Author Topic: Build of CB750 K2 1975 - Europe had K2 until 1975 - Engine started feb 17 2019 (Read 51967 times)

JoeCooley · « **Reply #100 on:** January 21, 2018, 12:41:21 AM »

Good guys over there at Z1. I used the same switches. Just know that there is no high-lo switch. I swapped to a very bright LED low beam so I'm not worried.

Terry in Australia · « **Reply #101 on:** January 21, 2018, 02:38:43 AM »

Yamiya's repop handlebar switches are better quality Per, and cheaper too. Your K2 should have the older "Rhino Horn" top triple clamp, which means that the gauges in your pic won't fit. If you've got a pair of old K2 gauges, Marcel at CB750faces.com in Holland can make them look like new, for a pretty reasonable price. Cheers, Terry.

PeWe · « **Reply #102 on:** January 21, 2018, 03:15:36 AM »

Hi Terry. I have looked for fresh K2 gauges (speedo must be km) with no success.
No problem to use the K3 looking gauges to start with. Really old gauges might be rotten inside and not fully functioning. The tank I'll use is not correct either, K4 style I have used a short while on my K6 (photo)
I have NOS gauges to my K6 that I might let stay in their Honda boxes. NOS seat I bought for my K6 will be used on this K2 build.

I checked Yamiya for switches. They have expensive Honda, the cheaper does not look better than Z1parts.
Hi Joe, right switch has light switch Off, Lo, Hi as I see it. Sure your used this one?
https://z1parts.net/CB750-CB400-Right-Control-switch-35300-300-674/

I'm not clear why the K2 got the additional off switch on left side. Light flashing instead of horn?

This K2 will look for future good tank set with K2 style graphics and side cover 750 Four badges. I might order the side cover badges from Z1parts too. Replace the later badges.
750 purists will scream, old side cover badges with later tank decals!

I have a good tank with no rust that I can paint in K2 style (black tank). It has its Honda badges attachment covered with filler, hopefully OK under.

Stev-o · « **Reply #103 on:** January 21, 2018, 11:44:54 AM »

Pewe - my early K2 has a turn signal cancel switch on the left control, apparently a 1 year switch. Is that what you are referring to?

PeWe · « **Reply #104 on:** January 21, 2018, 01:24:56 PM »

Hi Stev-o,
The switch that I intend to buy has that button. I have a buzzer I'll intend to use.
https://z1parts.net/35250-341-672-CB750K2-Left-hand-control-switch/

It is the extra HL-OFF switch to be mounted beside left switch. I guess it will work without it. But it might be a K2 detail to add when it is not much extra $.
https://www.cmsnl.com/honda-cb750k2-four-european-direct-sales_model14369/switch-lighting_35150300730/#.WmUDqKjibIU
Switch has no item no here but visible
https://www.cmsnl.com/honda-cb750k2-four-european-direct-sales_model14369/partslist/F02.html#results

Right hand switch has Light Off, Lo, Hi
https://z1parts.net/CB750-CB400-Right-Control-switch-35300-300-674/

PeWe · « **Reply #105 on:** January 23, 2018, 10:45:42 AM »

The K2 frame got clamps today. 754 (Franks weldless) Perfect when it can be future thoughts about welding the frame together again, no material missing only the thickness of the saw blade. This bike will be a close to stock bike.

It was already cut by PO, std pipes were intended to clamp parts together with 2 bolts each. Franks weldless clamps do it better. I need to make 2 brackets for the bracing since the holes done by PO do not fit Franks brackets with the kit.
I'll find alu or steel plates I cut in correct size, drill holes and thread it.

PeWe · « **Reply #106 on:** February 07, 2018, 03:58:43 AM »

New tires arrived and ready to be mounted. I had to fix the rims weld point as it has a sharp edges and almost burrs not good for the tube. Grinded it smoother with a 240 paper and painted it smooth with my engine paint spray can, 2 layers.

I'll try the zip tie method doing it myself. My last tire change ended up in ugly marks on the perfect rear rim. Balance wheel will be my job from now. I have to find tires easy to remove in my garage.

Tires here is Heidenau K44 and K36 in std sizes. 3.25-19 and 4.0-18.

Terry in Australia · « **Reply #107 on:** February 07, 2018, 10:04:14 PM »

That's a nice wheel Per, and I'm sure those German(?) tyres should be good too. I'm thinking of cutting my frame and making my own frame kit, I like Franks, but I'll bolt mine thru the frame tubes to maintain the structural integrity. Cheers, Terry.

PeWe · « **Reply #108 on:** February 08, 2018, 03:08:12 AM »

I need to polish the other parts matching the wheels.

Gordons frame kit bolt it together completely. More cutting and welding though. I have a set but did not use it on this build since it is easier to weld it together if bike will find a CB750 stock purist. Today small gaps after the saw blade curring the frame.
Franks clamps sit very tight and will not allow flex in the tubes lenghts.

My K2 frame and cut part have holes for bolts since the PO had a frame kit with 3-4" long tubes going over the cut and bolted wuth 2 bolts, one on each side. That solution will not be as rigid as Franks.

I hope to rubberize the wheels asap. Need longer and stronger zip ties.

PeWe · « **Reply #109 on:** February 08, 2018, 10:40:02 AM »

Rear tire entered the rim! Zip tie method was a huge waste of time!

The old fashion way worked fine. Greasing up the tire were rim will get contact, both sides with old type of green soap used for cleaning floors.
My new tire tools are really nice. Should have bought 1 more, total 3. 2 works too.
Tire in correct direction too!
Front tire another day!

mscuiletti · « **Reply #110 on:** February 08, 2018, 10:43:59 AM »

That looks so great. You could eat off of those!

PeWe · « **Reply #111 on:** February 08, 2018, 12:24:07 PM »

Yes, the wheels are rather clean and shiny!
I hope I'll keep up the polish when bike is back on the road again.

PeWe · « **Reply #112 on:** February 10, 2018, 06:43:47 AM »

Front tire done today. I need to arrange a better method, on the floor makes it extra harsh for my back.
This time tire assembly lube. I read somewhere that soap might get too slippery again when raining and tire will rotate on rim.
This K2 with std hp is probably no problem. Next tire change will be rear for my K6 with lots of more torque.
The tire ass lube I found sold in 2 kg buckets only. I have for all future tires since it is not thin. A few strokes with a brush is enough for each side of the tire. It will last forever.

Terry in Australia · « **Reply #113 on:** February 10, 2018, 02:59:46 PM »

Beautiful work Per, I'll be interested in how those Heidenau tyres work, (especially in the rain) I've never had a bike with them on it? Cheers, Terry.

PeWe · « **Reply #114 on:** February 11, 2018, 12:03:54 AM »

I have read only good about those tires. When searching, the BMW forums are most common. I found one thread where a Kawasaki 1000 (late 70's or early 80's) owner was pleased with this combo front and rear.
Good look for these old bikes and correct sizes too.
http://en.reifenwerk-heidenau.com/artikel/2_UeBER-HEIDENAU.htm

I'll might use it on my extra rear wheel to be used on my K6 with more power. I hope the tire has long life and good enough grip. Sudden loss of all grip is most important no-no.

I remember Continental K112 that suddenly lost all grip in corners when pressing it a little.
A biker friend since late 70s have same bad memories of K112.
Even the slippery Avon Roadrunner was better since it lost grip earlier and not very abrupt.

Stev-o · « **Reply #115 on:** February 21, 2018, 02:32:07 PM »

Quote from: Terry in Australia on February 10, 2018, 02:59:46 PM

Beautiful work Per, I'll be interested in how those Heidenau tyres work, (especially in the rain) I've never had a bike with them on it?

+1. Heidenau not popular in U.S. only Heineken !

Terry in Australia · « **Reply #116 on:** February 21, 2018, 05:42:34 PM »

+1 on the Heineken Steve, although it's caused me to lose traction once or twice!

PeWe · « **Reply #117 on:** February 21, 2018, 09:54:27 PM »

I did not see Heidenau as a tire of my choice, but reading what others has experienced with them helped me.
I thought they made old vintage looking tires for old vehicles as no 1 only.
It will be interesting to test them. I plan to use another one on my extra rear wheel. The look is good, hopefully longer use and good enough grip. My K6 can make the rubber to disappear when I'm in twisting mode.

Heineken is Dutch, Heidenau is German as Metzeler (owned by Pirelli), Contenental

Terry in Australia · « **Reply #118 on:** February 21, 2018, 10:01:27 PM »

Thanks Per, I got smashed on Heineken in Amsterdam in 1974, drinking and smoking weed with American draft dodgers and crazy Dutchmen, (and one crazy German) great memories!

PeWe · « **Reply #119 on:** February 22, 2018, 03:01:41 AM »

Quote from: Terry in Australia on February 21, 2018, 10:01:27 PM

Thanks Per, I got smashed on Heineken in Amsterdam in 1974, drinking and smoking weed with American draft dodgers and crazy Dutchmen, (and one crazy German) great memories!

Teryy, that digs up nice memories from Thailand in the late 90's. Drinking Heineken and weeding the local brands with a local hot tight chick! Years before similar action but local beers!

Stev-o · « **Reply #120 on:** February 22, 2018, 06:34:23 AM »

Quote from: PeWe on February 21, 2018, 09:54:27 PM

Heineken is Dutch, Heidenau is German as Metzeler (owned by Pirelli), Contenental

Yes, knew all that. I bought Continental for my Kawasaki and was disappointed to find out they are now made in Korea. I'm sure it's still a good tire though.

Henning · « **Reply #121 on:** February 23, 2018, 11:25:15 AM »

Hej PeWe,
those are the exact same tyres I have on my K1, they're bigger and wider than you'd expect looking at the sizes. Find them very balanced in the corners, the bike neither tries to sit up or fall down, so much so that I feel I can let go of the handlebars. That's in contrast to the weedy Yokohama's I used back in the day where I really had to pull on the handlebars to get it to corner, and a less than fortunate set of Continentals that I used on the current bike where it literally fell into corners, very unpleasant. Still, not ready to recommend them yet as I feel a lack of confidence cornering, but that could be down to the sh!tty wheels and wheel bearings I still run :-) The rest is sorted. So, interested to hear your evaluation when you get that far.

PeWe · « **Reply #122 on:** February 24, 2018, 01:52:39 PM »

I'm working on an extra rear wheel for quicker tire replacement. Always have a rear wheel with fresh tire.
I'll use a Heidenau on it since it has the right look for a CB750. My K6 will get it after it has worn out the Dunlop Streetsmart 4.0-18 that so far only have done 1500km. Lets see if it will survive over 5000km in total.

PeWe · « **Reply #123 on:** March 23, 2018, 09:43:35 AM »

More K2 parts..
Found a complete K2 gauge set with the upper yoke now arrived to my garage. Rhino horn is a must on a K2 since that is a vital part of the bikes personality. It's bad enough it will get a K4 designed tank. It will get a k2 striped tank later on with correct side cover emblems too.

US speedo (mph) that will be replaced by a km/h speedo. New faces, glass and upper black parts ordered from cb750faces.
The gauges sit a little bit loose so the cush rubbers need to be replaced.
The chrome covers I got with the km/h speedos look OK with minor patina. New ones of that model cost a fortune, around $200US for a set!!

Gauges are not a cheap detail. I had in my mind to use my old K6 set.

Terry in Australia · « **Reply #124 on:** March 23, 2018, 04:29:21 PM »

They look great Per, and you gotta have a rhino horn top triple on a K2, it just wouldn't look right without one!

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Author Topic: Build of CB750 K2 1975 - Europe had K2 until 1975 - Engine started feb 17 2019 (Read 51967 times)