Author Topic: Cognito Moto CB750 cafe with GSX-R forks (Read 102343 times)

RAZZ · « **Reply #125 on:** February 21, 2014, 04:18:29 AM »

Hi Devin

Great Work

If you decide to make a oil can swingarm please let me know - maybe with intake for a oil cooler in the left side

?

ZanVooden · « **Reply #126 on:** February 21, 2014, 07:21:16 AM »

Just a question, but would having a swing arm oil tank actually work?

My concern would be that by locating the oil tank in the swing arm as the initial drawings showed, the oil tank outlet to the engine would be below the engine inlet to the pump.

I don’t believe these pumps were designed to have a negative head pressure, and thus the pump would be starved of oil or it wouldn’t be able to meet the pressure required to engine.
My other concern would be when the engine is shut off, all the oil in the engine would drain back into the tank, including what is in the oil supply line to the pump. These pumps need to be primed with oil in order to start flow. They do not have a “suction” strong enough to pull the air out of the supply line and then lift oil.

CognitoMoto · « **Reply #127 on:** February 21, 2014, 07:52:39 AM »

Quote from: ZanVooden on February 21, 2014, 07:21:16 AM

Just a question, but would having a swing arm oil tank actually work?

My concern would be that by locating the oil tank in the swing arm as the initial drawings showed, the oil tank outlet to the engine would be below the engine inlet to the pump.

I don’t believe these pumps were designed to have a negative head pressure, and thus the pump would be starved of oil or it wouldn’t be able to meet the pressure required to engine.
My other concern would be when the engine is shut off, all the oil in the engine would drain back into the tank, including what is in the oil supply line to the pump. These pumps need to be primed with oil in order to start flow. They do not have a “suction” strong enough to pull the air out of the supply line and then lift oil.

Good questions. I know a few guys have done it without issue as far as I know. Maybe I'll build one to test anyways.

www.CognitoMoto.com

calj737 · « **Reply #128 on:** February 21, 2014, 09:25:07 AM »

You're gonna start a fight referencing Fuller's build! Many cranky members poo-poo'ed his build as all Show, No go!

Not I, mind you...

CognitoMoto · « **Reply #129 on:** February 21, 2014, 09:34:12 AM »

Quote from: calj737 on February 21, 2014, 09:25:07 AM

You're gonna start a fight referencing Fuller's build! Many cranky members poo-poo'ed his build as all Show, No go!

Not I, mind you...

Okay keep the world at peace...

Here is sohc4 members build

http://forums.sohc4.net/index.php?topic=70333.300

www.CognitoMoto.com

ZanVooden · « **Reply #130 on:** February 21, 2014, 02:47:44 PM »

Interesting. Maybe it will work.

I read through the build on the SOHC forum. He had an oil cooler that was positioned at roughly the same height as the stock tank. This would act as a standpipe provide head pressure to the pump.

I don’t really know much about Fuller’s bike. I know they run, so there must be some merit the idea of it work.

I’m still holding out hoping you build the rear seat hump oil tank you posted over the DTT site.

CognitoMoto · « **Reply #131 on:** February 21, 2014, 03:47:09 PM »

Quote from: ZanVooden on February 21, 2014, 02:47:44 PM

Interesting. Maybe it will work.

I read through the build on the SOHC forum. He had an oil cooler that was positioned at roughly the same height as the stock tank. This would act as a standpipe provide head pressure to the pump.

I don’t really know much about Fuller’s bike. I know they run, so there must be some merit the idea of it work.

I’m still holding out hoping you build the rear seat hump oil tank you posted over the DTT site.

I figured the center one was a good start. I'll do the seat one next. Haven't figured what size to make it

www.CognitoMoto.com

CognitoMoto · « **Reply #132 on:** March 05, 2014, 07:00:49 AM »

The first oil can is completed.

I've posted them to the site if anyone wants to get in on the pre order.

http://bit.ly/1lyIaAx

www.CognitoMoto.com

SOHC4 Cafe Racer Fan · « **Reply #133 on:** March 05, 2014, 07:59:56 AM »

Looks great Devin. What's the capacity/volume?

CognitoMoto · « **Reply #134 on:** March 05, 2014, 08:23:40 AM »

Quote from: CB750 Cafe Racer Fan on March 05, 2014, 07:59:56 AM

Looks great Devin. What's the capacity/volume?

It will hold over 3.25 qts of oil below the fill cap.

www.CognitoMoto.com

jojo · « **Reply #135 on:** March 05, 2014, 10:09:19 AM »

Devin- I say you tackle some nice velocity stacks on solidworks next!

are the 750 and 550 carb outer diameters the same?

CognitoMoto · « **Reply #136 on:** March 14, 2014, 07:51:50 AM »

So it's been a while since I posted. We have been in the process of moving Cognito Moto to a new location.

Working on the retail section.

www.CognitoMoto.com

www.CognitoMoto.com

CognitoMoto · « **Reply #137 on:** March 14, 2014, 07:58:56 AM »

I was back and forth with the tank and had been working with Cliff Meyer of Meyerbuilt MetalWorks on some other stuff so I convinced him to make me an aluminum tank. The core shape was based on the CB500t tank with a little extra touches. The shape of the 500t tank really flows with the seat but I didn't want to use the cb500t tank again.

I'm going to Indiana this weekend to pick of the frame and tank. Very excited. I'm going to try and finish this bike in 3 weeks.

www.CognitoMoto.com

SOHC4 Cafe Racer Fan · « **Reply #138 on:** March 14, 2014, 10:58:02 AM »

Devin,

Great looking aluminum tank. Please post some progress shots of the CM shop as it comes together.

Don

Trad · « **Reply #139 on:** March 14, 2014, 01:45:50 PM »

That tank looks great!

koendd · « **Reply #140 on:** March 14, 2014, 02:18:29 PM »

damn, what a build!
would be great to have guys like you over in europe for parts...
To bad we have to pay ridiculous amounts of taxes when we buy stuff in the US..

one question though, that loop, did you make it yourself or where did you get it? Looking for the same one for my 750F2.
How many degrees upswept is this?

thx,
Koen

snowman · « **Reply #141 on:** March 15, 2014, 11:06:55 AM »

I don't why, but none of the pics are displayed. What am I missing out on?

Sent from my iPad using Tapatalk

CognitoMoto · « **Reply #142 on:** March 15, 2014, 12:01:15 PM »

Quote from: snowman on March 15, 2014, 11:06:55 AM

I don't why, but none of the pics are displayed. What am I missing out on?

Sent from my iPad using Tapatalk

This show? I'm loading them from the app

www.CognitoMoto.com

calj737 · « **Reply #143 on:** March 15, 2014, 12:09:47 PM »

They have all appeared normally for most readers. Might be his browser not loading them completely.

snowman · « **Reply #144 on:** March 15, 2014, 01:00:02 PM »

One word, sweeeet. Thanks

Tsunami · « **Reply #145 on:** March 15, 2014, 07:53:44 PM »

Devin, Looking good keep up the great work.

jpfrk2001 · « **Reply #146 on:** March 18, 2014, 06:00:12 PM »

Devin, Your new shop is looking good. Build looking great.

Also, I got the parts already. Thank you. The packaging is definatly top notch professional. First time seeing that each part got a nifty cool bag with your logo on it. Definatly cool!!

CognitoMoto · « **Reply #147 on:** March 18, 2014, 11:04:58 PM »

Quote from: jpfrk2001 on March 18, 2014, 06:00:12 PM

Devin, Your new shop is looking good. Build looking great.

Also, I got the parts already. Thank you. The packaging is definatly top notch professional. First time seeing that each part got a nifty cool bag with your logo on it. Definatly cool!!

Haha thanks! Glad you like it. When people are happy it makes it all worth while.

www.CognitoMoto.com

CognitoMoto · « **Reply #148 on:** March 19, 2014, 07:01:08 AM »

Making some progress

Bead blast then Black powder coat

www.CognitoMoto.com

SOHC4 Cafe Racer Fan · « **Reply #149 on:** March 19, 2014, 05:48:09 PM »

Devin,
Your parts look exceptional. Love the GSXR hub I purchased.
Don

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Author Topic: Cognito Moto CB750 cafe with GSX-R forks (Read 102343 times)