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Author Topic: RD250E  (Read 3775 times)

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Offline Bodd

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RD250E
« on: May 31, 2013, 11:46:29 AM »
My previous restoration.



« Last Edit: May 31, 2013, 11:51:14 AM by Bodd »
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Offline cb650

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Re: RD250E
« Reply #1 on: May 31, 2013, 04:16:12 PM »
Very nice.  Always liked the rd's.
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Offline grcamna2

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Re: RD250E
« Reply #2 on: June 05, 2013, 01:03:36 PM »
I wonder if you can fit an RD400 top end on that little 250 ?  ;D
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
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Offline becken

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Re: RD250E
« Reply #3 on: June 06, 2013, 05:42:00 AM »
Quote from: grcamna2 on June 05, 2013, 01:03:36 PM
I wonder if you can fit an RD400 top end on that little 250 ?  ;D
This would be the place to ask that question:
http://www.2strokeworld.com/forum/index.php
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Offline SteveH

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Re: RD250E
« Reply #4 on: June 06, 2013, 08:14:46 AM »
What a beauty
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Offline simon#42

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Re: RD250E
« Reply #5 on: June 06, 2013, 11:00:16 AM »
Quote from: grcamna2 on June 05, 2013, 01:03:36 PM
I wonder if you can fit an RD400 top end on that little 250 ?  ;D

the rd 400 has a longer stroke than the 250 so is not a straight swap
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Offline grcamna2

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Re: RD250E
« Reply #6 on: June 10, 2013, 03:38:28 PM »
Quote from: simon#42 on June 06, 2013, 11:00:16 AM
Quote from: grcamna2 on June 05, 2013, 01:03:36 PM
I wonder if you can fit an RD400 top end on that little 250 ?  ;D

the rd 400 has a longer stroke than the 250 so is not a straight swap

I think the finished product would be a BLAST  ;D ! even with the extra required machine work.
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline LesterPiglet

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Re: RD250E
« Reply #7 on: June 10, 2013, 04:00:52 PM »
Just get the 400....
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'Then' and 'than' are completely different words and have completely different meanings. Same with 'of' and 'have'. Set and sit. There, their and they're. Draw and drawer. Could care less/couldn't care less. Bought/brought FFS.


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Offline simon#42

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Re: RD250E
« Reply #8 on: June 12, 2013, 10:41:42 AM »
Quote from: LesterPiglet on June 10, 2013, 04:00:52 PM
Just get the 400....

yes that is the answer , the 400 cases and crank are different and you cant put the 400 crank in the 250 . you can fit the earlier 350 cylinders though .
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Offline kghost

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Re: RD250E
« Reply #9 on: June 12, 2013, 02:38:48 PM »
Bring back the smokers
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Offline grcamna2

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Re: RD250E
« Reply #10 on: June 12, 2013, 04:01:36 PM »
Quote from: simon#42 on June 12, 2013, 10:41:42 AM
Quote from: LesterPiglet on June 10, 2013, 04:00:52 PM
Just get the 400....

yes that is the answer , the 400 cases and crank are different and you cant put the 400 crank in the 250 . you can fit the earlier 350 cylinders though .

I'd like to ride it w/ the RD350 cylinders. It's a NICE bike just as it sits though;Bodd did an Excellent restoration on that one !  :)
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline LesterPiglet

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Re: RD250E
« Reply #11 on: June 12, 2013, 04:21:52 PM »
The 400 is exactly the same as the 250 as far as I know. Same frame etc..
I'm not a fan of Yams in general but I rode a turquoise 400 for a few months and loved it to bits.
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'Then' and 'than' are completely different words and have completely different meanings. Same with 'of' and 'have'. Set and sit. There, their and they're. Draw and drawer. Could care less/couldn't care less. Bought/brought FFS.


Les Ross.            Certified by a Professional

Offline Stev-o

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Re: RD250E
« Reply #12 on: June 16, 2013, 08:59:55 PM »
Is this the new RD thread?  Ok, here's my 350....

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Offline Retro Rocket

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Re: RD250E
« Reply #13 on: June 16, 2013, 09:01:52 PM »
Very Nice Steve.. ;)

R5350 was my first road bike..
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Offline Stev-o

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Re: RD250E
« Reply #14 on: June 16, 2013, 09:05:39 PM »
Quote from: Retro Rocket on June 16, 2013, 09:01:52 PM
Very Nice Steve.. ;)

R5350 was my first road bike..

Thx Mick. Bet you wish you still had it?    I don't really understand why I really like this bike, but I do. 
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Retro Rocket

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Re: RD250E
« Reply #15 on: June 16, 2013, 09:21:49 PM »
Mine was Orange Steve, you don't see many these days, small light and pretty quick...
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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Stev-o

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Re: RD250E
« Reply #16 on: June 17, 2013, 05:48:04 AM »
Quote from: Retro Rocket on June 16, 2013, 09:21:49 PM
Mine was Orange Steve, you don't see many these days, small light and pretty quick...

I read somewhere there was a RD350 that did 0-60 in 3.8 secs....
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Offline grcamna2

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Re: RD250E
« Reply #17 on: June 17, 2013, 03:03:14 PM »
Quote from: Stev-o on June 16, 2013, 08:59:55 PM
Is this the new RD thread?  Ok, here's my 350....



That's a Nice 1st year 73' Stev-o !I bought one slightly used from a guy in 1974 who liked shopping our local Dealer for new Yamaha's every time he felt like it along w/ his dad who had a gold TX750.
That was my 1st FAST bike after I got my full license when I turned 17 & I made sure to test the limits of handling on the factory  :o Dunlops.I was reading too many cycle mag road tests.I installed a pair of K81's later & loved'em.
« Last Edit: June 17, 2013, 03:05:41 PM by grcamna2 »
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Stev-o

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Re: RD250E
« Reply #18 on: June 17, 2013, 04:11:43 PM »
Thanks gr.  It needs tires and I plan to put the K81's on there.  The engine side covers are a little beat up, plan to have them powder coated too.  It's a screamer...
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline grcamna2

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Re: RD250E
« Reply #19 on: June 18, 2013, 08:55:14 AM »
Quote from: Stev-o on June 16, 2013, 08:59:55 PM
Is this the new RD thread?  Ok, here's my 350....



Stev-o,
     Did you do a top end job on it yet? or clean out the carbon from the rings,etc. yet ?? If & when you do I know a little trick to the transfer port windows on the stock pistons to give just a little more boost while still running stock Everything else..,& she'll pull to 9500 even w/ stock exhaust W/ safe running using the O.E. oil pump.
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Stev-o

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Re: RD250E
« Reply #20 on: June 18, 2013, 07:31:43 PM »
Quote from: grcamna2 on June 18, 2013, 08:55:14 AM
Quote from: Stev-o on June 16, 2013, 08:59:55 PM
Is this the new RD thread?  Ok, here's my 350....



Stev-o,
     Did you do a top end job on it yet? or clean out the carbon from the rings,etc. yet ?? If & when you do I know a little trick to the transfer port windows on the stock pistons to give just a little more boost while still running stock Everything else..,& she'll pull to 9500 even w/ stock exhaust W/ safe running using the O.E. oil pump.

No, bought it as a non-runner about 8 months ago and got it running in March.
It screams, won't pull the head til she blows!
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline grcamna2

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Re: RD250E
« Reply #21 on: June 19, 2013, 09:51:58 AM »
Stev-o,
    If you use Quality injection oil it'll take a LOT to make it blow !
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75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline Stev-o

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Re: RD250E
« Reply #22 on: June 19, 2013, 05:09:00 PM »
Quote from: grcamna2 on June 19, 2013, 09:51:58 AM
Stev-o,
    If you use Quality injection oil it'll take a LOT to make it blow !

Dare I ask what kind of oil to use?!
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Stev-o

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Re: RD250E
« Reply #23 on: June 19, 2013, 05:12:58 PM »
Had business in Houston today and checked out CL for any possible bargains I could pick up while I was there.

This RD400 caught my eye but didn't have enough spending money on me to pick it up...

http://houston.craigslist.org/mcy/3776379202.html
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline Bodd

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Re: RD250E
« Reply #24 on: June 20, 2013, 12:33:01 AM »
Quote from: Stev-o on June 19, 2013, 05:12:58 PM
Had business in Houston today and checked out CL for any possible bargains I could pick up while I was there.

This RD400 caught my eye but didn't have enough spending money on me to pick it up...

http://houston.craigslist.org/mcy/3776379202.html

Strange advertising it as an RD400 when the only thing RD about it is the frame, I would call it a YDS350 cafe racer, nice looking bike though.
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