it this morning. Turns out its about 0.3 inch larger diameter than the old shock, and with the 175/65 x14 tire on the back there's a serious interference problem Sad Mad

Guess I'll call Penske Monday morning and se if they have a skinnier spring, but I'm kind of scared I already know the answer

Which leaves two, well actually three choices Question

1) space the rear wheel over to the left some more. I've already spced it over about 3/16 of an inch and am not sure I want to go farther.

2) build new shock mounts and move the shock to the right. Would have to go about an inch to clear the sidecovers etc. (trust me on a K11 you want the covers or you'll cook your thighs)

3) go back to the old shock Sad

Any suggestions?
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93 BMW K1100RS / EML Speed 2000
89 Honda GB 500 (6,700 miles, all original except tires)
67 Triumph 650 chopper
92 Suzuki GS500 (eldest son)
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bmcsheehy



Joined: 22 Jan 2005
Posts: 981
Location: Massachusetts USA

PostPosted: Sat Feb 12, 2005 11:10 pm    Post subject: Reply with quote

That's a bummer Banging your head against the wall.
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Bill
High Performance Sidecaring... ...There is nothing "HACKED" about it.
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Ralph



Joined: 27 Jan 2005
Posts: 591
Location: Lexington, Ky

PostPosted: Sat Feb 12, 2005 11:32 pm    Post subject: Reply with quote

Not 3 Mike Sad
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swaybar2002



Joined: 26 Jan 2005
Posts: 380
Location: Central Pa.

PostPosted: Sun Feb 13, 2005 6:11 am    Post subject: Reply with quote

Suggestion: Make a spacer to go between the wheel and where it mounts and move the wheel. You should probably use longer bolts though.
For what it's worth,
Claude
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docmike



Joined: 27 Jan 2005
Posts: 630
Location: Eastern NC

PostPosted: Mon Feb 14, 2005 3:48 pm    Post subject: Reply with quote

Been on the phone with Bruce at Penske, there are a few possiblities, have to measure a few things on the bike and call him back tomorrow. Need to know how much travel I really need???

They could rebuild it as a smaller diameter shock, but then they're limited on spring choices and can't get the right length and rate, unless I want to spend for a custom wound spring.

Quote:
Suggestion: Make a spacer to go between the wheel and where it mounts and move the wheel. You should probably use longer bolts though


I've already did that about 3/16" to mount the 175 tire and am a little worried about going farther.
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Mike Currin
93 BMW K1100RS / EML Speed 2000
89 Honda GB 500 (6,700 miles, all original except tires)
67 Triumph 650 chopper
92 Suzuki GS500 (eldest son)
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docmike



Joined: 27 Jan 2005
Posts: 630
Location: Eastern NC

PostPosted: Tue Feb 15, 2005 3:04 pm    Post subject: Reply with quote

Good news, am returning the shock to Penske, made some measurements on the shock turns out the rig is only using about 2 inches of shock travel. They're going to rebuild the shock using a 45 mm body and a 2 inch ID spring, that's only 6 inches long. The shorter length of the spring was the concern, the original spring was 8 inches and would compress more before the spring binds.

Should have it back by next week. Very Happy
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Mike Currin
93 BMW K1100RS / EML Speed 2000
89 Honda GB 500 (6,700 miles, all original except tires)
67 Triumph 650 chopper
92 Suzuki GS500 (eldest son)
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JayBoy



Joined: 26 Jan 2005
Posts: 234
Location: Lexington, KY

PostPosted: Thu Feb 24, 2005 9:21 pm    Post subject: Reply with quote

Any news????
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swaybar2002



Joined: 26 Jan 2005
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Location: Central Pa.

PostPosted: Fri Feb 25, 2005 1:56 am    Post subject: Reply with quote

What spring rates are you all running on the rear shock?
Do you run different rates with a swaybar than without one?
Curious Claude
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bmcsheehy



Joined: 22 Jan 2005
Posts: 981
Location: Massachusetts USA

PostPosted: Fri Feb 25, 2005 11:58 am    Post subject: Reply with quote

My opinion,
If you run a sway bar youíll end up running a lighter spring than if you didnít.
My reasoning, the rear swing arm and the sidecar swing arm will be connected by a big spring. So you add the sway bar, the sidecar spring and the rear bike spring all work together. Not 1 for 1 but they influence each other.

This theory is completely untested and based on absolutely nothing but my imagination
Thinking
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Bill
High Performance Sidecaring... ...There is nothing "HACKED" about it.
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swaybar2002



Joined: 26 Jan 2005
Posts: 380
Location: Central Pa.

PostPosted: Fri Feb 25, 2005 12:11 pm    Post subject: Reply with quote

bmcsheehy wrote:
My opinion,
If you run a sway bar youíll end up running a lighter spring than if you didnít.
My reasoning, the rear swing arm and the sidecar swing arm will be connected by a big spring. So you add the sway bar, the sidecar spring and the rear bike spring all work together. Not 1 for 1 but they influence each other.

This theory is completely untested and based on absolutely nothing but my imagination
Thinking


bILL,
I think your 'imagination' is correct.
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Claude Stanley

Founder: Internet Sidecar Owners Klub
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docmike



Joined: 27 Jan 2005
Posts: 630
Location: Eastern NC

PostPosted: Fri Feb 25, 2005 1:32 pm    Post subject: Reply with quote

I'm still waiting on the rebuilt shock.

They measured the spring rate of the old shock at 490 pounds, even before adding the sway bar I never moved it off of the lowest preload setting.

For the new shock I'm trying a 450 pound spring.

Penske says as long as I don't damage the spring they will keep changing it out until I'm happy.

I'll let you know when I get it.
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Mike Currin
93 BMW K1100RS / EML Speed 2000
89 Honda GB 500 (6,700 miles, all original except tires)
67 Triumph 650 chopper
92 Suzuki GS500 (eldest son)
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JayBoy



Joined: 26 Jan 2005
Posts: 234
Location: Lexington, KY

PostPosted: Fri Feb 25, 2005 7:10 pm    Post subject: Reply with quote

As to the swaybar spring rate discussion. If the shocks are custom built to handle the additional weight is it possible a swaybar (anti) isn't necessary?.....OR if you have the right shocks a smaller swaybar would be called for instead? Question
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swaybar2002



Joined: 26 Jan 2005
Posts: 380
Location: Central Pa.

PostPosted: Sat Feb 26, 2005 12:00 am    Post subject: Reply with quote

Yes and Yes...but... some feel the advantages of a swaybar are worth the effort regardless.
Claude
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zentime



Joined: 22 Jan 2005
Posts: 833
Location: Massachusetts USA

PostPosted: Sat Feb 26, 2005 1:09 am    Post subject: Reply with quote

JayBoy wrote:
As to the swaybar spring rate discussion. If the shocks are custom built to handle the additional weight is it possible a swaybar (anti) isn't necessary?.....OR if you have the right shocks a smaller swaybar would be called for instead? Question


It's really the same as it would be for, let's say a Suburban, Wink The principal is the same as it would be for any car/truck/suv or NASCAR. Stifer shocks will reduce body roll for sure but then the ride would suffer and the wheels would tend to hop over the bumps rather than track over them. The need for them on a sidecar pretty much paralles why the're used on most vehicles.
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docmike



Joined: 27 Jan 2005
Posts: 630
Location: Eastern NC

PostPosted: Wed Mar 09, 2005 1:43 pm    Post subject: Reply with quote

The big brown truck stopped at my house yesterday and left the rebuilt Penske shock. Looks like it should fit this time, haven't been able to get it mounted yet.

It was a little windy here yesterday, spent all my time retrieving lawn furniture and dismantling what was left of the gazebo/screen room I put up last month for the wife's birthday present. Could have been worse, a guy about 2 miles from the house lost two of his six chicken houses and has somewhere around 30,000 dead chickens to bury.

All in all, happy to be here and have a roof.

Mike
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Mike Currin
93 BMW K1100RS / EML Speed 2000
89 Honda GB 500 (6,700 miles, all original except tires)
67 Triumph 650 chopper
92 Suzuki GS500 (eldest son)
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