road bike project scratch built

[sidecar bob]

rear suspension is a copy of the xr69 Suzuki. The bimota had quit a small box section for it's swing arm and no triangulation and its very long. from memory in the day some thought that was a problem.
I always loved the bimotas and had a magazine I kept for years with the KB2 which I thought was the most beautiful piece of engineering.

Regards Ian in the world

Twin shock or mono XR69?

[Grumph]

Hi Guys . I am going to build a steel triangulated swing arm But the problem I have is I can't get the rectangular erw I want . I can get 51x32 x2 Which may look a but small or 62 x35x2 ( I have a short piece of ) but it looks a bit chunky, It would probably be ok if it wasn't triangulated The size I really want is 57x35 but they don't make it any more. Looking at photos of 80s kit bikes I would probably lean towards the 51x35. Also not sure weather to use round or box for the triangulation.
Got the motor out but had to cut one front down tube as expected

Regards Ian

Only my opinion - but I think you're going too big if you're triangulating it as well. I'd use 2X1 - ie 52X25 - and 1.8mm wall too. I've made a few arms from this and they finish up very stiff. Foale somewhere goes through the calculations - lateral vs vertical loads - and finished up with 2X1 16G...
Any wider section horizontally and you're starting to get tight for room at the pivot end - particularly if you're using a wide tyre.
I'd use round for the triangulation - it bends easier.
Alloy blocks in the ends of course for axle location. You'll be surprised how stiff it finishes up.
2X1 is pretty common. I've got probably half a stick left here.

[husaberg]

Anyone for cutting up a fireblade frame

[Ian Staples]

mono shock xr69. all of the shock and lever set up is already in the frame
Regards Ian

[husaberg]

mono shock xr69. all of the shock and lever set up is already in the frame
Regards Ian

If thats the case Ian surely seeing as you used modern forks and wheels why not just use the Srad swingarm as its a beefier version of a similar look? or Triarm? or FZR/YZF
Or is it just about building it yourself as you clearly have the fab skills?

[Ian Staples]

it's the build . using an existing swing arm is to easy

Regards Ian

[sidecar bob]

it's the build . using an existing swing arm is to easy

Regards Ian

I thought that may be the case.
If you were doing header wrap & a brown seat on a gn250 for your "custom build" you would be finished & riding it by now.

[F5 Dave]

Er, no it would be on trademe by now.

[jellywrestler]

the rear number plate needs to be within 15 degrees of vertical is something else that needs to be consideredm too

[Ian Staples]

I had a bit of a win on ebay. I found a 1100f clutch cover in france for 30 euro but they wanted 202 euro shipping . I asked them to look at postage and they come back with 25 euro so for a total of $97 nzd I have the clutch lever problem solved !!

Regards Ian

[sidecar bob]

Hey Ian could you put up a few detail pics of your sidecar on here please, with back story's on how you created various bits & pieces.
I read your build in NZSRA newsletter, I think members on here would find it very interesting.
Thanks, Steve.

[jellywrestler]

had a good chat with an LVV m/c certifier today, he only does half of it, he does the structural certifying then it goes to the people who vin it to check the placement of shit. interestingly if it fails, you have 21 days to get it back otherwise it's start again and pay full price, that will be a pain especially if there's no-one locally.......

[jellywrestler]

I had a bit of a win on ebay. I found a 1100f clutch cover in france for 30 euro but they wanted 202 euro shipping . I asked them to look at postage and they come back with 25 euro so for a total of $97 nzd I have the clutch lever problem solved !!

Regards Ian

you shop is the answer often there's one in england europe and the states

[HenryDorsetCase]

you're forgetting one thing, honda doesn't yet make sports bikes.

Mr Honda's son who owns Mugen begs to differ....

[Ian Staples]

Hi all. I haven't done much on the bike lately except fully weld the frame . my plan is to try to build a alloy tank and seat so I have just built a shrinker /stretcher and planishing hammer
regards Ian