Posts by tag: parallel twin

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Yamaha September 12, 2022 posted by

Re-Californication: 1984 Yamaha RZ350

The Yamaha RZ350 was the last of the federally imported two strokes into the EPA-heavy state of California. With precise oil injection, the Yamaha Power Valve System (YPVS) to maximize efficiency, and air-injection and catalytic converters in the exhaust stream, this was the cleanest factory smoker on the planet in 1984. Sadly this was not enough for California, and the bike lasted but a year in that market. The RZ350 still sneaked through emissions in other states however, before Yamaha pulled the two stroke plug in America one year later. Today’s example is a nicely refurbed bike in California that shows some miles and a whole lot of care. I’ll let the seller pick it up from here.

1984 Yamaha RZ350 for sale on eBay

From the seller:
Yamaha RZ350L1984 Kenny Roberts Replica

The bike was purchased as non runner earlier this year. It had sat since last registration in 2016.
The bike ran when parked, but of course was parked for a reason!

Thousands have been spent to re-commision this lovely RZ. It starts first/second kick, pulls all the way to the red line and sounds as an RZ350 should. This will make a great rider, it does have some wear and tear which we have detailed. A good honest bike that just needs to be used and enjoyed. All the hard work as been done!, bid with confidence on this appreciating classic.

Clean CA title – currently registered.
15300 original miles.

More from the seller:
History: A considerable amount had been spent on the bike by the previous owner around 2015-2016 which, included engine work at RZ’s Unlimited of Glendale.

Work completed includes:
Crank Rebuild
New Crank Seals
New Pistons, rings
New water pump
Y Boot & K&N
Spec II pipes
Carb jetted to suit above
Telefix Fork Brace
Stainless Braided brake lines F&R
Penske – full adjustable rear shock with remote

An RZ350 owners manual is included along with a few old receipts, showing purchases of pipes, fork brace etc.

The RZ350 market remain a hot spot for bikes in clean condition. Prices are ever-so-surely climbing – especially for bikes in good or exceptional condition. This is not an NOS stock example, having been rebuilt and slightly hot-rodded with Spec II chambers and jetting. But in many ways THIS is the type of RZ you really want. Bikes that have been woken up by the cat delete and mild performance work are snappy and fun, being both lighter and more powerful than the museum correct examples. And with a relatively recent rebuild and some nice chassis add ons this RZ is ready to spread the popcorn sound of joy throughout the neighborhood and surrounding canyons. Nearly a week left at auction and the reserve has already been met, so don’t miss out! This bike is well presented and beautifully photographed. Check out all of the details here, and Good Luck!!

MI

Re-Californication: 1984 Yamaha RZ350
Yamaha July 20, 2022 posted by

I Love the Smell of Castor Oil in the Morning: 1985 Yamaha RZ350

Another beautiful summer’s day, another beautiful Yamaha RZ350. Every year – like clockwork – when spring has sprung the RZs pop up out of hiding like dandelions. Few bikes are as coveted as the last of the factory, street going two-strokes, and pushing nearly 40 years on in the US these are getting harder to find in good, presentable condition. Sure, they exist – but patience is a key implement in the collector’s toolkit. The find we offer up today is clean and complete, with light modifications compared to some. If you are in the market for a rider, this is definitely something to check out.

1985 Yamaha RZ350 for sale on eBay

RSBFS has probably written a million words about the RZ350 over our tenure, and within the ultra-plush offices of the RSBFS building (once again open after the pandemic forced us all into remote work situations) discussions rage over oil ratios; debates over castor vs synthetics are common. Sufficed to say, the RZ350 – known as the RD350LC in other regions – was (for the US) a welcome return and a last gasp of the legendary RD lineup. Offering modern technology such as oil injection, Yamaha Power Valve System (YPVS) moveable exhaust port, evaporative canisters and catalytic converters in the exhaust system, the parallel twin RZ350 was very briefly a street legal motorcycle in all 50 states of the union. Couple that with the star power of Kenny Roberts (initially only the yellow/black bikes bore his sig, but the 2nd year offered them on the red/white as well), and the RZ brought dreams of GP riding to the masses.

From the seller:
1985 Yamaha RZ350 KennyRobert. Top end job on it. Wiseco 2.5 MM over pistons, new rings, wrist pins,wrist pin bearings, circlips and gaskets. Power valves cleaned and new seals,Oil Pump Rebuild w/ new seals and gaskets, Performance exhaust, Fuel Petcock Valve Switch Assemblycleaned and new rebuilt. Bike is jetted highaltitude (also have standard jets) and runs great, starts easy and nooverheating problems.

Brakes completelyrebuilt front and rear, rebuilt Master cylinders, calipers, and new stainlesssteel brake lines. The oil injection pump cleaned and rebuilt, is hooked up andfunctions. Fuel petcock rebuilt with new diaphragm and seals. There is a singleK&N air filter with the two into one intake, there is a tool kit that isnot stock, just something I put together for the bike.

If you like the sound ofa two stroke on the pipe, you will love this bike, there’s nothing like it. Ifyou have any questions or would like more pics, let me know.

Fast forward to today, and many of the mass produced RZ350s have been trashed, hooned, raced, modded, and destroyed. As values on the bikes fell, they became disposable transportation for squids everywhere. Today these are legit rare motorcycles when found in decent condition. Common mods include all the usual two-stroke tricks: replacing the cat-equipped exhaust with proper expansion chambers, re-jetting and opening up the breathing, porting, milling the head for increased compression, etc. This bike has some mods which would preclude “all original” museum style seekers, but looks to be complete and a fun rider. It certainly looks to be in great condition from the pictures. Here is a video from the seller – we apologize but RSBFS can do nothing about the supplied video orientation.

This auction runs through the end of the weekend, has a nominal number of bids, and at time of writing is still well below the $10k mark. That is very much “in the ballpark” money currently, and it remains to be seen if this will turn into a bidding frenzy before it is all over. Check out all of the details here, and Good Luck!!

MI

I Love the Smell of Castor Oil in the Morning: 1985 Yamaha RZ350
Suzuki June 9, 2022 posted by

Think Small – 1987 Suzuki RG250 Gamma

Most often we find the junior two-strokes in a much sadder state, but this one has been given some recent attention.  This Canadian example might be a good entrée into the smoky side of sportbikes.

1987 Suzuki RG250 Gamma for sale on eBay

Suzuki seems to have had a 247cc two stroke twin in the line-up forever, but the RG250 and Gamma took the model to sportier places.  For 1986-7 the Mk. 3 Gamma used a power valve – Automatic Exhaust Control in marketing lingo.  49 hp was a slight increase but the width of the power band was the emphasis.  Revised brakes were dual four-piston affairs, and the forks included an anti-dive circuit.  The Full Floater monoshock had made its way over from the motocross side and allowed the shock to be positioned further forward, centralizing mass, and the fully adjustable shock could be shorter and use lighter springs.  16-inch front /18 rear tires have -80’s stagger, but with a 100mm section not much width.

Though not quite a full resto, this owner has done more than just paint work and gives some options to the next rider.  Some rubber hole plugs and a bar-end mirror might slip this 250 through the air easier, and as problematic as they can be, some lower profile front blinkers seem to be in order.  The white wheels are the next cosmetic item, or they could go black and pretty badass.  With new tires, brakes and battery, more improvements could be made without taking it off the road.  A short – video – is offered, along with notes from the eBay auction:

Numbers matching engine and frame and the bodywork is original – not aftermarket.  Original Canadian Bike.
 
The bike was originally the two tone blue and white but was repainted in the factory correct 1987 colour red/black and white (it just looks better with this livery)
 
Sounds great – tons of power for the size and razor sharp handling with the aluminum twin spar frame (it was known as the first street legal race bike)
 
Parallel Two Cylinder with Suzuki’s AEC system – Automatic Exhaust Control – power is about 50 hp and weight is under 300 pounds! Full Floater Suspension, Six Speed transmission.
 
– Brand new tires
– Brakes fully rebuilt
– Brand new battery
– New upholstery on seat

Only the reserve will tell whether this owner considers this a finished piece or a nice rider with a few details to address, and of course repairs which any 35 year-old bike can expect.  Many RG250’s are shown without the lowers, and the factory fairings are a strong positive.  At this point in their lives, most have less miles but more corrosion on the exposed aluminum.  A lot of pluses and minuses to weigh over the next few days.

-donn

Think Small – 1987 Suzuki RG250 Gamma
Yamaha May 18, 2022 posted by

Hive Mentality – 1984 Yamaha RZ350

With spring in full swing and summer right around the corner RZ350s are popping up like, well, weeds. Scare in quality and quantity, 2022 has brought out a spate of strong contenders; bikes that present as well as any we have seen. So too is today’s find, a 1984 bumble bee 350 out of Montana that looks fantastic.

1984 Yamaha RZ350 for sale on eBay

Needing no introduction – but getting one anyway – the RZ350 was the last gasp of two-stroke street bike goodness in the early 1980s. Festooned with YVPS, oil injection, catalytic converters and EVAP canisters, the RZ was as close as EPA legal as could be with 1984 technology. Significantly choked by the emissions equipment (which was also very, very heavy), most RZs enjoyed a life on steroids – dropping the cats for a pair of expansion chambers, new fatter jets and improved upstream airflow. The RZ350 was an over achiever, running with the 550cc middleweights of the day, and were popular club racers to boot. Today, these are hard to find in many parts of the country, and harder still to find in original – or close to original – condition.

From the seller:
I am slimming down my collection, so its time for this time capsule to go. I purchased this 1984 RZ350 from the original owner in 2010. Its been in my garage ever since, in dry Montana, so there is very little corrosion. It has 3,714 original miles. I will also include the original exhaust pipes (photos coming soon). Overall, the bike is in very, very good condition for its age. Its not pristine, but very nice! The tires are old, so they are due for replacement and the brakes could probably be bled. There are a couple stickers on one of the fork tubes that can be removed.

More from the seller:
The original owner installed Spec II exhaust pipes. The airbox and intake are stock. It has steel braided brake lines on the front, and a Telefix fork brace.

There is no evidence of the bike ever being down. The seat is perfect. The gas tank has no dents and is very near perfect. It starts from cold on the first kick and idles perfectly.

I have a clean and clear Montana title.

The seller has also shared a cold start video on this bike:

RZs are worth real money these days. You can forget when you could pick up a beater for a grand or less; there is no value in lamenting the great one you sold for $2k. This is the ups and downs of the market, and while the RZ has had its unfair share of downs, it is currently on a credible upswing. The bidding on this very clean bike with period correct aftermarket add-ons (with original pipes available!) is well over $10k with a lot of interest. The reserve is still in place, so there is likely a lot more to play for. Only 3,700 miles on this time capsule, meaning that the winning bidder will have a lightly used rider that shows as well as any we’ve seen. Check out all of the details here, and Good Luck!!

MI

Hive Mentality – 1984 Yamaha RZ350
Yamaha May 13, 2022 posted by

The Same, But Different: 1984 Yamaha RZ350

In an earlier post, RSBFS Staff Writer Donn notes: Hardly a week goes by that a new RZ350 doesn’t pop up these days! I would like to take this opportunity to upgrade that statement considerably. Because today we have a double RZ350 Friday (take two – they’re small)! Forget Friday the 13th. This is Friday the RZ350th!

1984 Yamaha RZ350 for sale on eBay

This particular RZ shows very differently than the 1985 model posted by Donn HERE. This RZ seems to have a bit less info, and a potentially greater number of unknowns. It is clear that it has experienced some modifications along the line, from Airtech bodywork to updated expansion chambers, bar end mirrors, a complete replacement top end (with YPVS delete), and what appears to be some minor rash on the right-hand side case. But it is a RZ after all – and remains very popular with readers and riders alike. There are pristine, museum-style offerings that go for big, big bucks, ridden and hot rodded bikes that go for elevated prices, and then there are the bottom feeder bikes that have been used up, abused often and offered at a ridiculous price. This particular example feels more like the middle tier – modded and used, but presentable – and is pretty close in pricing to the 1985 example posted by Donn earlier today.

From the seller:
This 1984 Yamaha RZ350 is an original. The owner has had it for 5+ years. The vehicle runs great and is mainly used for weekend rides.

Bike has had a small restoration. Frame and swing arm have been powder coated. All new seals in components forks, front brakes, front master cylinder, etc. Has Airtech full fairing kit. Does not have YPVS anymore currently has a banshee top end. I do not have any of the original parts. Thanks for looking.

The seller has included the following walk around video of this particular bike. I am not exactly sure why one of the foot pegs is zip tied up out of the way, but otherwise the video shows a clean – but modified – RZ350:

Regardless of condition, RZ350s are hot property. That value is increased as the weather turns to a point where riding is possible around the country, and we are all itching to grab our leathers and hoon. And while we always recommend collectors purchase the best example they can find/afford, the truth of the matter is the RZ will always be in demand; even questionable bikes are fetching absurd prices. We do not see that changing at all in the future, except the prices are likely to be even higher. These are fun machines that really wail, they strike a pose very well in parking lots for bike night or cars and coffee, and are reasonably reliable given the volatile nature of two strokes. You can check this one out here as a compare and contrast – this is a great time to be in the RZ market!!! Good Luck!

MI

The Same, But Different: 1984 Yamaha RZ350
Yamaha March 25, 2022 posted by

Quick Smoke Break: 1985 Yamaha RZ350

There seems to be a marked increase in available RZ350s as of late, a clear sign that Spring has officially sprung. Amongst the frenzy of activity with trading, selling and buying (not to mention how hot the collector market is these days), this is a quickie smoke break from the high dollar exotica and represents something that readers want to see and can likely afford. I will warn you that time is short and bidding strong on this one, but the price remains in the reasonable range and there is still a reserve at play.

1985 Yamaha RZ350 for sale on eBay

The 1985 Yamaha RZ350 differed only slightly from the 1984 model in the US. The biggest visual clue is that the Red/White bikes had King Kenny’s signature on the fairing; in the inaugural year this was only available on the bumblebee-colored models. Otherwise you are looking at the same liquid cooled, parallel twin with dual carbs, reed valve induction, oil injection and the novel YPVS computer controlled exhaust port.

From the seller:
1985 Yamaha RZ 350 from private collection excellent condition no issues runs great sorry do not have original pipes.

Today’s bike has seen some miles (but not many – only 5,000 on the clock!), and has the requisite performance upgrade of replacing the stock catalytic converter-equipped exhaust with proper expansion chambers. This is usually best accomplished with related jetting (and sometimes airbox) changes, but no background history if that was done. There is also no word on the type of expansion chambers fitted; perhaps our eagle-eyed readers can help out with that one. The bike looks undeniably clean, which is a real plus. I am somewhat perplexed by the lack of the black chrome finish on the left side of the engine, but not on the right. But this otherwise looks like something that could (and should) rattle to life in a cloud of smoke that brings smiles to all. Check out all of the details here, and Good Luck!!

MI

Quick Smoke Break: 1985 Yamaha RZ350
Kawasaki January 19, 2022 posted by

Anarchy in the UK: 1989 Kawasaki KR-1S 250

Although most RSBFS readers are demographically located in the US, I say never mind the bollocks. Sure, this KR-1S is located in Jolly Olde England, but it is a freaking KR-1s! Possibly the rarest of the regular 250cc two stroke set by manufacturer, the KR series has a reputation for being fast, fast, fast.

1989 Kawasaki KR-1S for sale on eBay!

Of all of the quarter liter smokers, the Kawasaki was generally considered a bit of a failure. Suzuki, Honda and Yamaha dominated the sales floor, as the more rare Kawasaki lagged behind. The downside of the fast, fast, fast component of the KR-1 is that these have also been known to be somewhat fragile, but those that have survived are piquing the interest of collectors. What was a relative “failure” to sell in the day makes this all the more rare today. And today’s sub-8,000 mile example is one that is worth a look.

From the seller:
Kawasaki kr1s 250
1989 g reg
7900 miles from new
1 former owner first for 30 years
Original order as good as they come
Original tool kit under seat /handbooks /
Original number plate /1 key fits all locks
Does run but could do with a service and mot
Bodywork near immaculate
Any questions viewings welcome

There is not as much info as we might like to know, and only a few pics of this beauty. The ask is $11,500 USD – which is significantly below the nearly $18k asked for this 1991 California plated dream machine. If you can handle the shipping and importing, this could be a find. Only 10,000 total units of the KR-1 250 series were made, with fewer being the KR-1S model as seen here (and rarer still, the coveted R model).

Check out all of the details on this 1989 Kawasaki KR-1S here. Good Luck!!

MI

Anarchy in the UK: 1989 Kawasaki KR-1S 250
Yamaha May 25, 2021 posted by

Blue-Grey Smoker – 1989 Yamaha RZ350

Today’s RZ350 is the fully-faired F2 model which was never imported to the U.S.  Looks like a very nice survivor which should be an easy import.

1989 Yamaha RZ350 for sale on eBay

Water cooling let the RZ350 make better power with 63 hp, than its air cooled predecessor, the RD400.  And the YPVS power valve stretched the power band, though reviewers reported a big character change at 6,000 rpm.  Expansion chambers were factory equipment, as were multi-adjustable forks and pre-load adjustable MonoCross rear.  Triple 260mm disks were appropriately sized and 18-inch wheels were cast in black aluminum.  The full fairing had the same big side vents as the older brother RD500.

The RZ looks quite stock with astounding paint, if it’s indeed original.  Details of the faux pas seems to be attributable to a single incident.  Both blue and black seats have been seen with this livery, so this one might be factory, though most RZ350 rims have a polished edge so they may have been sprayed.  Guess a magnetic tank guard will be a little late to the party but will cover those nicks.  Comments from the eBay auction:

Legendary two stroke Yamaha bike in very good original condition (they are only original once as they say).

–  Numbers matching – original motor, never taken apart – original tool kit

–  Collector owned, stored in indoor heated space. Running and riding bike – has been out for use in 2021

–  11,000 original km (6835 miles)

–  Oil injection functional (no need to mix gas/oil)

–  Runs great – lots of power

–  Canadian spec model – 2nd last year of production

–  Great colour scheme – never available in the USA (Canada’s run of RZ350 went from 1983 to 1990 whereas the USA only got them 1983 and 1984)

–  Front brake rebuild 2021

–  Tires are in good condition – needs nothing to pass safety certificate

Even though is was only here for a couple of seasons, the bikini-faired RZ was pretty popular, so imports aren’t all that common.  The full bodywork hides the water-cooled mill and looks pretty racy to boot.  It’s high ( reserve ) season, so we’ll have to keep an eye on where this auction goes.

-donn

Blue-Grey Smoker – 1989 Yamaha RZ350