BUMP! BUMP & A HUMP! Humpity-hump-hump-hump, which from your side of the motel-room wall should sound like "Bumpity-bump-bump-bump"!
I'm hoping to find somebody who'll build a custom cush-drive & rotor-spacer for me. JUST like that - but different.
(((Had problems with my local machinist messing up the Suzuki 4LS hub on my daughter's "KZ440LOL" which stalled the project outright while searching for a replacement shoe-plate on the speedo side - asked for a new nut for the axle, to put the hex on the outside rather than inside of the fork leg of the 39mm CB900F fork ... should've waited for a 37mm or even 35mm specimen of the same thing, as the KZ's fork is 33mm to start with, but it's what I had on hand - long story short, he made a huge fugly imperial measurement nut which wouldn't look out of place on his Terminator-II replica Harley ... ugh .... and cut more material off to fit the new nut than would've been cut off to accomodate the original nut!!! Gave him a pile of stuff to work on, offered to pre-pay a an ample sum, and asked him to wait & speak more as I was going on a trip - heard from him two days later, eager to get paid ... and he'd screwed up every single item which I had laid out, literally did 'em all in exactly the ways which I'd spelled out six ways to Sunday that I'd wanted to AVOID - He'd done good drum skimming for me in the past, for cheap too - But even though he's offered to fix stuff, most of it would require new parts to start with, and I just don't trust that he'd do it right - Paid through the nose to get my damaged parts back, too - Just sayin' - don't anybody lament how much they've spent on stuff that WORKS!)))
*cough*
So I've got 40-spoke original vintage rims ("Super-Akront" 3.50x18" etc, several rims drilled for the Harley pattern, ergo a front sized Japanese 40-spoke hub) so I'm keen to use a 40-spoke hub, obviously - HONDA front hubs, ideally - it's a Honda that I'm working with, though we're really only talking about a stock frame & engine when you get down to the nuts & bolts of what I've done thus far even, stock wheel hubs & rotors would retain a stock look despite the wire-spoke wheel-swap! The '75-'76 CB750F1 SOHC-4 hub is a straight swap which uses the same spacers, and indeed one of the 4.25x18" Akront rims I've got for this build, is drilled for the stock Honda rear hub - But I've got another such rim, identical other than being drilled for the Harley rear hub. I'm thinking this could be, MIGHT be, an opportunity to shave off some rear hub weight, to improve the un-sprung mass & rear suspension compliance etc.
(((((What with the number of people looking to do lightweight disc conversions on CB750's, paired to the Harley-pattern drilled rims which are cheap & ubiquitous - including Super-Moto rims I got in 4.25x17" & 5.00x17" 40-spoke Harley pattern for $39.99ea, but the seller's got 'em for around $150ea now 'cause I opened my big yap & told him to list 'em for Japanese bikes too rather than betting on a Harley market which really doesn't exist - he said he inherited "a warehouse full of 'em" from a failed business and had no idea what to do with 'em - should've bought more while they were cheap....) *COUGH* AND other Japanese bikes which would require more or less the same damn thing with subtle differences? ..... SOMEBODY ought to be selling an Omar's style "FRONT HUB TRICK KIT" for every last model of Japanese Superbike that's left out there to work on! And yeah, that would even include some of the CAST wheel bikes come to think of it - Wire-Spokes for Crotch-Rockets on the one hand, OR possibly something to do with using 3.50x17" front 3-spoke wheels on say ... shaft-drive bikes with skinnier 17" rear wheels, OR smaller models of Crotch-Rockets which had 2.50x16" etc rims - what HAVE you, I'm thinking there should be a business offering a basic kit that they could drill & off-set to work with ANYTHING, really - But at the very least, a version for each of the "Big Four" flagship '70s Superbikes! The narrow XS650 front hub could be quite amenable to say, throwing a SHAFT adapter on the thing, and running it on an XS850 or some such?)))))
Incidentally, I'm ALSO interested in a bolt-up cush-drive "Front-Hub-Trick" for the 5-bolt COMSTAR front wheel, to be rebuilt with the 50% lighter & wider Akront "NERVI" rims (which are VERY hard to find, but they're out there - Check out the rebuilt Akront COMSTAR wheels in 3.0x18" & 6.0x18" on the "Van-Geert CBX" sometime - maybe even read my ranting about how simple it would've been to make that thing ten times better via spoke hub & rotor choices
AND I'm also very interested in a "WELD-UP HUB" wire-spoke conversion for a GL1100 rear hub, just like the wire-spoke conversion on the shaft-drive CB900C-based CHOPPER by one "6pkrunner" on the CB750C.com forums!
AND I'm after either a '77 Canadian/Filipino spec CB750P7 POLICE front hub, which is a wire-spoke 40-hole version of the COMSTAR hub, or could also be thought of as a dual-disc version of the '79-'82 CB750K DOHC-4 single-disc FIVE-bolt rotor-mounting front hubs, or in simpler terms a 5-bolt rotor mounting version of the standard 6-hole Honda SOHC-4 CB750K/CB750F1/CB500/CB550/CB500T/CB450 etc etc & GL1000 Gold-Wing front hubs - There are several fantastic 5-bolt rotors most of which can't just simply be re-drilled, especially the one-piece dished '81-only CB1100RB 296mm front discs, which are basically an embiggened version of the 276mm 5-spoke/10-spoke one-piece rotors from '77-'78 CB750F2 or '78-'80 GL1000, etc etc. They weigh even less than half that of the standard SOHC-4 '69-'78 CB750K0-'K8 9-rivet composite front rotors - which you can ALSO get in a 5-bolt mounting anyhow, from the single front disc off the Comstar-equipped '77-'78 CB750A Hondamatic! SEVERAL very cool front rotors in the 296mm size plus bigger diameter 9-rivet carriers in 276mm discs from CB1100F "Boomerang" front wheels, & versions of GL1100 / GL1200 for pennies on the dollar - which might be rebuilt to an even larger diameter yet seem very much period-correct AND proportional? I'm thinking a 43mm TRAC anti-dive fork from '96+ ST1100-ABS Pan European which came with 316mm discs, looks just like a 39mm GL1100 fork but could be made into a pseudo-replica of the NS500/NSR500/RS500 front end with the big orange "SHOWA" stickers on the legs - you can even get the stickers from the dirt-bike restoration nuts, too......
So YEAH - the "WELD-UP" hub on the rear, is basically a shaft hub spooled down on a lathe, plugged into a drum hub that's been hollowed out side-to-side, and fillet welded - with drilled holes & pins to keep the "chain-line" off-set correct for stock spoke sets etc, but it needn't be TOO concentric 'cause that's what the wire SPOKES are for!
Meanwhile the FRONT version of which, is simply a pair of spoke flanges, possibly cut from plate but the original hubs would've been a similar casting alloy & so would likely weld to one-another a lot better than the new billet/plate material. I suppose a copy of this hub might ALSO be milled from billet, or modified from a Harley aftermarket front hub which is also a 5-bolt type. But the thing about the original CB750P7 wire hub, some rare Unobtainium if ever there WAS such a thing - Just how many bikes DID the Philippines Police forces and Canadian RCMP ever BUY in the first place??? - While stipulating the Comstar wheels be swapped out to the original wire-spoke style of the CB750P Sand-Cast style Police bikes - (((And yet which used the brakes from the '77-'78 CB750F2 Super-Sport, yet on a FORK which seems to be neither a CB750F2 item nor a '75-77 GL1000 nor '78-'80 GL1000 nor '78-'79 CBX or any OTHER type of Honda fork from the period, but rather some sort of hybrid or portmanteau of ALL of these different versions - Which leaves me wondering whether the other CB750P7's from '77-'78 with the COMSTAR wheels, used the same fork???)))
-Sigh.