Topic: WHOA! Never Saw A 350 Jawa That Looked Like This! A FOUR Cylinder?

[SoyBoySigh]

BUMP

[SoyBoySigh]

And I'll make ANOTHER suggestion, if I may. Or two or three more suggestions that is.

http://www.caferacer.net/forum/attachments/general/6334d1396647573-inboard-inboard-disc-comstar-hubs.png

The MXV250F V-3 - (Which surely must have been INSPIRED by Bill Ivy's JAWA 350cc V-four, dontcha think?) itself had only the SINGLE-disc version of this hub - which might just make for one very interesting 2LS style conversion hub, complete with a ring of big holes spinning round & round - But yeah it might just make sense to dig up the double sided version from VF400F or CBX400F, CBX550F etc.

Myself, I'd prefer to KEEP the 16/18 rim set, and I've got some great 3.00x16" rims left over from the "KZ440LOL" (as in "Laugh Out Loud" - check out my Avatar for a pic of the Suzuki 4LS drum laced into this size of rim) which I'm building for my teenaged Ex-Daughter alongside of my "CB900K0 Bol Bomber" - as well as some 3.50x16" "Super-Akront" brand and regular old boring flat "Akront" spares from the Bol Bomber itself - spares which are "drum-drilled" and so would be highly appropriate for just such a front hub.

OR, there are some 2.15x16" & 2.50x16" 36-spoke drum-drilled rims available super-cheap from "MIKE'S XS" the XS650 specialist - the XS650 rear drum is practically a front 200mm 2LS drum in it's own right, not having any cush-drive at all - Either way, for the KZ440LOL front hub the rim I sourced which finally FIT (being that Borrani only brought back their new manufactured 3.00x16" & 3.00x18" rims via Motocicli Veloci Milano, [perhaps in response to my many pleading e-mails???] only AFTER I'd bought something like 6 or 7 of these rims!!!) was off of an XS650 rear drum which somebody had seen fit to use a decent width rear rim, so as not to pinch the tire. And of course, the new Maxi-Scooter rubber which is available now, which itself inspired the "KZ440LOL" - comes in appropriate widths and load-bearing indexes which are far far more appropriate for these smaller lighter bikes than the older style 16" tires!

See, the OEM MT90 130/90-16 rear tire from the KZ440LTD's 2.50x16" rear rim - is not only recommended for a 3.00" rim minimum, ideally for a 3.50x16" and typically used on cheaper crustier heavier chromed-steel FIRESTONE rims on Harley rear wheels - It's got a load-bearing index for a huge heavy Harley as well. And for a higher speed rating IIRC - Either way, the weight difference itself does the same thing as the speed rating, in that the tire carcass never heats up to temp and furthermore the pressure on that tire never allows it to deflect into a proper CONTACT PATCH - this is bad for traction in the worst way!

But then you look at the 16" stuff for the Maxi-Scooters and we're talking about a range from 70/70-16 through 120/70-16 for front wheels, and 90/70-16 through 160/60-16 for the rear wheels. A HUGE range. Sizes appropriate for my originally chosen rims in 3.00x16" & 3.50x16" are 110/70-16 & 140/70-16 furthermore at that time there was a dual-compound rear radial basically a scaled-down Michelin Pilot-Power. I gather they've still got 'em in 15" sizes but we're really not looking at the 16" let alone 15" rear rubber we're talking about FRONT tires. I'm talking about a nice Bias-Ply suitable for the weight & speed and rim width etc, where you could pair rims up like 2.15x16" with 2.50x18" or 2.50x16" with 3.00x18" or 3.50x18" and both tires could be appropriately matched to one another and the bike itself.

Ah but that's not all!!!

[SoyBoySigh]

Here's another Czechoslovakian Grand-Prix racer from later on in the '60s, one which is said to have been the most promising contender to beat BOTH Agostini on his MV Agusta DOHC-4 and DOHC-3 500cc racers, AND Mike Hailwood on the '66-'67 RC-181 500cc DOHC-4, if only this thing had been given practically ANY factory support at all let alone sponsorship of any sort from a Western company or even some type of Eastern-European export product - Hungarian Paprika perhaps, or some of those old's-cool Rosehip soups or tinned black-currant jams etc. There were several wonderful products which only came out of Eastern Bloc countries back in the '70s & '80s and if you don't believe that then you need to take a much much closer look at this BIKE - a story much like the East German "TRABANT" automobile only it's supporters were even smaller in number, basically everybody involved on the whole project would've barely made up the damn pit team itself ha-ha. Truly truly sad stuff.

DAMN what a bike though. A solid cast crank, much like SOHC/DOHC Honda only it still had a roller-bearing crank. HOW??? Split-ring bearings. Can't find a pic of 'em but they were gorgeous structures, the split being cut with several tooth-grooves so that the break point is a zig-zag across from side-to-side hence the roller-bearings are supported by something no matter where you look. Didn't even realize you could DO that type of stuff.

Now of course, this thing's an air-cooled motor. Which is different than what I was gonna suggest. But then again, most of the Jawa V-4 350's I've seen pics of were the air-cooled version. Wasn't even sure of the liquid-cooled thing, when I first saw the above pics I thought it might be something like an RG500 etc. But yeah, the air-cooled vs liquid-cooled thing shouldn't matter if everything else is close enough.....

[SoyBoySigh]

Twin-shock is VF1100C V65 Magna, of course.

[SoyBoySigh]

pro-link or mono-shock is of course the V65 SABRE

One might be able to find a V45 750cc version easier & cheaper. but don't you want to be able to call it a "CZ860 Sand-Cast" and not feel like you're exaggerating about the displacement?

More to the point, there's actually some RC Engineering (Russ Collins) STROKER CRANKS for these bikes, and IIRC the 750cc version might actually have BEEN something like 860cc's, while the V65 stroker pulls the stump at 1230cc's WOW. Awesome if it actually was 860cc's though, I mean - must've been the idea all along ha-ha. Or a Freudian thing, unconscious "slip"?