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JSGAuto
Silver CB900F
Silver CB900F



Joined: Nov 25, 2004
Posts: 1433
Location: Succasunna, NJ

PostPosted: Wed Nov 07, 2007 12:38 am Reply with quote Back to top

Hi everyone,

After reading this frame flexing discussion it got me thinking (and researching). It seems that the rubber bushings in these motors can be replaced with something a bit harder, to increase the stiffness of the chassis.

I will probably turn out a set for myself, but would anyone else be intrested in a set if I produced a few extras?

Just throwing ideas out there. Seems like a good way to make a small improvement on our old bikes.

Jim
 
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fasterspider
Red CB1100F
Red CB1100F



Joined: Jan 24, 2004
Posts: 15809
Location: Studio City, Los Angeles, Ca. 91604

PostPosted: Wed Nov 07, 2007 1:04 am Reply with quote Back to top

JSGAuto wrote:
Hi everyone,

After reading this frame flexing discussion it got me thinking (and researching). It seems that the rubber bushings in these motors can be replaced with something a bit harder, to increase the stiffness of the chassis.

I will probably turn out a set for myself, but would anyone else be intrested in a set if I produced a few extras?

Just throwing ideas out there. Seems like a good way to make a small improvement on our old bikes.

Jim

I will take at least one set if the cost is reasonable because I was just thinking on how to get that done for my red bike and the "R"eplica which has solid mounts.
 
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JSGAuto
Silver CB900F
Silver CB900F



Joined: Nov 25, 2004
Posts: 1433
Location: Succasunna, NJ

PostPosted: Wed Nov 07, 2007 1:48 am Reply with quote Back to top

Of course the cost will be reasonable.

The more intrest, the more material I will buy, and the cheaper the cost.
 
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fasterspider
Red CB1100F
Red CB1100F



Joined: Jan 24, 2004
Posts: 15809
Location: Studio City, Los Angeles, Ca. 91604

PostPosted: Wed Nov 07, 2007 1:50 am Reply with quote Back to top

JSGAuto wrote:
Of course the cost will be reasonable.

The more intrest, the more material I will buy, and the cheaper the cost.

Then I will take two sets if it is gonna be like that my friend because I have two soft mount engines in need of help.
Thank you.
 
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burned
Hawk
Hawk



Joined: Sep 26, 2007
Posts: 408
Location: littleton colorado

PostPosted: Wed Nov 07, 2007 2:34 am Reply with quote Back to top

id take a set.
 
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CB1100Fun
Twinstar
Twinstar



Joined: Aug 25, 2007
Posts: 52
Location: Oakland, Maine

PostPosted: Wed Nov 07, 2007 2:55 am Reply with quote Back to top

I'll take a set. Thank you
 
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genesound
Red CB1100F
Red CB1100F



Joined: Feb 20, 2006
Posts: 11654
Location: Studio City, California

PostPosted: Wed Nov 07, 2007 6:55 am Reply with quote Back to top

Sounds like a good idea, even though my 11F is straight as an arrow... I'm all in. Wink

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powerroy
Black CB900F
Black CB900F



Joined: Jul 04, 2004
Posts: 1696
Location: Arizona, Apache Junction

PostPosted: Wed Nov 07, 2007 1:27 pm Reply with quote Back to top

Depending on the cost, I'll take a set
 
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larryg
CB1100F
CB1100F



Joined: Feb 28, 2005
Posts: 3393
Location: western mass

PostPosted: Wed Nov 07, 2007 1:39 pm Reply with quote Back to top

Same here Jim.
 
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NV900F
Silver CB750F
Silver CB750F



Joined: Aug 20, 2007
Posts: 539
Location: Henderson, NV

PostPosted: Wed Nov 07, 2007 2:29 pm Reply with quote Back to top

i'm up for 2 sets
 
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HondaFan
Twinstar
Twinstar



Joined: May 05, 2006
Posts: 187
Location: Reno, NV Gateway to Fabulous Lake Tahoe

PostPosted: Wed Nov 07, 2007 3:16 pm Reply with quote Back to top

Count me in for one!
 
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CB900SS
Red CB1100F
Red CB1100F



Joined: Jun 08, 2005
Posts: 5476
Location: Mastic Beach, Long Island, NY

PostPosted: Wed Nov 07, 2007 5:59 pm Reply with quote Back to top

Sounds like you will save me some work. What exactly are we talking about here? Simply round aluminum stock to fit into where the rubber was in the motor? So 4 of them for the rear of the motor? I also was trying to think of a way to get rid of those stupid rubber spacers (you know the ones with the metal washers glued to each side), I was thinking just some washers for that job.

But the four rubbers in the rear of the motor seems like the most important to make solid. Everyone should measure these holes if they have motors on the ground, I would be curious if they are all close in size. I wouldn't want to have any slop in there.
 
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DennisTheMenace
Black CB750F
Black CB750F



Joined: Dec 25, 2004
Posts: 958
Location: Corrales, NM (by Albuquerque)

PostPosted: Wed Nov 07, 2007 6:33 pm Reply with quote Back to top

The four motor holes are the same size - but unfortunately, I don't have the measurements handy.

Also, the lower frame rails have big openings for the rubber spacers for the front lower motor mounts too.

I had four aluminum plugs and two steel plugs made up to solid mount my motor and just used the links (for now) in the front. The steel plugs I welded into the frame tube holes and the aluminum plugs I just tapped into the engine cases. Use washers or spacers of the right thickness to take up the space between the mounts and the motor so you're not pinching the frame when you tighten the motor mount bolts down.
 
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JSGAuto
Silver CB900F
Silver CB900F



Joined: Nov 25, 2004
Posts: 1433
Location: Succasunna, NJ

PostPosted: Wed Nov 07, 2007 11:07 pm Reply with quote Back to top

Seems like there is one or two people intrested.

What I will do is make the back 4 mounts first, as they are the same. This will speed along the process. After we are all happy with this We will take a look at the front mounting.

I'll order some material tonight.

Please be patiant though. My lathe was made in 1947, and every operation is manualy operated. Its fun to use, but time consuming. Cost me about as much as a new made in China one, but if it lasted this long, she is good for me!

Thanks,
Jim
 
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mr01000101
Twinstar
Twinstar



Joined: Jan 22, 2006
Posts: 224
Location: San Diego, CA

PostPosted: Wed Nov 07, 2007 11:51 pm Reply with quote Back to top

Like Ray, I need to mount a rubber-mounted engine (900F) in a solid-mounted (750F) frame.
I'm not sure how the mount points differ on the frames between the mount styles, maybe they are the same?
If you make some batches of spacers that will work for my application, I will gladly pay for a set.
 
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WhiteCloud
Hawk
Hawk



Joined: Aug 18, 2006
Posts: 272
Location: Alsip, Ill

PostPosted: Thu Nov 08, 2007 12:28 am Reply with quote Back to top

What is the advantage to solid mounting the motor, is it like mentioned to make the frame stiffer and why did'nt Honda do this on the bike in the first place? And is there a down side to doing this?
 
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JSGAuto
Silver CB900F
Silver CB900F



Joined: Nov 25, 2004
Posts: 1433
Location: Succasunna, NJ

PostPosted: Thu Nov 08, 2007 12:48 am Reply with quote Back to top

The advantage is the engine will act as a frame member, making it more rigid.

The down side is there will be increased vibration.

Honda made a bike that was smoother, giving up a bit of performance.
 
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woodyow
MB-5
MB-5



Joined: Apr 18, 2005
Posts: 8
Location: Sydney, Australia

PostPosted: Thu Nov 08, 2007 1:22 am Reply with quote Back to top

I am currently rebuilding a 900, and have converted from the stock rubber mounts
to a rigid mount. I used alloy plugs in the engine parts, welded some steel into the
lower frame mounts (TIG welded). I have ditched the front swinging mounts and
have made alloy CNC machined brackets instead.
The right hand bracket is pretty easy to manufacture, the left was very time consuming
to machine up. These are currently away being anodized, and when they return, I will
submit some pictures.
Cheers,
Rob.
 
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stoutblock
Friend of the Board
Friend of the Board



Joined: Jun 22, 2003
Posts: 4635
Location: Seattle

PostPosted: Thu Nov 08, 2007 3:19 am Reply with quote Back to top

Pictures please!

I need some plugs to allow mounting a 1100 engine in a 750 frame.
 
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Blainethemono
CB1100F
CB1100F



Joined: Mar 03, 2004
Posts: 3279
Location: Seattle

PostPosted: Thu Nov 08, 2007 2:17 pm Reply with quote Back to top

Sorry Woodyow, but I have to ask... Are you the guy from Aussie land who posted a thread about a 14 year olds weld jobs on a "home made" race replica swing arm?? If so, did the "kid" do this welding too?

Just curious.... Shocked
 
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CB900SS
Red CB1100F
Red CB1100F



Joined: Jun 08, 2005
Posts: 5476
Location: Mastic Beach, Long Island, NY

PostPosted: Thu Nov 08, 2007 9:50 pm Reply with quote Back to top

DennisTheMenace wrote:

Also, the lower frame rails have big openings for the rubber spacers for the front lower motor mounts too.


Its been a while since I thought about this. Yes, the front in the frame needs steel to replace the rubber mount in the frame. Thanks Dennis.
 
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Blainethemono
CB1100F
CB1100F



Joined: Mar 03, 2004
Posts: 3279
Location: Seattle

PostPosted: Sat Nov 10, 2007 12:32 am Reply with quote Back to top

Quote:
Its been a while since I thought about this. Yes, the front in the frame needs steel to replace the rubber mount in the frame. Thanks Dennis.


You mean like this???




Image
 
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woodyow
MB-5
MB-5



Joined: Apr 18, 2005
Posts: 8
Location: Sydney, Australia

PostPosted: Sun Nov 11, 2007 4:00 am Reply with quote Back to top

Blainethemono wrote:
Sorry Woodyow, but I have to ask... Are you the guy from Aussie land who posted a thread about a 14 year olds weld jobs on a "home made" race replica swing arm?? If so, did the "kid" do this welding too?

Just curious.... Shocked


ummm, no Blainethemono, I am Aussie, but nothing about 14 year olds welding.

Will have pictures in about a week of my front brackets.
Rob
 
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CB900SS
Red CB1100F
Red CB1100F



Joined: Jun 08, 2005
Posts: 5476
Location: Mastic Beach, Long Island, NY

PostPosted: Mon Nov 12, 2007 6:05 pm Reply with quote Back to top

Blainethemono wrote:
Quote:
Its been a while since I thought about this. Yes, the front in the frame needs steel to replace the rubber mount in the frame. Thanks Dennis.


You mean like this???


Its hard to see in the picture. Dennis is talking about where the rubber inserts go into the frame, they go inside of the round holes at the bottom of both lower frame rails. I assume da beast has the rubbers replaced with steel, but I can't see from the picture.
 
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CB900SS
Red CB1100F
Red CB1100F



Joined: Jun 08, 2005
Posts: 5476
Location: Mastic Beach, Long Island, NY

PostPosted: Mon Nov 12, 2007 6:06 pm Reply with quote Back to top

woodyow wrote:
I am currently rebuilding a 900, and have converted from the stock rubber mounts
to a rigid mount. I used alloy plugs in the engine parts, welded some steel into the
lower frame mounts (TIG welded). I have ditched the front swinging mounts and
have made alloy CNC machined brackets instead.
The right hand bracket is pretty easy to manufacture, the left was very time consuming
to machine up. These are currently away being anodized, and when they return, I will
submit some pictures.
Cheers,
Rob.


Rob, please don't forget. I would love to see them! Very Happy
 
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woodyow
MB-5
MB-5



Joined: Apr 18, 2005
Posts: 8
Location: Sydney, Australia

PostPosted: Fri Dec 07, 2007 11:35 pm Reply with quote Back to top

OK guys, I have some pictures - not the best quality - but you should get the idea.
[img]Image[/img]
[img]Image[/img]
[img]Image
[/img]Image
[img]Image

[/img]
 
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DennisTheMenace
Black CB750F
Black CB750F



Joined: Dec 25, 2004
Posts: 958
Location: Corrales, NM (by Albuquerque)

PostPosted: Fri Dec 07, 2007 11:53 pm Reply with quote Back to top

Thanks for posting the front mount photos -- the ideas I was coming up with weren't as good!
 
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Midnight
Silver CB900F
Silver CB900F



Joined: Sep 24, 2005
Posts: 1307
Location: Utrecht, The Netherlands

PostPosted: Fri Dec 07, 2007 11:53 pm Reply with quote Back to top

Nice job! Smile
 
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toddk
CB1100F
CB1100F



Joined: Mar 25, 2004
Posts: 2248
Location: Saratoga Springs, New York

PostPosted: Sat Dec 08, 2007 12:53 am Reply with quote Back to top

I'll take a set please Jim.

Thanks,

Toddk
 
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stoutblock
Friend of the Board
Friend of the Board



Joined: Jun 22, 2003
Posts: 4635
Location: Seattle

PostPosted: Sat Dec 08, 2007 10:31 pm Reply with quote Back to top

Me too, maybe two sets if they are reasonable...
 
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