Author Topic: carpy's frame kit (Read 10799 times)

bikerbart · « **on:** June 21, 2010, 09:06:38 AM »

so I got carpy's frame kit(sorry Gordon)and installed it this weekend.The hardest part was actually deciding to cut my frame.It is a very stout and well made piece,but,it was slightly off.I didnt think it would be plug and play.Took a torch and a breaker bar,but it went on rather uneventfully,I know I will never sell my bike so it isnt about the "value"but rather the usefullness of being able to pull the head without the motor.I also took pics which for some reason I am having a hard time uploading.

swellguy · « **Reply #1 on:** June 21, 2010, 09:11:48 AM »

I'm not familiar with that kit. Are those downtubes?

Jerry Rxman Griffin aka MuthaF'er · « **Reply #2 on:** June 21, 2010, 09:24:49 AM »

Where are the pieces to connect to the top frame member?

bikerbart · « **Reply #3 on:** June 21, 2010, 09:33:44 AM »

there is none.The top frame isnt connected anymore.We will see.I am putting the carbs back on tonight and going to ride it hopefully tomorrow.I keep telling myself it will be fine.please dont discourage my enthusiasm.

HedNut · « **Reply #4 on:** June 21, 2010, 09:41:05 AM »

Nifty kit! I didn't know he did these.

Few questions for you:

1)You just cut out and throw away the oem frame piece?

2)Put the Carpy frame piece in place with the 4 tubes slid on...and once in place slide the tube centred over the cut....then do you drill holes thru both the tubes and the frame.... to bolt it in place?

These are my assumptions...how close am I?

Can we see some pictures of it installed!?

PS...I assume (assume being the key word) under normal cruizing circumstances that...without the frame triangulation (top member to bottom member connection) there wont be enough frame flex to be felt by the everyday street rider. Very aggressive riding, really bad roads and racing may be a different story though. I'm Pro Gordon! ahahah
BUT...I'm sure Carpy wouldn't sell crap..and this has been tested already...

Very Cool Stuff!
Cheers!!

mcpuffett · « **Reply #5 on:** June 21, 2010, 10:07:48 AM »

Installation pics please

, cheers Mick.

bikerbart · « **Reply #6 on:** June 21, 2010, 10:08:45 AM »

Yes you are correct.As I stated It is a very stout piece,stronger than the original frame,but we are omitting the top tube connection.I dont beat the crap out of my bikes,but I dont baby it either,I treat it like its a 37 yr old bike.I left the top tube gussets in case I want to add gussets to the carpy kit.

bikerbart · « **Reply #7 on:** June 21, 2010, 10:15:48 AM »

here is another one.

MCRider · « **Reply #8 on:** June 21, 2010, 10:29:09 AM »

That is a (nice way to say) rip-off of the old APE frame kit with the exception of the bar tying the 2 together. APE's didn't have that it was just 2 separate bars, with the sliding joints.

I road raced, then toured the bike heavy for 50k miles with the APE kit. Never a problem I could notice. Have fun. Big Jay siad they sold 10s of thousands of them for $29.95 IIRC.

bikerbart · « **Reply #9 on:** June 21, 2010, 10:52:58 AM »

thanks for that info,I was quite nervous cutting up my frame like that.I am sure it will be fine,the cb750 frame is pretty strong as is so I am confident.

nippon · « **Reply #10 on:** June 21, 2010, 11:51:31 AM »

I will never understand why anybody need such a kit and cuts down a frame for it.

nippon

MCRider · « **Reply #11 on:** June 21, 2010, 01:39:39 PM »

Quote from: nippon on June 21, 2010, 11:51:31 AM

I will never understand why anybody need such a kit and cuts down a frame for it.

nippon

In my case, just by accident and just for fun, I had a cam twist in two (probably my fault) and repaired it away from home without pulling the engine, could fix leaky headgaskets, I experiented with different cam shafts. replaced HD springs with stockers, could have stood to re-ringed it, etc, etc.

Depends on if you want to leave it alone, or mess with it.

You have a winkie, so are you just kidding?

bikerbart · « **Reply #12 on:** June 21, 2010, 02:27:20 PM »

Winkie?thats what my 4 yr old calls his penis.

Alan F. · « **Reply #13 on:** June 21, 2010, 04:04:04 PM »

Quote from: bikerbart on June 21, 2010, 02:27:20 PM

Winkie?thats what my 4 yr old calls his penis.

heh heh

bikerbart · « **Reply #14 on:** June 21, 2010, 04:08:45 PM »

so,MC,You can do all that without removing the engine?Am I missing something here?Did I just cut my frame for no good reason?You are kidding right?

MCRider · « **Reply #15 on:** June 21, 2010, 04:11:06 PM »

Quote from: bikerbart on June 21, 2010, 04:08:45 PM

so,MC,You can do all that without removing the engine?Am I missing something here?Did I just cut my frame for no good reason?You are kidding right?

Huh? You've misread me somewhere. Thats what you cut the frame for, so you can do all that without removing the engine. I have cut my frame and installed the APE kit, (no longer available) did to mine what you are doing.

BLUE71TURBO · « **Reply #16 on:** June 21, 2010, 04:38:18 PM »

Mine is cut also, and i have not had any problems with handling.

You can see the plug above the SU carb.

MCRider · « **Reply #17 on:** June 21, 2010, 04:50:40 PM »

Quote from: BLUE71TURBO on June 21, 2010, 04:38:18 PM

Mine is cut also, and i have not had any problems with handling. You can see the plug above the SU carb.

That solved the problem of mounting that CL450 gas tank. Looks good!

BLUE71TURBO · « **Reply #18 on:** June 21, 2010, 04:56:24 PM »

Quote from: MCRider on June 21, 2010, 04:50:40 PM

Quote from: BLUE71TURBO on June 21, 2010, 04:38:18 PM
Mine is cut also, and i have not had any problems with handling. You can see the plug above the SU carb.

That solved the problem of mounting that CL450 gas tank. Looks good!

If you look under the seat you'll see a chromed piece of square tubing. That helped to raise the tank up.

swellguy · « **Reply #19 on:** June 21, 2010, 05:21:31 PM »

Quote from: nippon on June 21, 2010, 11:51:31 AM

I will never understand why anybody need such a kit and cuts down a frame for it.

Access to covers without removing engine from frame?

stueveone · « **Reply #20 on:** June 21, 2010, 05:30:11 PM »

That's wicked!

axehole54 · « **Reply #21 on:** June 21, 2010, 06:34:16 PM »

I was lucky enough to have bought a 78k with the tubes cut and everything siliconed all to hell

going to build something myself to repair the frame similar to Carpy's system... but honda probably should have done something back then to make the head accessible

MCRider · « **Reply #22 on:** June 21, 2010, 06:49:38 PM »

How about a link to the kit. I've been thru Carpy's site and don't see it.

Ricky_Racer · « **Reply #23 on:** June 21, 2010, 07:13:33 PM »

I have Gordon's kit because I like the fact that it's nicely machined, welded in place and can be adjusted to provide some stress.

But the pictured kit in this thread begs the question: Why bother?

IF this solution is just as good, it would seem that you could take four pieces of tubing with the correct ID to just slip over the side rails , add two more pieces of 1/2" wide plate a couple inches long to support the short braces tieing the side rails to the backbone, figure 12 bolts and self-locking nuts and Badda-Bing, cut your old side rails and braces, slip over the four new short tubes, drill and bolt everything, and be done with it. Opinions?

Ha! Anybody want a kit for $29.95? Looks doable to me!

RR

MCRider · « **Reply #24 on:** June 21, 2010, 07:36:10 PM »

Quote from: Ricky_Racer on June 21, 2010, 07:13:33 PM

I have Gordon's kit because I like the fact that it's nicely machined, welded in place and can be adjusted to provide some stress.

But the pictured kit in this thread begs the question: Why bother?

IF this solution is just as good, it would seem that you could take four pieces of tubing with the correct ID to just slip over the side rails , add two more pieces of 1/2" wide plate a couple inches long to support the short braces tieing the side rails to the backbone, figure 12 bolts and self-locking nuts and Badda-Bing, cut your old side rails and braces, slip over the four new short tubes, drill and bolt everything, and be done with it. Opinions?

Ha! Anybody want a kit for $29.95? Looks doable to me! RR

Big Jay at APE said here on this forum that "Gordon's kit" was better than the one they used to sell. More Robust. I agree, I have both. I've lived with the APE kit installed and I have Gordon's Kit for the next project.

What you speak of is essentially an enhanced APE kit. For my current project, I had a machine shop develop some add on gussets to make the APE kit I'm using even stiffer.

The practical matter is simply...10s of thousands CB750s have the rails cut out with no harmful effects. Another 10s of thousands have replaceable frame rail kits. I think they simply make us feel better. Nothing wrong with that.

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Author Topic: carpy's frame kit (Read 10799 times)