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Author Topic: Yamaha rd350 Road Racer Liquid Cooled!!  (Read 39857 times)

Offline JustinLonghorn

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Re: Yamaha rd350 road racer
« Reply #10 on: Jun 23, 2016, 11:59:14 »
Dig it.
I'm going to eat your brains and gain your knowledge.

Into The Sunset, CB750 build

TT500 the Animal

Offline Hurco550

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Re: Yamaha rd350 road racer
« Reply #11 on: Jun 23, 2016, 17:58:34 »
For better driveability, use the RD cylinders over the piston-port R5.  The reed valves make for a much more enjoyable experience.  Teazer is correct on the 400 trans too.  Closer ratios in the top gears.  Are those Bassani pipes?
And I can't find any markings on the pipes, but the guy I got them from said they are just dg's
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline Shoeman

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Re: Yamaha rd350 road racer
« Reply #12 on: Jun 23, 2016, 18:55:21 »
I'm thinking they're not DG.  DG have a single stage diffuser, and yours have a two stage.  Much better.     
I like cilp-ons, clubman's and superbike bars depending on the bike.  And rear-sets.

Offline Hurco550

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Re: Yamaha rd350 road racer
« Reply #13 on: Jun 24, 2016, 01:52:04 »
Started pulling down the r5 motor to see what I'm working with. Got one side freed up without much fuss, the other side isn't being quite so easy. If my concoction doesn't work, I'll grab some atf and acetone tomorrow, 70% of the time, it works every time. I won't know until it gets torn clear down if it needs a full crank rebuild, but odds are it will. I found this online, and I doubt you can rebuild one for the price of this new. That said, I think the country of origin is Taiwan, and I cannot find any user reviews. $400 for a new crank almost seems to cheap in a way.
https://www.vitosperformance.com/atv_parts/product.php?productid=11577&cat=0&page=&featured=Y

I'm going to tear the rd350 motor down as well to see where I stand on the two, but the top end is stuck on it as well.

While I wait for funds to build a motor, I will try to mount the fairing, sort the tank and seat, and figure the chassis work. I think a cb500t tank will fit the bill, but I can't bring myself to strip the paint off this tank, it's just to nice. Anyhow, just a mockup, so don't bind your panties ;)
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj
1988 tw200, the swamp donkey: http://www.dotheton.com/forum/index.php?topic=75455.0
2006 Suzuki DR650 Adventure monowheel trailer build: http://www.dotheton.com/forum/index.php?topic=75033.0
1976 BMW R90/6 farkilitious: http://www.dotheton.com/forum/index.php?topic=74349.msg882477#msg882477
1975 RD350 Road Racer: http://www.dotheton.com/forum/index.php?topic=70652.msg833688#msg833688
1976 GT250 Rebuild: http://www.dotheton.com/forum/index.php?topic=64973.new#new
Full Custom Pit Bike: http://www.dotheton.com/forum/index.php?topic=66954.new#new
1971 Yamaha 90cc twin HS1: http://www.dotheton.com/forum/index.php?topic=70498.0
"much ingenuity with a little money is more profitable and amusing than much money without ingenuity" - Arnold Bennet

Offline Shoeman

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Re: Yamaha rd350 road racer
« Reply #14 on: Jun 24, 2016, 07:22:26 »
$400 is cheap for sure.  I had not looked at Vitos website in many years, since I sold my last RZ.  He's expanded his product line quite a bit.  Hard to say no at that price.  I'd find out about the return policy and if allowed, I'd get one, measure it to make sure it meets Yam spec on all dimensions before using it.  Good calipers, some v-blocks and dial indicator(s) is all you need.
  I see he sells a racing version too (TR) that uses the TZ style roller bearing on the primary end but does not have the lightening holes of the true race cranks, for more money.  Not worth the extra $$ for a street bike though.
I like cilp-ons, clubman's and superbike bars depending on the bike.  And rear-sets.

Offline advCo

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Re: Yamaha rd350 road racer
« Reply #15 on: Jun 24, 2016, 07:47:26 »
Rad. That fairing is sweet. I'm in.


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74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0 - Sold
82 GS550L - Tracker-ish - http://www.dotheton.com/forum/index.php?topic=67229.0 - Sold
74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0 - Sold
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
73 Suzuki RV125 -http://www.dotheton.com/forum/index.php?topic=73875.0
'97 BMW F650st - http://www.dotheton.com/forum/index.php?topic=75732.0

Offline Ryan Stecken

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Re: Yamaha rd350 road racer
« Reply #16 on: Jun 24, 2016, 10:08:32 »
Did i really miss this?epic!

Offline teazer

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Re: Yamaha rd350 road racer
« Reply #17 on: Jun 24, 2016, 10:41:50 »
....................
  I see he sells a racing version too (TR) that uses the TZ style roller bearing on the primary end but does not have the lightening holes of the true race cranks, for more money.  Not worth the extra $$ for a street bike though.

TZ outer main bearings are much better than the street bearings but cannot be used on a crank with helical primary gears.  They must be straight cut to use them because unlike balls, they can't take the side loads.  So TZ cranks for bikes with straight cut primaries and dry clutch and regular bearings for street bikes with helical gears and wet clutch.

Offline teazer

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Re: Yamaha rd350 road racer
« Reply #18 on: Jun 24, 2016, 10:43:11 »
I know we all have a different sense of style, but please remove that tank and put it on something fat and heavy - like say a Honda.... :-) 

Offline Ryan Stecken

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Re: Yamaha rd350 road racer
« Reply #19 on: Jun 24, 2016, 10:53:35 »
I know we all have a different sense of style, but please remove that tank and put it on something fat and heavy - like say a Honda.... :-)

+1.....that got me a good laughing fit.