Jrkk's 1100 cafe build

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Re: Jrkk's 1100 cafe build

Postby jrkk » 25 Jun 2019, 23:10

Track day done, first day was ok, second was raining , so we pack our bikes and left home.
I finally received pilotjets and plan is install them tomorrow. Let's see.
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Re: Jrkk's 1100 cafe build

Postby jrkk » 27 Jun 2019, 23:35

Couple of non related pics,
I meant to go test ride today with carbon edit, but weather was against me, and I got stuck with my track bike. Little fine tuning with yamaha's yms software. Nice when you can do all with computer.
Tomorrow I will take zephyr for a ride.
Attachments
20190628_013217.jpg
20190628_013250.jpg
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Re: Jrkk's 1100 cafe build

Postby jrkk » 29 Jun 2019, 18:39

Ok, so I was wrong about pilot jet size. 30 was way too big. Idle is now 10.5 afr and if I turn fuel screw fully close it won't rise upper. Just of idle cruising is now 12 afr and 1/2 throttle about 14, wot is 10.
So, I need new pilot's, needles and mains. It's more than possible that jets what I ordered, is wrong size, but I figured that it's better to order them all at the same time, because of shipping time and costs.

So now there is coming 20 pilot's,(one size bigger than stock) richest needles and 130 mains ( smaller than stock 135).
Bike runs good though, but if my afr gauge is showing about right measurements, then it's no way near where it supposed to be.
jrkk
 
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Re: Jrkk's 1100 cafe build

Postby jrkk » 07 Aug 2019, 20:53

My mikuni supplier has failed me and can't deliver jets.
D'oh, fortunately it's ritch side so i can ride with it.
Meanwhile I made some fork protector's. There was always insects and other derbies, so fork seals was in danger to damaged.
20190802_232110.jpg

20190802_232121.jpg
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Re: Jrkk's 1100 cafe build

Postby jrkk » 10 Jan 2020, 19:22

It's been a while since last post. I had problems with carbs and season ends mid September.
So I will continue carb tuning next season.

This winter's to do list was long, but I think that I'm not gonna do all of my plans.

I started with rear brake mod, copied from Gazz.
https://www.gazzz-garage.com/2016/06/10/about-seven-fifty-cafe-zephyr-rear-brakes/
20200109_191708.jpg

This was an pretty straight forward, and clean rear look.
20200109_191756.jpg

Old caliper is now for sale. :)

Then I started to play with Acad and 3d printer :?
to figure out new top yoke model.
Sliced model is now ready and I'm trying to find cnc guy who can do this for me.
20191124_222022.jpg

Fork roundings is cutted cos printer max dimensions.
And thin slice because of long printing time.

I was supposed to fabricate new seat as well, but I think I'm not very motivated to it.
I definitely must do valve clearance's.
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Re: Jrkk's 1100 cafe build

Postby Ivor » 10 Jan 2020, 23:31

looking great jr . them rear paddock stand bobbins you've put on the rear swing arm , were they easy to fit ? just drill and tap , or did you have to beef it up a bit ? need to put some of them on mine
tapeworms are hungry pets !
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Re: Jrkk's 1100 cafe build

Postby jrkk » 10 Jan 2020, 23:48

Hi Ivor.
I did it easy and "dumb" way, just drill 5mm hole then 6mm threads, then with strongest loctite to secure them.
There should be welded nuts under swing, to be proper.
Those has been used maybe hundreds of times and no any kind of problems. Although swing is weaker now.
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Re: Jrkk's 1100 cafe build

Postby Ivor » 11 Jan 2020, 00:31

ah cheers i'll go order some bobbins and have a go :)
tapeworms are hungry pets !
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Re: Jrkk's 1100 cafe build

Postby jrkk » 11 Jan 2020, 18:43

I also designed bigger intake Airbox cover, never printed it, so not sure about it.
Top yoke designin was pita, as there was so many angles.
If someone want to try my airbox cover mod, I can share stl.
Attachments
Screenshot_20200111-193457_Fast STL Viewer.jpg
Screenshot_20200111-193524_Fast STL Viewer.jpg
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Re: Jrkk's 1100 cafe build

Postby dcf750 » 12 Jan 2020, 16:17

Hi, how do you generate the .stl files?

I know 3D printing could be great for making parts like side panels etc, but was not sure how you would generate an accurate .stl image. I realise also then the bigger the part, the more expensive the 3D printer would be. Interesting technology :|
Den

Zephyr 750 C4
Zephyr 750 C3
————————-
Z1000-A2 1979
KH400-A4 1977
KH250-B1 1976
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