Any updates on this build?

 

CB125, NOS Genuine OEM Honda Twin 125 CB125 K2 K3 Speedometer Tachometer RPM Assy MPH | eBay

 

Ronny I've never seen a CB160 with a tachometer on them so think you can rule that out.All the ones I've ever seen on 160's were same shape but like this. i.e. just a speedo.

Regards Chris.

 

That unit came up in a prior Bomber build thread. Maybe it was maduncle's build? I can't remember what bike it was from, but it was small displacement.

 

Can have been previously in this thread, as I mentioned I haven't visited HT for for a long time. Information I got might identify the meter as possibly a CR93, early CB125 and CB160.

 

I know it's not a Bomber unit but does anybody recognize the speedo tacho unit and know what bike it's from?

 

 

Seems like there are circa 10 mm difference between the older drum brake forks and the newer disc brake ones. Nothing some distances and a slight adjustment with a hammer couldn't overcome.


Mock up of '66 BB front end. Version 1.0 is going to be a real bitsa. Front forks are CB450 K5, fork ears (probably) early CL450, headlight bucket CB125 and Speedo/tacho unit CB160 (?). Since the '66 CB450D purchase went south I have to work with what I have to get this Bomber on the road.

 

Seems like there are circa 10 mm difference between the older drum brake forks and the newer disc brake ones. Nothing some distances and a slight adjustment with a hammer couldn't overcome.


Mock up of '66 BB front end. Version 1.0 is going to be a real bitsa. Front forks are CB450 K5, fork ears (probably) early CL450, headlight bucket CB125 and Speedo/tacho unit CB160 (?). Since the '66 CB450D purchase went south I have to work with what I have to get this Bomber on the road.

View attachment 124745

Ronny,
Did the Swedish Honda CB160 models come with the speedo & tach. all in the same meter similar to the CB77 Superhawk ? I have only seen the speedo meter in the USA CB160 models.

 

I made about 181mm on my later ones. Was told earlier ones were the same, but haven't checked the K1 ones yet

 

Ronny, the nearest I can measure my K5 is 7.10 Inches or about 180 mm. It is difficult to measure without disassembling the bike. I measured across the top of the bridge, the tangent points of the cap nuts. I believe all of the disk brake models have the same fork bridges.

 

Am I correct in that the "older" triple trees has circa 175 mm between the fork legs while the "newer" ones has circa 185?

 

Welcome back! I got a good chuckle out of that fly by!

 

Looking good Ronny

 

Wow, that is one quiet bike, super smooth Nice work on the welding, impressive.

Real nice to see you back at it Ronny. I had a long period off as well, life has a way of inflicting its own will on you and we have to deal with it and ride it out. Makes coming back all the more refreshing though.

 

Hi Ronny, good to hear from you. I don't see the pictures either. Keep us posted.

 

No, I have not fallen off the face of the earth. It's just that life sometimes throws you a curved ball that you have to go out in the woods to find.

Not much have happened with the Bomber since I last wrote. I bought a complete '66 450D, yes 450D, this spring with only engine and exhausts missing. Frame number was very close to mine so I told the seller in Jersey Shore to sell his frame on Ebay. That way he would earn an extra buck and I wouldn't have all the hassle with importing and registering a complete bike. I was so happy as I now had most of the Bomber parts I was missing. Five months later there was still no parts on their way so I had to contact Paypals legal department and luckily got my money back.


First things to fix is the sawed off rear frame loop and steering bearing seats.

My welding skills are not great but I think the replica rear frame loop I made turned out quite well. Not very easy to fabric as the profile is oval (think Milwaukee Mile) but the ends are tri ovals (think Daytona).

I scavenged the steering bearing seats from an old K5 frame I had. It was already modified so I let it donate some parts before it went to the scrap yard (frame tubes was for example used to elongate a friends old 50's Triumph swing arm but that's another story). My friend and garage buddy Jorgen (master welder for over 30 years and magic metal worker) helped me welding the bearing seats as I didn't want them to come loose after a hard bump or heavy brake.

So now, when the frame, is finished it's time to start looking at the 500T engine. I stated in the beginning that it'll be a 600 cc monster but since I don't know anything about the engine I thought it would be wise to assemble it in stock configuration the first season to verify that it's healthy. That way I will also be able to notice the difference between stock pistons and THR 74mm high compression ones.



First test ride on the Bomber.

Is it only me that can't see the photos above?
EDIT: They seems to be visible now.

 

Hi Ronny, I'm Liam, new member here, I just found this thread, are you still building this engine? I am building a very similar engine, using 500T bottom end with 450K4 cylinders and head with a THR 74mm piston. Very curious to see how you are going with it and if you are going to complete it. What you are planning is exactly what I want, basically a low revving torque monster with a broad torque curve and peak torque lower in the RPM range than the stock 450 (although I see jensens dyno run has almost peak torque at 2700rpm and pretty flat right through to the peak at higher rpms which is very encouraging, hope to maintain that curve even after all these modifications).

I'm very tempted to deck the cylinders 2mm lower to have the same piston deck height as the stock 500t piston, but this really bumps the 74mm THR piston compression right up to about 12.7:1, I think it's just too much for this old air cooled engine for street use, even if it had a cappellini oil pump and oil cooler this thing would be just too hot and hard to tune with 12.7:1 CR, I think I'll have to get the piston crown machined down to get back to about 10.5-11.5:1 CR.

Love the name, brutus, very apt. I was thinking of calling mine "One-two punch" because of the rapid 180 degree firing order being like two punches in quick succession, and this being a 557cc it will pack a bit of a punch!

 

Ronny,
The CB500T's have always been regarded by me as a 'Torque Monster' and for you to create a 600cc version of it I Now understand why you call the 'big dog' Brutus !

 

Bilbikek411, it will hopefully be a low revving engine with good torque on low revs.

Rod, good to hear from you my friend! Very kind of you to offer me a K2 frame loop but unfortunately the Bomber loop is not similar to any other 450 model. It's more like a tube pressed into an oval shape and then turned into a loop. Very strange design. I will have to try to make one by hand. Regarding pistons I'm going to use 74mm over size ones but again, thanks for your kind offer.

 

Ronny i have a rear loop that was removed from a K2 if that is the same or similar, it's yours for the cost of postage, i also have some 0.75 CB500t NOS pistons…

PM me

Rod

 

Ronny,
Will you set it up more for 'overdrive tall final gearing' ? or will that motor be able to redline ?

 

'Brutus' is going to be a Big Dog when you're finished w/ the project , What will you have to feed that machine(aside from feeding him 'many long Rides') to keep it happy ?? :grin:

 

Besides petrol it will probably occasionally suck in a small bird or two through the carbs.

 

Thank you very much Austin for your info and picture. Very valuable info to me!

 

Cool looking build. Looks like you have the same delema as I. A bomber frame with almost enough parts

I measured the Thickness to be 8.8 mm on the edges. It looks to be flattened tubestock because of the weld and it's thick on edges thinner in center. At the tube at the weld is 16 mm thick.

I'm measuring a height of 64 mm off of the top of the tubes

I put up a picture to show you what I mean about the weld

j

 

Sad thing is - so many folk don't know they are hacking up a black bomber until after.

 

I suspect very few youngsters have the money to hack up Bombers Maduncle.

Anybody here on the forum that has a bare CB450 KO Black Bomber frame and are willing to help me measure the inner height and thickness of the rear frame loop/bracket since mine is cut off?