Yamaha SR 250 "The Maniac"
1st – Marco Troiano
Marco looked at the 1982 Yamaha Sr250 and rolled up his sleeves.
He started modifying thoroughly, shortening it and using a unique rear suspension scheme, with a single shock working in reverse, when in traction instead of in compression.
The rear 16” tyre is beautifully and really unusual, being nothing less than a tractor’s front wheel. Genial.
And the tank is straight from a 70’s 50cc motorcycle but Marco doesn’t even remember where he got it from, the fairing and fairing’s frame are homemade.
LOVE this bike!
ReplyDeleteI'm not crazy for bikes like this, nor am I crazy for cast mag wheels - but I can really dig the front wheel here, which seems like a drum to disc conversion? Stuff like that could lend itself well to fitting 16" mags front and rear, 18" mags where they're otherwise unavailable - Albeit the cast mags with a drum front brake are gonna be skinny compared to a similar disc braked model, given that they come off of smaller models - they're still as cool as all get out. Only a handful of bikes which I can think of off-hand, which used a front drum brake in a heavy as shit boat-anchor wagon wheel. It's kinda limiting in that you can't upgrade the drum as you would with a wire wheel - and upgrade the rim while you're at it - but where and when stuff like this CAN be used, and the weight isn't so much of a factor, well WTF it looks really cool! I wonder whether there were ever any versions of which, cast in actual Magnesium. Perhaps on some race-spec MZ or other such European models..... Well either way - a wee bit of machine work on a regular old drum-braked REAR mag wheel, and you could get the same effect. With the extra width of a standard rear rim of the bigger model that might come off of. 16" would be especially weird. I'm doing the same thing on my "KZ440LOL" but with wire-spoke wheels and the Suzuki 4LS drum - but a far cheaper version could be rendered from any random 16" mag wheels - And there are all of these Maxi-Scooter tires out there in appropriate speed and load ratings. I looked at it as a way of sticking some fatter rubber on the bike but without increasing the rolling inertia. Well, the bike's for my kid and she said she wanted another scooter, so I guess it was her idea in a sense.... But yeah the 7-spoke mag rear 2.50x16" rim off the KZ itself might work well on some sort of 125-250cc light-weight bike. All the more interesting if the cush-drive could be replaced with another drum on that side, just a bolt-up job of some sort like an old Vincent or Harley would have circa 1930s-'40s etc. But a disc would be neato too, so long as you get that huge blob of a center hub in the middle of all those Iron girder spokes. OR wtf it could even go with dual-disc brakes and still bring a goofy odd-ball look to the bike, if it's still a fat 16" rear "chopperette" wheel.
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