xbr/rs

[Propellor]

The Ikuzawa used the engine as a stressed member with no lower frame rails

So did Tigcraft, Hagon, Spondon and many others

With the engine removed, the standard RS frame would be as stiff as these others?

[Propellor]

......There's about 20kgs diference between them - 136kg for the RS against 157kg for the XBR. Some of that will be the 2nd silencer on the XBR and oil tank & plumbing so not that much really.  I suppose part of it was that the RS was around when we still had the 250cc learner laws so may be it was made on the slim side so that once you passed your test and got the 500 it felt like a 'big bike'.

Very true. It was also out at time when the two stroke ruled in terms of power to weight. So maybe Honda did everything they could to reduce weight on a budget.

20 kg difference is a lot. If I ended up adding 10kg to the RS standard weight I'd be pretty happy I think.

[Propellor]

Had an opportunity to spend an hour on looking at the fit of the injun.

Removed the top rear engine mount bolt. Kept the bottom rear engine bolt in place. Pivoted the engine forwards until the cylinder fins were about 10mm off the down tube. The angle of the cylinder is not quite the same as in the xbr frame, but almost. This looks very reasonable as a solution. It means the top rear mount plate needs re fashioning.

The bonus is that the top mount lug on the head now misses the frame by a mile.

Made a few cardboard templates for some ideas I have for strengthening the frame.

Feeling good about it. Will be a long haul, but hopefully will yield something radically different.

Ps. Note to self. Remember to allow for an oil tank!

[guest564]

The Ikuzawa used the engine as a stressed member with no lower frame rails

So did Tigcraft, Hagon, Spondon and many others

With the engine removed, the standard RS frame would be as stiff as these others?

Difficult to say, they are very different designs but with the engine in they will all be much stiffer.

My engine was tilted slightly further forward without any issues, if you tilt it too far then you may have problems with insufficient oil in the 'buckets' for the cam.

[Propellor]

If anyone could explain how one gets photos direct from i pad onto here I could show progress.

Cheers chaps.

[Moto63]

Here here, it wud certainly make life easier for the techno logically challenged among us (me in other words)  cheers

[Moto63]

Ps. Trust me when I say you,ll want to see the photo,s of the mock up. It,ll be an "interesting" looking bike when it,s done

[Propellor]

What to do with the buckshee rs motor?

Thinking of making a full ally frame. Mono shock.

Thinking of selling beemer to fund it.

[SteveC#222]

What to do with the buckshee rs motor?

Thinking of making a full ally frame. Mono shock.

Thinking of selling beemer to fund it.

You want to look at some of the alloy beam framed 125 race reps, - the Cagiva Mito 125 was popular for fitting an SRX600 engine in - great frame and brakes, light weight with a big thumpy engine!. You might be able to pick up a rough blown motor example fairly cheap.

[Propellor]

What to do with the buckshee rs motor?

Thinking of making a full ally frame. Mono shock.

Thinking of selling beemer to fund it.

You want to look at some of the alloy beam framed 125 race reps, - the Cagiva Mito 125 was popular for fitting an SRX600 engine in - great frame and brakes, light weight with a big thumpy engine!. You might be able to pick up a rough blown motor example fairly cheap.

Cheers Steve. I'll check that out. Even if I go with making the frame I'm still looking for running gear from something light.

[SteveC#222]

How about this Prop!



XBR engine in RGV rolling chassis!! Nice!!

[Moto63]

Yes tis indeedy Steve, not so sure about the very 90's colour scheme tho. What were people on back then??   Oh yeah aceeed was,nt it. Thanks for posting it tho, shows what ya can do with a bit of imagination eh. Take note PROP.   

[Propellor]

It's the business ain't it. Lovely thing.

My own personal style is less plastic, in fact no plastic! But the idea of an xbr injun in a ally frame and decent running gear really appeals. Thanks for posting that .

[guest564]

that is nice. It reminds me of a Spondon chassised XBR that I guy called Brett Randel used to race in the early 90s - he swore that it wasn't actually pink.

[Moto63]

Wow a spondon framed XBR, now that I would love to see. I was lucky enough to be in the right place at the right time last year when graham was selling his Harris framed ikuzawa which in itself is a thing of beauty but I,ve always had this thing about spondon and then later the martek frames. Just love em. Crying shame both companies no longer trade. (As far as I,m aware) don't suppose you have any photos of the spondon??  Cheers Michael