GS750 1978 Cafe 'Project Doris'

[Charlie G]

As in down under Dan? Where in the South East are you heading exactly?

I was thinking England.

cg

[pete]

I was thinking England.

cg

Yeah just re-read it and I reckon you're probably right Charlie...

[Dec79]

That is an awesome cafe Zooki...
Just incredible. really nice work, and a well executed build, be proud of that for sure.
Just one more ppoint on the chain guard....if it don't make it go faster, ya don't need it.

Yes I have my bike fitted with 35mm clipon bars aswell, I CAREFULLY drilled and tapped the steering stop on the frame neck where the lower tripple clamp comes in contact, I then used a small stainless hex bolt to limit the maximum steering lock.

Cheers dude, I have looked at this option and we're currently weighing it up against some form of clever bracket coming down from the top yoke. Gonna be fairly limited steering lock whatever way we do it!

[Dec79]

A few updates from today. I've always liked the look of Velocity Stacks as opposed to pod filters, I've read a few articles suggesting they may not run as well... but you know what, they look damn sexy!! We covered off the oil breater with a neat K&N jobbie tucked nicely towards the top NSF of the engine. Exhaust end can fitted too

In other news I sourced a handlebar switchgear refurb kit from eBay and fitted to the freshly painted switches, they look brandnew. The throttle linkage is run, timing set and all the electrics are working as they should. So, there was only one thing left to do.... connect up the fuel lines and FIRE HER UP!!!!

I'm amazed to report that she started on the button and idled unbelievably well considering we were using fairly basis carb settings lifted from forums such as this one. We started with the air screw 2 turns out and reduced to 1.5. She's running 120 jets, although not sure that make a differnence on tick over? She ran lovely for 5 mins until she ran out of petrol

Next jobs:

• Steering lock
• Clocks
• Lower headlamp by an inch or so
• Fit new stainless fork caps
• Investigate 'spongey' front end - new progressive front springs?
• Paint brake levels, run lines
• Start saving for calipers, disks.... nitrous, Ohlins rears?!

Enjoy the pics

[MisterCinders]

Are you going to change that rear brake pedal? Doesn't look like you can use it in that position, unless your ankle is double-jointed. Also, the linkage won't deliver much pressure to the brake without more of an angle.

I guess that will sort out when you put the rear brake on.

[nvr2old]

The bike is looking real nice. Anxious to see the final results. Are you going with a front fender and a rear subfender? The velocity stacks look great, but as I found with my 1000S, the carbs will probably need serious re-jetting for the engine to run at anything other then idle. Mine ran great at idle, even as you revved it, but under load, it fell flat on it's face. Nothing above 3,000 rpm. I'm sure it can be worked out, many have, I just didn't want to deal with it and went back to the stock airbox. Ran perfect right off the bat that way. Doesn't look nearly as cool, though.

[azr]

Damn, that bikes looks fantastic!! can't wait to hear her run.

[Big T]

Beautiful work

I love the vapor blasting, I've been messing around with that lately

As far as your carb tuning goes, you mention only one of the screws

Fuel "underneath" should be about one turn out

Air "side" should be about 2 turns, then use the high idle method to fine tune

[wally]

What beautiful, beautiful bike!

[Bevo]

Great job, it looks fantastic!

I like the stacks but not that open rear fender area, looks like a strait shot for water and crap right into your carbs. A well placed sheet metal panel behind the engine will keep the look nice and clean.

[Dec79]

Are you going to change that rear brake pedal? Doesn't look like you can use it in that position, unless your ankle is double-jointed. Also, the linkage won't deliver much pressure to the brake without more of an angle.

I guess that will sort out when you put the rear brake on.

Hahah, yes the rear Brake Master Cylinder is not fitted yet so the pedal hangs loose

The bike is looking real nice. Anxious to see the final results. Are you going with a front fender and a rear subfender? The velocity stacks look great, but as I found with my 1000S, the carbs will probably need serious re-jetting for the engine to run at anything other then idle. Mine ran great at idle, even as you revved it, but under load, it fell flat on it's face. Nothing above 3,000 rpm. I'm sure it can be worked out, many have, I just didn't want to deal with it and went back to the stock airbox. Ran perfect right off the bat that way. Doesn't look nearly as cool, though.

Thanks buddy, I will fit some sort of cut down front mud guard - probably painted black; as for the rear it'll be left minimalist. I've heard mixed results re the bellmouths too... I have jetted to 120's and had a quick fiddle with the settings although will need to get it roadworthy so I can test it under load. I'm prepared to take it to a specialist tuners / rolling road if I can't get it running spot on!!

Damn, that bikes looks fantastic!! can't wait to hear her run.

Cheers bud, video coming soon

Beautiful work

I love the vapor blasting, I've been messing around with that lately

As far as your carb tuning goes, you mention only one of the screws

Fuel "underneath" should be about one turn out

Air "side" should be about 2 turns, then use the high idle method to fine tune

Cheers buddy, great advice re the carb tuning - I'm a newby to this so will defo be following your recommendations.

What beautiful, beautiful bike!

THANK YOU

Great job, it looks fantastic!

I like the stacks but not that open rear fender area, looks like a strait shot for water and crap right into your carbs. A well placed sheet metal panel behind the engine will keep the look nice and clean.

THANKS!! All feedback appreciated, although I spent alot of time trying to make the rear end as clean and un-cluttered as possible, I know the rear tyre will more than likely flick crap all up the back end.... although being a fair weather rider hopefully that'll be controllable

[Toasty]

Your bike is amazing, I'm doing a bunch of work on my 550 and I hope it comes even 1/2 as nice as yours . What gauge steel did you use for the underseat pan?

[Dec79]

Quick update, not been on here for a while.

Been pondering what to do re the steering lock issue (clip-ons hitting the tank). A few peeps mentioned various ideas including a threaded bolt on the original stop / frame - I'm sure many have made this work however I just couldn't see how this would be strong enough for my application. Dad and I started looking at the upper steering yoke and the possibility of a bracket to control movement using the inside tab which comes off the top of the headstock. After many hours messing about with cardboard templates we managed to cut the bracket from 3mm thick ally, and give it a nice polish up. 2 stainless allen bolts and bobs your uncle, steering lock problem sorted. The underside shot shows how the design works.

Next jobs on the list, front indicators, front/rear brake master cylinder re-furb, billet brake callipers (est March/April), number plate mounting, bar-end mirror, tuning etc etc.....


HAPPY CHRISTMAS EVERYONE

[Dec79]

Your bike is amazing, I'm doing a bunch of work on my 550 and I hope it comes even 1/2 as nice as yours . What gauge steel did you use for the underseat pan?

Not sure bud, I think it was 2mm thick?

Dec

[Road Rash]

I don't mind saying, dude, I am SOOOOOO in love with your bike! Doris is everything I hope my build becomes. You've set the bar real high with her, though. Good on you!