Posts by tag: Two Stroke

Kawasaki December 11, 2018 posted by

P.C. (Preposterously Clean) – 1973 Kawasaki H1 500 Mach III

It would have been almost impossible to find an H1 in this condition in the mid-1970's, Mach III's generally obscured by dirt accumulated in the oily mist coating the bike.  This one has had a nice restoration and the auction still has a couple of days to run.

1973 Kawasaki H1 500 Mach III for sale on eBay

Back in the day, the only way to approach 100 hp per liter was with a two stroke, and while Honda had moved on, Suzuki still had a competing 500.  The basically square cylinders ( 60 x 58.8 mm ) resulted in 60 hp at 7,500 rpm.  The chassis was unfortunately not up to the task, put in a lot of over-exuberant situations.  Brakes were the usual, that is to say wholly inadequate, but this owner has added a second front disk.

A sparkling restoration and though the owner doesn't divulge who did the work, the carefully detailed engine and wheels look great.  From the eBay auction:

The following services have been performed:
* Rebuilt Crankshaft, bearings, seals and gaskets 
* Pistons & rings (.50 over)
* Rebuilt Carburetors rejetted w/pods
* Fork tubes, seals & dust boots
* Stock rear shocks
* Triple tree bearings
* Controls, grips and mirrors
* Super bike bars
* New cables
* New signals & stems
* Polished: Engine covers, outer head fins, forks, rear hub
* Rebuilt calipers - Dual brake system with refinished rotors
* 5/8 master cylinder
* Stock brake lines
* original grab rail, brake pedal, shifter, front fender
* re-chromed fork ears, chain guard
* New Paint, decals
* Re-laced rims
* New tires & tubes
* Chain & sprockets 
* replacement clutch
* Original seat 
* Bill Wirges chambers

Reviews raved about the big triple, while things like mileage and changing spark plugs every other oil change were easily forgotten.  But no one's proposing the H1 as a daily rider in this day and age, especially looking like this.  Wish the owner had attached a video with the sound of those triple expansion chambers...

-donn

P.C. (Preposterously Clean) – 1973 Kawasaki H1 500 Mach III
Yamaha December 9, 2018 posted by

Muscular Monkey Bike: 1989 Yamaha YSR-50

This 1989 Yamaha YSR-50 isn't anywhere close to perfect, but it is a nice, functional example of what was a very popular -- if slightly weird -- part of Yamaha's past. They might be tiny, but modifications abound for the 7 horsepower, 50cc two-stroke single, which will raise the top speed above the original 38 mph. Lots of up-and-coming road racers in the late 1980s and early 1990s turned their first laps on YSRs, and you'll still see them being thrashed in series like M1GP.

1989 Yamaha YSR-50 for sale on eBay

The seller's description is scant on details, but it has its share of niggles, including blinkers that come on but do not blink. Many of the metal parts have age blemishes on them, but appear to be sound. The right side fairing has some rash, so somewhere over the bike's 1,800 miles it has at least been dropped, if not actually crashed. The bike will require some work to be a museum piece, to be sure, but as these little rippers get rarer, their popularity is going up.

From the eBay listing:

Yamaha ysr 50 very nice ,not mint .but very nice rider 1,807 miles new battery runs very well every thing work .but the blinkers don’t blink..titled in my name ,all stock Oem bike view pictures

We have seen nicer versions of the YSR sell for double the opening bid on this auction, though there has been little activity on this auction thus far. If you're looking for an entry-level racer, a funky rider or an easy project, this thing could fit the bill.

Muscular Monkey Bike: 1989 Yamaha YSR-50
Yamaha December 5, 2018 posted by

Museum Quality: 1991 Yamaha TZR250 SP for Sale

Let's get this out of the way up front: the seller is asking $16,000 for this bike, and that's a big number for a Yamaha TZR250. But obviously, a thing is worth what someone will pay for it, and I'm not sure that the seller won't get what they're asking here, since prices have been increasing steadily on all two-strokes for the past few years. If you're a collector for whom a couple grand one way or the other really doesn't matter, and want the very best example for your collection, this TZR250 SP might just be what you're looking for. Sure, $16k is a lot to pay right now for a TZR, but that might seem like a bargain in just a few years.

There are three generations of Yamaha's two-stroke sportbike: the early parallel-twin 1KT/2MA, the reverse-cylinder 3MA, and the v-twin 3XV seen here. Personally, I love the style and general weirdness of the 3MA, especially that version of the gorgeous Deltabox frame, but the 3XV seems to be the most highly sought-after version of the bunch. There were a variety of different specification levels for the 3XV version, designated by the usual alpha-numeric gibberish: R, RS, RSP, SP, SPR. Wet and dry clutches were available, ignition and powervalves had different performance characteristics, and fairings were not always interchangeable between models. Ferreting out detail differences in these Japanese market bikes can be tricky, so experts are welcome to chime in in the comments.

The seller claims you can get 90hp from an unrestricted example which, from what I know, is theoretically possible, but at the expense of any pretense of durability. That's pretty much race-spec, a smoky grenade you should ride with your left hand covering the clutch. Somewhere in the neighborhood of 60hp is more reasonable for a highly-tuned streetbike, and doesn't really change the seller's point at all, that an unrestricted bike would be much more powerful.

From the original eBay listing: 1991 Yamaha TZR250 SP for Sale

This bike is fantastic. It has 1800km (1100 miles) it is a Japanese Domestic bike which I imported personally. There is no bond or restriction from Customs you can get it on the road virtually anywhere if you wanted to street ride it.  As you prolly know the SP bikes were about halfway between a standard TZR and a customer-racing 250. Restricted it's 50hp and less than 300 lbs. It's a weapon - even after 28yrs!! I have been told that derestricted with basic mods you can get 90HP from these which is just insane, of course. Thanks for looking!  

From the photos and description, this thing is just about perfect, in very original condition. And that's maybe the only issue here: in stock, restricted form, the whole gang of quarter-liter two-strokes made a government-mandated 45hp. But it really depends on what you're looking for: a wicked weekend ripper or a perfectly preserved museum piece. And I get the feeling that a dead-stock example is the way to gamble if you're looking at investment potential.

-tad

Museum Quality: 1991 Yamaha TZR250 SP for Sale
Yamaha November 30, 2018 posted by

Buzz Buzz Buzz: 1984 Yamaha RZ 350

The last street-legal production two stroke sport bike officially imported into all 50 States of the US by a major manufacturer, the RZ350 holds a special place in the heart of motorcycle enthusiasts. It was Yamaha's valiant move to bravely keep the two stroke spirit alive and kicking in the face of tightening emission and noise regulations. It was both a brilliant success and an ultimate failure; a short lived lifespan that stirred hearts as technology passed it by. Enthusiasts who reside outside of the US may wonder at the American fascination with this bike - after all it had been in-market outside of the US for years and would certainly not be considered rare. But unlike grey market imports, this was one model that we could truly call our own. And with bold Yamaha bumble bee graphics and American superstar Kenny Roberts signing the fairing of every one, this one was ours. The RZ350, for all its shortcomings, is a legend.

1984 Yamaha RZ 350 for sale on eBay

If you look at the bloodline, you can see the DNA that evokes the Yamaha RD models that came before. But designed as a modern approach to the "less is more" philosophy, the RZ added liquid cooling to the familiar parallel twin. The two-stroke powerband was (partially) tamed by the introduction of computer controlled power valves, varying the exhaust port height depending upon RPM and throttle settings. Oil injection was standard, eliminating messy mix ratio cups and associated refueling hassles. And there was a secret weapon: hidden in the smart looking exhaust pipes were a complex set of catalytic converters, just like you would find on your car. With the cats (and some air injection), the RZ could sneak into all 50 States of the Union, including the super-picky EPA stronghold of California. Sure, the cans were heavy, they were expensive to replace (i.e. crash damage) and they did not perform nearly as well as expansion chambers and stingers, but they made the bike possible in the US. They were also easily replaced, which is what most everybody did. Immediately.

The RZ350 was intended to compete with the current crop of middleweights; likes of the Kawasaki GPz550, the Suzuki GS550, or even Yamaha's own Seca 550 and FJ600. In that space, the stock RZ was outgunned by the bigger four cylinder four strokes. But the little RZ had agility on its side, and once on the pipe could fare well. But it would never be a great all-'rounder, given the peaky nature of popcorn power. There were many aftermarket and tuner tricks to unleash the beast. Typical tricks of overbores, decking the head to increase compression, and porting were effective. The fact that the Banshee, a Yamaha ATV, utilized the same motor definitely helped with parts availability and knowledge base. But despite the potential, the little RZ was not to be long lived. After a scant two years (and only one in CA), the RZ was pulled from the dealer floors. The party was over, and the used party began. This is where we pick up the story on this bike.

From the seller:
Bought this bike in 2001. Have ridden this bike regularly for 17yrs. Always kept inside. Rebuilt engine because of mileage. I am over 60 yrs old AMI certified motorcycle mechanic for 41yrs. and ride like a grandpa and take care of my things the same way.

- Work Performance rear shock
- Engine Rebuilt 1500 miles ago
- .020 Pro-X pistons,windows cut to match intake
- TDR reeds
- stage 1 porting
- Toomey pipes
- stage 1 dyno jet kit w/2into 1 K&N air filter
- Wiseco Hot Rods crankshaft
- New clutch w/springs
- Full gasket and seal kit
- Race Tech front fork springs
- Chain and sprockets 1500 miles
- New seat cover and battery
- HID headlight
- Powder coated frame
- Bike Dynos out at 59.6 RWH on Dayton Dyno at my shop!
- Spec II Full race fairing
- Fuel tank has no rust, has small quarter size dent and touch up on right front side

Forty Thousand Miles. Let that sink in. Most RZs don't get to that point, having been thrashed, abused, modified, seized and crashed. This particular bike has an amazing number of miles, but looks great. It is clearly no museum collector given the mods, but from a period correct standpoint - hell, from a fun to ride standpoint - this one piqued my interest. The .20 overbore either means the engine had been refreshed once before, or perhaps it was necessary to go that deep due to scratches in the bore. Regardless, that means for bigger pistons and more power. The K&N filter and Toomey pipes are perfect add ons, as is the full Spec II fairing. This bike has been stripped and rebuilt, as evidenced by the powder coated frame. But that just means you are potentially getting a nearly new bike out of the deal.

If you can get past the mileage (40k!) and the non-standard mods, what you are looking at is a great rider. This is a bike that deserves action rather than parking in a museum - although I must admit it looks pretty good. And with a long term owner and a capable wrench (just an assumption, but how many owners out there have their own dyno??), this bike could well be good enough to fill the two-stroke void in your stable. The best part is the price: compared to 90% of what we see on RSBFS, this chainsaw is a veritable bargain. The opening ask started at a reasonable $3k, and bids are flying fast and furious. The Buy It Now price is a mere $4,500, meaning that this bike will likely sell before the auction is over. Check it out here, but better be quick about it. It might already be gone. Good Luck!!

MI

Buzz Buzz Buzz: 1984 Yamaha RZ 350
Cagiva November 16, 2018 posted by

9/16ths Scale: 1998 Cagiva Mito

Legendary motorcycle designer Massimo Tamburini had a long and storied career. From co-founding iconic motorcycle manufacturer Bimota, to penning some of the most striking designs in motorcycling history for the likes of Cagiva, Ducati and MV Agusta, Tamburini has been responsible for many a rider's dream machine. You might have seen some of his design genius in bikes such as the Bimota KB2, the Tesi 1D and the DB1. For Ducati he was involved with the 851/888 and the Paso and had a hand in the Supermono works. But his greatest contribution to motorcycling - his most admired design theme - was around the Ducati 916. Everything that came after it was simply a small step along this theme - including the 748/996/998 and the entirety of the MV Agusta F4 lineup. So strong was this theme that the design language translated to smaller machines as well, which is where we pick up the story on today's fantastic Cagiva Mito.

1998 Cagiva Mito 125 for sale on eBay

Powered by a single cylinder, liquid cooled two stroke, the 125cc Mito was considered as an entry level sport bike for Europe's small-bore crazed culture. Popular in areas where larger capacity motorcycles are prohibitively expensive due to taxes or license requirements the smaller scoots are immensely popular and technologically advanced. In the case of the Mito, that technology includes design elements straight off of the legendary 916, including twin headlights and the tail section. Nifty hardware includes the twin-beam aluminum frame, asymmetrical rear swing arm with preload-adjustable rear shock, Brembo binders (that's a single 320mm unit up front), 40mm Marzocchi front forks (including steering damper), 7-speed transmission and an estimated 34 HP (stock) at 12,000 RPM. Tipping the scales some 15 under 300 lbs, this is a race track replica rocket provided you are of suitable stature with the skills to keep the revs on the pipe.

From the seller:
This machine is virtually new as it only was ridden 399 km since its conversion from a stock 70mph (110 km) bike to one that will show 112 mph(180km) on the speedo.Its collectibility is enhanced by its 7 speed gearbox and of course the styling, which was done in the spirit of the Ducati 916.Being a 2 stroke machine,many states allow small displacement bikes plates for highway use or find a track site to enjoy this super handling lightweight. The mods we performed were not optimized for competition, but were done to keep the reliability and add to the enjoyment of the bike.Recently upgraded, cleaned fuel system,and new battery was fitted.

The seller claims this particular Mito has been hot-rodded, but not much info is included as to what was actually done. Generally this is done via boring out the displacement and porting the cylinder. Expansion chambers and silencers are other popular mods to help two strokes breathe better and make more power. Other than the unknown mods, this is a low mileage example that appears clean in the few, blurry photos. This has all of the hallmarks of an Evo I machine, with both the 7-speed gearbox and the tri-spoke wheels. Later Evo II models went to a more robust 6-speed gearbox and a different set of wheels. Any Mito is potentially collectible - after all we do not see them every day here in the US - but there is not enough data to determine if the 7 cog bikes are any more valuable than the 6 speeders. Either way you are in good company; even the vaunted Barber Motorsports Museum proudly highlights the Mito in their extensive collection.

This is not an auction, but rather a straight-up buy it now listing. Pricing is a fair $6,500 (especially for the low miles!), although the states in which you can register this bike might not be one in which you reside. Even if not used on this street, this little Mito will eat larger bikes alive on a tight and twisty track. Smart buyers are encouraged to check first, ask lots of questions, and do your homework. So who *doesn't* want to have a mini-916 in their quiver? It's great for show, and from the mods sounds like it is ready for some GO. Check it out here, and let your inner child racer run free. Good luck!

MI

9/16ths Scale:  1998 Cagiva Mito
Yamaha November 15, 2018 posted by

Signed by the King: 1985 Yamaha RZ500 RN

This 1985 Yamaha RZ500RN is a bread-and-butter bike for us here at RSBFS. It's an old, rare, iconic Japanese sportbike in excellent shape topped off with a few unique touches to separate it from the rest of its thin herd. What's not to like? It has covered fewer than 5,000 miles (just over 7,000 kilometers) in its 33 years, and sports a raft of recent, but period-correct, mods. Oh, yeah, and a front fender signed by 500cc Grand Prix World Champion Kenny Roberts.

1985 Yamaha RZ500RN for sale on eBay

In addition to a recent .030-over rebuild and those lovely JL pipes, the bike wears immaculate paint, and all the plastic, rubber and vinyl surfaces show evidence that the machine was stored indoors and extremely well looked after. Aside from the pipes, the mechanical rebuild featured a carb rejetting, which should work with the exhaust to wake the bike up from its corked stock specifications.

Despite their winning lineage, wild engines and potential for pace, these bikes weren't bought at the same fever pitch as their four-stroke stablemates, so finding them these days, especially ones this nice, is a feat. Prices have been a little across the map, but none can be had for cheap.

From the eBay listing:

FROM MY PRIVATE COLLECTION A PRISTINE HARD TO FIND 1985 YAMAHA RZ 500RN WITH A CLEAR FLORIDA TITLE.

I HAVE OWNED SEVERAL RZ'S/RZV"s AND THIS IS THE ONE THAT I KEPT FOR MYSELF.

RUNNING OUT OF SPACE FORCES ME TO PART WITH AND SHARE THE ENJOYMENT OF A FEW OF MY PRIZED COLLECTABLES.

THIS PIECE OF YAMAHA HISTORY THAT (NOT SOLD/OFFERED IN THE UNITED STATES) FEATURES LOW MILAGE 7423 KILOMETERS/4612 MILES (MILAGE IS IN KILOMETERS) IN IMMACULATE, PRISTINE CONDITION MY RZ 500RN HAS WORLD CHAMPION KENNY ROBERTS SR AUTOGRAPH ON THE FRONT FENDER, A PERFECT NOS FUEL TANK (THE BEST PAINT THAT I HAVE EVER SEEN), AND THE REST OF THE PAINT IS MUSEUM QUALITY.

FITTED WITH A PERIOD CORRECT J L EXHAUST, THE ENGINE WAS GONE THRU A FEW YEARS/250K AGO, WIESCO .030 PISTONS, NEW BEARINGS, SEALS AND GASKETS, CARBS RE-JETTED AND JUST THOROUGHLY CLEANED AND SYNCHRONIZED, NEW TIRES, A NEW LITHIUM BATTERY, THE HARD TO FIND OWNERS MANUAL, THE SOLO SEAT WITH EXACT MATCHING PAINT (THEY NEVER MATCH), NOS ROTORS AND PADS, REBUILT MASTER CYLINDERS, NOS TAIL LENS, NOS REAR TURN SIGNALS, NOS MORRORS

THE AUTOGRAPHED HELMET IS NOT INCLUDED IN THIS AUCTION, BUT IS ALSO AVAILABLE. THE HELMET WAS SIGNED BY KENNY ROBERTS, EDDIE LAWSON, WAYNE RAINEY, JORGE LORENZO, ANDREA DOVISIOSO, BEN SPIES, AND ALVARO BAUTISTA, AND WES COOLEY. THE BEST IN THE WORLD. ALSO AVAILABLE ARE 2 NOS STILL IN THE BOX MID SECTION FAIRINGS.

THE BIKE LOOKS, RUNS, AND RIDES BETTER THEN NEW! THIS IS A MULTIPLE SHOW WINNER AND A VERY FUN BIKE TO RIDE.

I HAVE BEEN RIDING, RACING, COLLECTING AND RESTORING BIKES SINCE GRADUATING FROM AMERICAN MOTORCYCLE INSTITUTE IN DAYTONA BEACH IN 1980. I TAKE MUCH PRIDE IN THE FEW BIKES THAT I OFFER FOR SALE. ONLY THE BEST WILL DO IN MY MINI MUSUEM. SO BID WITH CONFIDENCE. THIS BIKE STARTS UP ON 1 KICK IDLES BETTER THEN WHEN NEW AND RUNS/RIDES LIKE A DREAM.

SERIOUS BUYERS ONLY PLEASE. $500 IMMEDIATE DEPOSIT THRU PAY PAL. THE BALANCE DUE WITHIN 3 DAYS CASH OR A WIRE TRANSFER. I CAN HOLD THE BIKE UP TO 30 DAYS IN MY SECURE CLIMATE CONTROLLED FACILITY. I CAN ALSO ASSIST IN SHIPPING ARRANGEMENTS. THE CLEAR TITLE WILL BE SENT VIA FED EX ALONG WITH THE KEYS AFTER FULL PAYMENT.

ANY QUESTIONS PLEASE CALL OR TEXT 954-816-0806 BOB

HAPPY BIDDING:) BID HIGH SO YOU DON'T MISS OUT.

The buy-it-now for this machine is set pretty close to as high as you'll see them listed, but it does come with touches that similar machines can't offer, and is in really nice shape.

Signed by the King: 1985 Yamaha RZ500 RN