MotoHouston.com MotoHouston.com
Register Members List Member Map Media Calendar Garage Forum Home Mark Forums Read

Go Back   MotoHouston.com > General Discussion > Vintage / Cafe Racers
Forgot info?

Welcome to MotoHouston.com! You are currently viewing our forums as a guest which gives you limited access to the community. By joining our free community you will have access to great discounts from our sponsors, the ability to post topics, communicate privately with other members, respond to polls, upload content, free email, classifieds, and access many other special features. Registration is fast, simple and absolutely free, join our community!

Register Today!

If you have any problems with the registration process or your account login, please contact us.


FREE MH Decals by MAIL!

Advertisement

Reply
Share This Thread: 
Subscribe to this Thread Thread Tools
Old 04-26-2014, 08:07 PM   #1
DaveJHotch
davejhotch
 
Join Date: Sep 2005
Location: BACLIFF, TX
Feedback Rating: (0)
Posts: 569

Experience: 10+ years

Bike(s):
07 GSXR 600 (Sold)
06 Triumph Daytona (Sold)
Yamaha Roadstar
Yamaha Venture
Honda Shadow (Sold)

Member Garage





Send a message via AIM to DaveJHotch Send a message via Yahoo to DaveJHotch
1972 Yamaha R5

Figured I'd dip my hands into the retro build. I picked this one up today with 8000 original miles and from a single owner. It's in pretty decent condition but the tank and petcock are leaking. It turns over and idles well, but needs a throttle cable. Don't know too much about the bike but looking forward to the learning curve.
Attached Thumbnails
Click image for larger version

Name:	IMG_0237.JPG
Views:	113
Size:	391.7 KB
ID:	78061   Click image for larger version

Name:	IMG_0238.JPG
Views:	126
Size:	404.9 KB
ID:	78062   Click image for larger version

Name:	IMG_0239.JPG
Views:	96
Size:	394.9 KB
ID:	78063  

DaveJHotch is online now   Reply With Quote
Liked this post:
Similar Topics
Thread Thread Starter Forum Replies Last Post
1972/3 Honda CB350 Build Thread Deadfred Vintage / Cafe Racers 92 08-28-2015 11:25 PM
1972 Kawasaki H2 Cafe Racer - Need Professional Help MH!!! RustinR General Discussion (Moto Related) 30 05-28-2014 05:49 PM
Derek (mulatto) just bought a yamaha r5!!!! houseofpaint General Discussion (Moto Related) 8 07-17-2007 09:38 PM
Advertisement
Old 04-26-2014, 08:57 PM   #2
gots2no
Steve
 
gots2no's Avatar
 
Join Date: Feb 2012
Location: Pearland
Feedback Rating: (0)
Posts: 936

Experience: 10+ years
Trackdays: 10+

Bike(s):
'94 Kawasaki ZX6
'78 Yamaha XS750E (sold)
'82 Yamaha Seca 750 (sold)
'82 Yamaha XT200 (sold)

Member Garage





Nice find. The chrome even looks to be in good shape.
gots2no is offline   Reply With Quote
Old 04-26-2014, 09:31 PM   #3
dinosaur
Retired in place
 
dinosaur's Avatar
 
Join Date: Oct 2008
Feedback Rating: (3)
Posts: 2,312

Experience: 10+ years
Trackdays: 10+

Bike(s):
'05 Zx6-R (636)Sold









expansion chambers with those air cleaners should make it run well if they rejetted
__________________
CMRA #414
dinosaur is offline   Reply With Quote
Old 07-08-2014, 04:44 PM   #4
DaveJHotch
davejhotch
 
Join Date: Sep 2005
Location: BACLIFF, TX
Feedback Rating: (0)
Posts: 569

Experience: 10+ years

Bike(s):
07 GSXR 600 (Sold)
06 Triumph Daytona (Sold)
Yamaha Roadstar
Yamaha Venture
Honda Shadow (Sold)

Member Garage





Send a message via AIM to DaveJHotch Send a message via Yahoo to DaveJHotch
Anyone in the Kemah area know anything about this old Yamaha?
DaveJHotch is online now   Reply With Quote
Old 07-08-2014, 09:02 PM   #5
dinosaur
Retired in place
 
dinosaur's Avatar
 
Join Date: Oct 2008
Feedback Rating: (3)
Posts: 2,312

Experience: 10+ years
Trackdays: 10+

Bike(s):
'05 Zx6-R (636)Sold









I'm not in Kemah but I owned one when it was new, yea I'm an O/G
__________________
CMRA #414
dinosaur is offline   Reply With Quote
Old 07-08-2014, 10:04 PM   #6
jetcycles
DRIVEN BY ANGER
 
jetcycles's Avatar
 
Join Date: Nov 2005
Location: ShoreAcres
Feedback Rating: (14)
Posts: 12,010

Experience: 10+ years

Bike(s):
1950 Chevy Deluxe
1980 Honda CT70
1987 Kawasaki 650SX
1996 Honda Z50



Found a decent "blog" for you to read while searching for a throttle cable. . .might take a while to read.

http://www.bikersassociationofnorthd...YR5project.htm
__________________
I understand the consequences of my actions prior to engaging in those actions. . .there are certain situations in life where the risk is totally worth the reward.
jetcycles is offline   Reply With Quote
Old 07-09-2014, 12:29 AM   #7
DaveJHotch
davejhotch
 
Join Date: Sep 2005
Location: BACLIFF, TX
Feedback Rating: (0)
Posts: 569

Experience: 10+ years

Bike(s):
07 GSXR 600 (Sold)
06 Triumph Daytona (Sold)
Yamaha Roadstar
Yamaha Venture
Honda Shadow (Sold)

Member Garage





Send a message via AIM to DaveJHotch Send a message via Yahoo to DaveJHotch
Thanks for the help. Hopefully
I can get this thing worked on a bit before I get called back out to my rig. I got the thing months ago and this was the first chance I had to mess with it.
DaveJHotch is online now   Reply With Quote
Old 07-09-2014, 08:05 AM   #8
bumblebee
Yeah I'm flippin' YOU off
 
bumblebee's Avatar
 
Join Date: Oct 2006
Location: Pearland
Feedback Rating: (3)
Posts: 12,264


Bike(s):
'74 Suzuki GT380
'82 XS650 StreetTracker
'10 Ducati Streetfighter
'83 Yamaha Seca 900






Any idea what brand expansion chambers those are?
I'm on my way, as I type this, to Florida. Part of the reason for the trip is I'm gonna buy a 1975 Suzuki GT380 and bring it back. It has stock exhaust and it's gonna need chambers asap.
Mine is pretty rough looking compared to yours but it's all there and I'm only paying $500 for it.
Maybe as we go down the learning curve we can share info. I've never had a 2 stroke Street bike so this oughta be interesting.
Here's a poor pic sent by the current owner...
Attached Thumbnails
Click image for larger version

Name:	0629141943.jpg
Views:	69
Size:	83.2 KB
ID:	79834  
__________________
Asphalt is for racing... dirt is for growing potatoes. - J. Diester
When seconds count... the police are only minutes away.
Grow up and be a productive member of society already.
Bevo- "I lack skillz"
bumblebee is offline   Reply With Quote
Old 07-09-2014, 09:56 AM   #9
DaveJHotch
davejhotch
 
Join Date: Sep 2005
Location: BACLIFF, TX
Feedback Rating: (0)
Posts: 569

Experience: 10+ years

Bike(s):
07 GSXR 600 (Sold)
06 Triumph Daytona (Sold)
Yamaha Roadstar
Yamaha Venture
Honda Shadow (Sold)

Member Garage





Send a message via AIM to DaveJHotch Send a message via Yahoo to DaveJHotch
No idea what brand they are. All the chrome is flaking off. I was planning on stripping it all off and possibly having it ceramic coated.
DaveJHotch is online now   Reply With Quote
Old 07-09-2014, 10:07 AM   #10
DaveJHotch
davejhotch
 
Join Date: Sep 2005
Location: BACLIFF, TX
Feedback Rating: (0)
Posts: 569

Experience: 10+ years

Bike(s):
07 GSXR 600 (Sold)
06 Triumph Daytona (Sold)
Yamaha Roadstar
Yamaha Venture
Honda Shadow (Sold)

Member Garage





Send a message via AIM to DaveJHotch Send a message via Yahoo to DaveJHotch
DG seems to be the goto exhaust of choice for the RD350
DaveJHotch is online now   Reply With Quote
Old 07-09-2014, 10:16 AM   #11
bumblebee
Yeah I'm flippin' YOU off
 
bumblebee's Avatar
 
Join Date: Oct 2006
Location: Pearland
Feedback Rating: (3)
Posts: 12,264


Bike(s):
'74 Suzuki GT380
'82 XS650 StreetTracker
'10 Ducati Streetfighter
'83 Yamaha Seca 900






I've been looking at an outfit in England called Higgspeed that makes hand made stainless chambers. They look pretty nice.
Not sure about the price, they list it in pounds and haven't converted to dollars
__________________
Asphalt is for racing... dirt is for growing potatoes. - J. Diester
When seconds count... the police are only minutes away.
Grow up and be a productive member of society already.
Bevo- "I lack skillz"
bumblebee is offline   Reply With Quote
Old 07-09-2014, 10:41 AM   #12
signpimp
Senior Member
 
signpimp's Avatar
 
Join Date: Jan 2009
Location: Houston
Feedback Rating: (1)
Posts: 781

Experience: 10+ years
Trackdays: 10+

Bike(s):
2002 klx110









Send a message via MSN to signpimp
Jemco is another exhaust brand that works well. I've had several old two stroke street bikes.
signpimp is offline   Reply With Quote
Old 07-09-2014, 11:00 AM   #13
Yayo
Need a Ride?!
 
Yayo's Avatar
 
Join Date: May 2014
Location: HTX
Feedback Rating: (0)
Posts: 273

Experience: 2 years

Bike(s):
2005 CBR600RR
2001 GSX-R 600 (Sold)








awesome bike diamond for sure
Yayo is offline   Reply With Quote
Old 07-09-2014, 11:46 AM   #14
jetcycles
DRIVEN BY ANGER
 
jetcycles's Avatar
 
Join Date: Nov 2005
Location: ShoreAcres
Feedback Rating: (14)
Posts: 12,010

Experience: 10+ years

Bike(s):
1950 Chevy Deluxe
1980 Honda CT70
1987 Kawasaki 650SX
1996 Honda Z50



Quote:
Originally Posted by signpimp View Post
Jemco is another exhaust brand that works well. I've had several old two stroke street bikes.
Jemco is local and will build you any custom exhaust you want. . .
__________________
I understand the consequences of my actions prior to engaging in those actions. . .there are certain situations in life where the risk is totally worth the reward.
jetcycles is offline   Reply With Quote
Old 12-08-2014, 05:55 PM   #15
Fritzcoinc
Member
 
Fritzcoinc's Avatar
 
Join Date: Dec 2008
Location: Cypress
Feedback Rating: (0)
Posts: 20

Experience: 10+ years
Trackdays: 2

Bike(s):
Moto Guzzi V1100 Sport
Honda XR650L
BMW K1200GT
Husky 400 XE
Husky Te610e






I had a purple and white one of those back in 73 or so. The big problem with those engines was air leaks around the primary drive gear and it's keyway. The leaks sneak up on you and hole the right piston. Easy fix though. Pull cover, clutch, primary gear and seal the gear and key way with silicone or similar to the crank. Intake manifolds crack as well causing air leaks.
__________________
Enjoying my last V8
Fritzcoinc is offline   Reply With Quote
Old 12-11-2014, 08:06 PM   #16
rz500guy
Senior Member
 
Join Date: Jul 2010
Location: The Woodlands
Feedback Rating: (0)
Posts: 128

Experience: 10+ years
Trackdays: 10+

Bike(s):
Yamaha RZ 500
Suzuki 1200 BanditS
RD 350
1990 Yamaha FZR 400






Pipes on the R5 look like JR expansion chambers. Most important is check that the jets are correct. Mains need to be at least 170 with the breathers. Pilots should be 25 to 27.5. The needle you will have to play with. The bikes do not run great with the breathers. Here is some help. Wish you were closer. I am in Spring area. I have had each of the bikes. Jemco does have patterns for expansion chambers for both bikes. I have miscellaneous RD stuff also. Chime in if need. I am not on site much.

The carbs being clean is the biggest thing, second is good points, and a dial indicator to help set timing. You can use the stock marks but it is best to check them. Left seal failure equals seizure and right seal oil foul plugs. There is a guy that just moved to Stephenville near Lockhart that specializes in RDs. Have not met him but talked for a while.

The GT 380 is a beautiful bike when cleaned up. Not very fast because of weight, but extremely smooth. With stock pipes it is really quiet on the road.

Good tech info
http://usa2strokers.com/forum/default.asp

http://www.rzrd500.com/phpBB3/

Good site for parts on RD and the GT
http://www.economycycle.com/servlet/StoreFront

Expansion chambers and nice pictures of the GT
http://higgspeed.com/SUZUKI-GT380

Breather kit for RD
http://www.economycycle.com/servlet/...oot/Categories

The one I should have kept
250 zpsd6aba8ed
rz500guy is offline   Reply With Quote
Old 12-11-2014, 08:40 PM   #17
rz500guy
Senior Member
 
Join Date: Jul 2010
Location: The Woodlands
Feedback Rating: (0)
Posts: 128

Experience: 10+ years
Trackdays: 10+

Bike(s):
Yamaha RZ 500
Suzuki 1200 BanditS
RD 350
1990 Yamaha FZR 400






Nice sound of 380 with chambers

rz500guy is offline   Reply With Quote
Old 12-11-2014, 09:13 PM   #18
bumblebee
Yeah I'm flippin' YOU off
 
bumblebee's Avatar
 
Join Date: Oct 2006
Location: Pearland
Feedback Rating: (3)
Posts: 12,264


Bike(s):
'74 Suzuki GT380
'82 XS650 StreetTracker
'10 Ducati Streetfighter
'83 Yamaha Seca 900






Thanks for the info! I did wind up getting the GT380 and have been riding it for a few months. Runs great!
I decided against putting chambers on it, at least for now. It runs so well that I just can't bring myself to mess with it.
You're right it isn't super fast but it IS smooth. Still have a little jetting to do as it falls off at high rpm. I put pod air filters on it and it was pretty lean on top.
Went up a couple jet sizes and it's better but not quite there.
__________________
Asphalt is for racing... dirt is for growing potatoes. - J. Diester
When seconds count... the police are only minutes away.
Grow up and be a productive member of society already.
Bevo- "I lack skillz"
bumblebee is offline   Reply With Quote
Old 12-11-2014, 09:35 PM   #19
rz500guy
Senior Member
 
Join Date: Jul 2010
Location: The Woodlands
Feedback Rating: (0)
Posts: 128

Experience: 10+ years
Trackdays: 10+

Bike(s):
Yamaha RZ 500
Suzuki 1200 BanditS
RD 350
1990 Yamaha FZR 400






The pods do not run well on two strokes. Do a plug read. Run the bike thru about 4 gears at top revs. Pull the clutch in and hit kill switch at same time and coast to a stop clutch in. Take plugs out and look at color. Should be a tan color. Have you adjusted oil pump correctly? The newer two stroke injection oil is much better and can run at a lower ratio. You running NGK B8 plugs and what do you have the gap at. Those bike are really comfy at highway speeds. Beware those solid foot pegs can be brutal in an accident. Have you cleaned and repacked the silencers?
rz500guy is offline   Reply With Quote
Old 12-11-2014, 09:39 PM   #20
TomballD
Senior Member
 
TomballD's Avatar
 
Join Date: Jul 2009
Location: Tomball
Feedback Rating: (5)
Posts: 8,627

Experience: 10+ years

Bike(s):
DR350
XR50
TDub-200
XR100-Tarded
1981 XR80






Wow that sounded bad
TomballD is online now   Reply With Quote
Reply


Thread Tools

Advertisement


All times are GMT -5. The time now is 11:53 PM.


MotoHouston.com is not responsible for the content posted by users.
Privacy Policy