Topic: The Amalgam: honda past meets present, take 2! or 3?

[SOHC4 Cafe Racer Fan]

I would think it would be fine on the street, and with the weight reduction you might even be able to track it.

[jag767]

I doubt itll ever see the track, but who knows. I plan to submit it to the handbuilt show. Made a little headway

[scottly]

Wow 250-270lbs, that is a VERY ambitious goal!    Esp. considering the CB450 originally weighed about 450#, and the CBR500R is about the same.

Have you weighed the CB450 frame?     1970's steel motorcycle frames are pretty heavy for what they are.

To hit your weight goals, a custom-built crome-moly frame is likely in order.

What does the CBR500R motor + cooling system weigh?
How 'bout your wheels (and tires)?

I'm not trying to put water on your fire.   

Consider that many modern air-cooled single cylinder dirt bikes weigh about what you're shooting for.

Good luck -- I'll keep watching your thread.   I'm interested in seeing what you come up with!

Should have said dry weight lol. Motor is 115, frame after I rebuilt it is very light, have to weigh it. I'd guess 25 pounds tops. The 33mm front end is less than the 35mm thant came on that bike. And the aluminum rims will help some. I think I will be close. Keep in mind, no frills anywhere, I will do a tiny headlight, no signals, small tank, the seat weighs nil since it's plastic, and all the little components do add up.

Just for comparison, the single cylinder '82 XR500 had an advertised dry weight of 270 pounds, and it had aluminum rims, a tiny headlight, a plastic tank, no battery, starter motor, or turn signals, with a motor that weighed 90 pounds.

[Lostboy Steve]

Wow 250-270lbs, that is a VERY ambitious goal!    Esp. considering the CB450 originally weighed about 450#, and the CBR500R is about the same.

Have you weighed the CB450 frame?     1970's steel motorcycle frames are pretty heavy for what they are.

To hit your weight goals, a custom-built crome-moly frame is likely in order.

What does the CBR500R motor + cooling system weigh?
How 'bout your wheels (and tires)?

I'm not trying to put water on your fire.   

Consider that many modern air-cooled single cylinder dirt bikes weigh about what you're shooting for.

Good luck -- I'll keep watching your thread.   I'm interested in seeing what you come up with!

Should have said dry weight lol. Motor is 115, frame after I rebuilt it is very light, have to weigh it. I'd guess 25 pounds tops. The 33mm front end is less than the 35mm thant came on that bike. And the aluminum rims will help some. I think I will be close. Keep in mind, no frills anywhere, I will do a tiny headlight, no signals, small tank, the seat weighs nil since it's plastic, and all the little components do add up.

Go with a Lithium battery.    They weigh practically nothing.

Are you doing clip-ons or regular handlebars.    Definitely go with aluminum there too!

.

Yes and yes! I honestly think it's doable. Btw it's a cb350 front drum, and cb350f rear wheel since I have spares. And the exhaust will be very light, i'll make something interesting but very light cone.I guess I'll have to weigh every component. If I hit that goal, the power to weight ratio will be fantastic 

I'm 99% sure my wr250r weighs more than that.

 Looking great btw.


Sent from my iPhone using Tapatalk

[jas67]

I'm 99% sure my wr250r weighs more than that.

Yep, #295.

[jag767]

I'm 99% sure my wr250r weighs more than that.

Yep, #295.

Thats wet, I just looked it up too lol

[jag767]

I won't weigh in til I break it apart for paint and powder, but based on what it feels like right now i'd bet I can hit 270 dry. Btw sitting on it the bike feels awesome. Has the classic cafe geometry I like, and the motor fit it so well. Ground clearance on the oil pan isn't great, but I think 4-5 inches will be ok.  I have goodies on order to really get it complete. I need to sell the ducati/honda hybrid to finish this thing 

[jas67]

Ducati/Honda hybrid?
Tell us more?

[jag767]

http://www.bikeexif.com/ducati-160

[jag767]

Uno mas

[jas67]

http://www.bikeexif.com/ducati-160

OMG, that is too cool!    Those bevel motors are the best looking motors eve made!  You don't want to part with that!
Of course, I'm partial, note the Ducati Monza 250 in my signature.

[jag767]

http://www.bikeexif.com/ducati-160

OMG, that is too cool!    Those bevel motors are the best looking motors eve made!  You don't want to part with that!
Of course, I'm partial, note the Ducati Monza 250 in my signature.

Haha thanks. Apparently motor swaps have become my thing, but if I want to finish this, it unfortunely has to be sold.

[SOHC4 Cafe Racer Fan]

Are you using the passenger peg bracket to mount rearsets or will you cut them off to mount a bracket off the bottom rear of the triangle?

[jag767]

Passanger brackets are very comfortable for me, i like having my feet back.

[02z06dave]

You can save a good amount of weight if you leave everything bare metal, no paint

[SOHC4 Cafe Racer Fan]

You can save a good amount of weight if you leave everything bare metal, no paint

But you'll be constantly spraying the frame, tank, etc. (steel parts) with WD-40 if left truly bare.

[jag767]

Yea, not willin to compromise finish. Powdercoat on all but the motor and tank

[RAFster122s]

Confirm with PowderMan...
If you get a good powder coater to do the job the powdercoat will be thin but tough.  Modern powders are better quality and thinner than they used to be.
Therefore weight gain will not be substantial.  If the parts are not properly cleaned they can still rust beneath the powder.  I have a center stand that has this problem because itwas not blasted clean at the welds or the nature of the design allowed water to get into the weld behind the powder enough to crack the powdercoat and show that lovely orange...

So, degrease the parts yourself very well as just blasting won't get them clean but often drives that grease into the metal causing contamination messing with the powder's adhesion.
Todays powders can look better far longer and many will be surprised to learn some tanks and other pieces are powder coated with metallics and clears.

[jag767]

Yea I have an excellent powder guy, real quality work and reasonable too. I'm thinking green for this guy

[jag767]

Damn near everything I need has been ordered. Still can't make up my mind on exhaust, I need to get it off the table and stare at it for a while to get idears. I'm torn on what kind of muffler to use. I'm tired of reverse cones, but I don't like the sound of the modern stuff. Cone engineering has a can style that's interesting, kinda splits the difference, so I may have to try that out.  The rearsets will get here today so I can figure out linkage. Normally I go with dime citys, but I was digging the Joker machine ones, decided to try them out. The knurling from dime city is really rough, wears a hole in the top of my shoes.

[jas67]

This is getting exciting, I can't wait to see the final result!

[RAFster122s]

Slip a rubber sleeve onto the dime city shifter.  That could help with the holes in your shoes...

Sugru is a formable rubbery plastic that sets once you knead it and shape it to the shape you wish it to be...  It might be durable enough to give you the protection you want.

[jag767]

Slip a rubber sleeve onto the dime city shifter.  That could help with the holes in your shoes...

Sugru is a formable rubbery plastic that sets once you knead it and shape it to the shape you wish it to be...  It might be durable enough to give you the protection you want.

Or what I really need is my own lathe so I can make my own pegs lol. I miss having access to one. Here's the Joker machine rearsets, I highly recommend them, imo they are excellent and worth $200. My only complaint is the mounting bolt is too short, but easy fix. I'm going to weld the mounting hole shut and then thread it.

[jag767]

Some kinks to work out

[joeyvans]

Love the look....  Yes, clearance is an issue, but all of those Harley bagger guys scrape the ground.... why can't you??!! 


Sent from my iPhone using Tapatalk