Team GPR

[Grumph]

He certainly does have a great track record the worlds fastest CB72/77 with 500cc and 6 speed gearboxs.

Yeah, he's helped my customer with some cam probs on his macchis - but he couldn't put a 350 dry clutch 5 speed box into a wet clutch 250. I could and did for the guy. Still together too, lol....

[husaberg]

Yeah, he's helped my customer with some cam probs on his macchis - but he couldn't put a 350 dry clutch 5 speed box into a wet clutch 250. I could and did for the guy. Still together too, lol....

I can't remember what his company did? but I think it was engineering for the mining industry.
it looks like he has done a CB72 based 500 4 as well. With DOHC



For Scott here is a lot of information and pictures of all the models and their names
http://www.vf750fd.com/Joep_Kortekaas/1967.html

[mr bucketracer]

This is the best detail shot I have, from Classic Japanese Racing Motorcycles by Mick Walker.

I doubt the CB350/400 SOHC motors have as std enough of a lug on the cam cover to do it properly - and they don't lean forward enough either.
I realise you're looking at Register use but down here I could do a frame which looks period - and as long as the right bits hung off it, forks, shocks, wheels etc it would be acceptable.
i do know of a guy in South Australia who's building a copy of the real thing. He's a mate of an Aermacchi customer in Adelaide. He's got a track record of doing amazing things with Hondas so it will get built. Remembered the name - Jerry Koistra
I'll try and attatch a pic of the 350/455 one I've almost finished...

cool ,plan on making a 4 valve heads , how far to a 500 can you take them if i went that way?

[Grumph]

cool ,plan on making a 4 valve head

Fair enough, you'll save effort if you use valves, cams etc from a CBR250 of course. Cast up a finned copy of the watercooled layout with stud spacings to suit the CB350 cases.
Looking at the cases, you could always cut and shut/weld the top face to lean the barrels forward. They're not sophisticated at all - and you could do a better/simpler cam chain tensioner too....

This one is 455 cos there are a lot of period o/s cast pistons appearing on ebay. Bigger than that, I'd look hard at the rods...and the liners (400 barrel....) are getting thin too. YowLing machined the cases for the bigger barrel.

More edit - if you really want a 500, start with a 500. There are more gearbox options available. The 400 6 speed don't go in the 350 cases...

[mr bucketracer]

Fair enough, you'll save effort if you use valves, cams etc from a CBR250 of course. Cast up a finned copy of the watercooled layout with stud spacings to suit the CB350 cases.
Looking at the cases, you could always cut and shut/weld the top face to lean the barrels forward. They're not sophisticated at all - and you could do a better/simpler cam chain tensioner too....

cool , prombley do in stages

[husaberg]

cool , prombley do in stages

why stop at 4 cylinders
http://thekneeslider.com/jlsp305-300...-luc-borgetto/




http://thekneeslider.com/300cc-inlin...sonal-project/

[mr bucketracer]

just got these pictures sent to me , 2006 last pn kart track meet if my mined serves me right ,fish at meet ,wet met , on the the first ever fxr 150 months from new rules

[mr bucketracer]

why stop at 4 cylinders
http://thekneeslider.com/jlsp305-300...-luc-borgetto/




http://thekneeslider.com/300cc-inlin...sonal-project/

got to love the sound

[mr bucketracer]

my new book

[chrisc]

Of course it is mate. Those things have cast iron cylinder heads with match and candle ignitions

[TALLIS]

my new book

That's my car in that book

[mr bucketracer]

Of course it is mate. Those things have cast iron cylinder heads with match and candle ignitions

shot gun shell ignition (-; lol

[mr bucketracer]

That's my car in that book

i should of left that out lol

[Grumph]

Just got around to looking at the jerry Koistra pics husa posted. tyrewarmers for pre 63 ? Hmmm.
But I do like the hot air guns to prewarm the motors. If i ever do greymouth again, i'll remember that. Probably have them stuffed up the riders leathers though...
The four is obviously Jerry's 350 rep finished. last pic i saw was about 18months ago, part done.

[husaberg]

A few more ideas
Drixton



Lyster


One off the Eurospares page of Mike Moore (this might be Drixton also)


Colin Seeley


Rickman


A replica made for the CBR250 engine

http://www.jl-exhausts.com/honda-rc1...its-1037-p.asp

Honda ID guide
https://s-media-cache-ak0.pinimg.com...dd0f605601.jpg

Something a little different a replica based on the RCB racers of the latter 70's
http://i.imgur.com/GlYFn.jpg

nice side on pic rc174
http://dropbears.com/gallery/honda/i..._RC174_HnH.jpg