Monday, August 13, 2007

R5C 350 Riders Manual



Seeing as it's extremely hard to come by these days, and seeing as how mine is slowly crumbling, I figured I'd scan and post the "Rider's Manual" that came with the R5 when it was new. Fair warning though, it's a fairly large file. Enjoy!

R5C 350 Riders Manual (25.5 MB PDF)

Monday, August 6, 2007

Martin's Gorgeous R5 on EBAY!



Martin wrote in this morning to inform me that his YR5 (featured previously on this site here an here) is currently up for auction on Ebay UK.

Here is his auction description:

Yamaha YR5 350cc 2-stroke twin also sometimes designated the R5

This is an original UK bike, it has some history to suggest that it was raced in the early 70s and then converted to road use. It has only had 3 owners. The 2nd owner died in 1980 after which his widow stored the bike until it was sold to a family friend in 1999, since then it has stood almost unused for 7 years until I bought it last year.

I recommisioned the bike from the ground up

New battery

Full service,

Mot,

Hagon rear Shocks

New screen & Nosecone,

Reground Fork Stanchions and seals

The frame has been powder coated

and many parts chromed.

It has been a great bike to ride and has always drawn crowds at places like Matlock Bath. But unfortunately I suffered a seized the engine when the right hand 2 stroke oil pipe came loose.

After searching all year I have managed to find some original NOS pistons, rings& gaskets from America and Japan and have had it rebored by PJ engineering (motorcycle engineering specialists of Wolverhampton).

So far it has been rebuilt and started, that’s it. It sounds ok and has not currently done any miles.

I realised this bike is too rare to use regularly. So I have bought myself an Aprilia 250 because I enjoyed the two stoke so much

This bike deserves a collector, or Yamaha Dealer as a show piece, it would be great to parade or show.

The bike is in a Phil Read replica colour scheme, It has original Mead speed sports fairing, race tank & seat. The wheels have been upgraded at some point to RD400 alloys.

The exhausts are 1970’s originals and are stamped into the metal “Codnor Light Fabrications” this is a Derbyshire company that we now know as Micron.

It is fitted with Piranha Electronic ignition and starts first or second kick every time.

Front brake is disc with braded hoses using a standard RD350 front calliper & disc, so parts are no problem

I have some correspondence that the last owner past on to me from Padgett’s of Batley, plus Classic Bike, Yamaha, and Len Manchester motorcycles. This seems to support the case that the bike was prepped for racing, as many where from new and then put on the road by the 2nd owner. This seems correct as the fairing tank seat exhausts etc are all period early 1970,s but the rear light is from an RD400 which was not made until 5 years into the 70,s

Also included are the original Yamaha workshop manual and several magazine articles from magazines of the time in the early seventies

This is probably the only surviving example of a Yamaha proddy racer put on the road in the uk. Grab a real pierce of nostalgia.

I am selling as I have 5 bikes and my daughter is about to turn 16. I need the space for her 1st bike!!!!

The bike is MOT,ed and Taxed to October. The tax is free as it is tax exempt! The bike is in immaculate condition and is ready to show

Please ring for extra photos and spec.
Martin 07988800194

Thursday, August 2, 2007

Update - Labels Added

Just added labels to all of my posts on this site. At the very bottom of each post you'll see a grouping of word(s) that categorize the post. Clicking on one of the words brings you to a single page with all of those posts. Useful if you want to see all the technical posts, posts with downloads, or say all posts about my R5 all at once, without searching or using the archive.

Colin's R5



Colin writes in to tell us about his recently acquired R5:
I have been looking for a nice two stroke for some time now. Something that was relatively cheap, but ran. I wasn’t looking for show quality or anything just something to get around DC on and tinker with. I came across this ’71 R5 owned by an older gentleman for over 30 years. Cosmetically it has seen some wear but the engine runs great and sounds great too. I sent along some pictures. This is exactly how I bought the bike. How about that sissy bar, amazing. Fortunately in about ten minutes the sissy and highway bar come right off. Short term I am going to put some clubman bars and some rearsets. Then slowly when the money comes in will start cleaning up the parts. It was a wedding present for myself. Great website about the only place I found good useful information on the bike.

Excellent find!

Sounds like you're on the same course as I am, with clubmans and rearsets. Funny, my bike came equipped with almost the exact same sissy bar! Weird scroll thing going on...

Thursday, July 5, 2007

California Classic Japanese Motorcycle Club Show and Swap Meet



When: 2007-07-20 through 2007-07-22, 8a.m. - 3p.m.
Location: Auburn County Fairgrounds, 1273 High Street
Cost: No charge for spectators

Largest exclusively classic Japanese motorcycle swap and show in the country, held in the beautiful Sierra Foothills at the Auburn Gold Country Fairgrounds! ONLY JAPANESE MOTORCYCLES. This is a must participate event! Hundreds of bikes, parts and more! Bring your bike to show and parts to sell! Show on Sunday only - Open to all! - Shaded area for swap meet - Shaded stage for show bikes! (with seating) - Food with drinks on premises - Camping overnight 10 dollars per car – No Fires - RV Overnight with hookup 20 dollars - AMA Speedway Races Friday night! - Swap 35 dollars per swapper / space - For Sale - Bike Corral 10 dollars - 15 dollars to show one, 20 dollars for two or more bikes - Peoples Choice Awards


Of particular interest to us fellow R5 enthusiasts is that this year the show is honoring the Yamaha 2-stroke twins: R5s, DS7s and RDs. Usually this means a lot of these bikes showing up at the show and an image of the bike on the show t-shirt.

Wish I could be going... but since I'm on the wrong coast, someone local will have to go and snap some pics for the site!

(Info gleaned from cjmc.org, Hemmings Motor News Calendar and r5yamaha Yahoo! message board)

Thursday, June 21, 2007

R5 Wiring Diagrams



Ok kids... a lot of you have been asking about electrical issues. Seems these bikes (as just about anything 30+ years old!) have a bunch of gremlins, and it can be a real pain sorting everything out. I'm in the middle of it myself. So I thought I'd revamp the diagrams on the site as well as highlight them all in one post here.

- R5C Wiring Diagram - from the 1972 Rider's Manual
- R5F Wiring Diagram - not a US model
- RD 250/350 Wiring Diagram - for reference, should you need it

Also here are two diagrams tracing the physical wiring harness as shown in the factory Service Manual to help you locate everything:

- R5C Wiring Harness Diagram 1
- R5C Wiring Harness Diagram 2

And finally, here is a link to a PDF of the electrical section of the factory Service Manual (via OMP).

Gotta love all the hand-drawn complexities and typos throughout! Anyways, I hope this helps!

The German Roots of Yamaha Motorcycles



Good article over on the Kneeslider about the German roots of early Yamaha motorcycles.

Wednesday, June 20, 2007

Great Reader Mail

Dave Hess from Selinsgrove, PA, wrote this excellent letter to me earlier this week. Stuff like this makes working on this site worth the while:

Lawrence:

Two months ago my mother had to move to an assisted living home, so we had to clean out the old homestead. I came across my old Yamaha R5B I parked in her summer kitchen (shed) back in 1979. Wow, what a mess! I was going to roll it into the dumpster we rented but my brother told me I should try to get a few bucks for it on ebay. When I checked the prices these old bikes were bringing on ebay I just about fell off my chair! I decided to try to clean the bike up in hopes of upping the value of the old girl.

Needless to say, when I saw the shine come back on those fenders and the mandarin orange paint come back to life, it took me back to my college days when I used to jam a few bucks in my pocket and disappear on my R5 for days on end. That old sense of freedom I had back when times were much simpler struck me! All I wanted to do was fire up my old R5, listen to her throaty two-stroke rumble, smell the blue smoke coming out of her exhaust and ride into the sunset! I remembered riding with a gang of my friends back in the 70's, and just what a performer my bike was. They all had bigger bikes with far more cc's, but my R5 just blew them all away.

In doing research on the bikes I came across your website, which I must tell you is a real breath of fresh air. It shows the genuine appreciation you have for the Yamaha R5's and it has really motivated me to get my bike back on the road. Needles to say, I'm about half way through my restoration project. I'd like to share some pictures when I get a chance.

Thanks for the site. It's a real pleasure and something I look forward to seeing when each update comes to the net!

Dave Hess
Selinsgrove, PA


Dave, thanks for the great letter! I'm also very proud to know I played a (small) role in getting your bike back up and running. Please send in those pics and keep us updated!

Saturday, June 16, 2007

Rebuilding the Carbs



Finally got a nice Saturday with no real plans - except tackle the R5's nagging problems, of course!

Drained the oil and transmission fluid, cleaned the carbs, and right now the bike is slowly coming back up to charge. We'll see how I did soon enough...

Friday, June 8, 2007

Jesse Writes In



Jesse from Arlington, Virginia, writes in to share some pics of his newly-acquired R5 and ask a few questions:

Hi Lawrence,

I just came across your R5 website. Very nice! I just took posession of my 1st R5 this weekend. It's an orange 1972 R5C that is need of some restoration. I have restored 4-stroke British bikes in the past (I'm currently riding a 1978 Triumph) but this is my 1st 2-stroke machine. Are there any listservs, discussion boards, etc. that focus on the R5 or Japanese 2-strokes in general?


Good-lookin' bike, Jesse! Love the exhaust! You can see more of Jesse's bike on his Flickr page.

Jesse raises a good question in his email. I've gotten a bunch of similar emails from other readers who are looking to ask questions in a firum setting. I've come across a number of sources for R5-related info in my research - here are a couple of links:

Here are some discussion groups:

Yahoo! R5 group - http://autos.groups.yahoo.com/group/r5yamaha/
Yahoo! YDS Owners group - http://autos.groups.yahoo.com/group/yamahaydsownersgroup/

A couple of other forums to try - much more generic, for a wider variety of bikes:

USA 2Strokers - http://www.usa2strokers.com/forum/default.asp
OBB - http://www.oldbikebarn.com/cgi-bin/yabb/YaBB.cgi
Cycle Forums - http://www.cycleforums.com

There are also some shops out there dedicated to these bikes. Some good ones that come to mind are:

HVC - http://hvccycle.com
Moto Carrera - http://www.motocarrera.com
Spec2 - http://www.spec2.com
Omar's - http://omarsdtr.com

Check out the links in the sidebar for more. Hope that helps!