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Author Topic: Yamaha rd350 Road Racer Liquid Cooled!!  (Read 37656 times)

Offline Hurco550

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Re: Yamaha rd350 road racer
« Reply #20 on: Jun 24, 2016, 10:57:42 »
Great to know about the crank and side load on the bearings! And the tank.... I had it on the wall so I sat it in there ha.  When the right deal comes along I'll pick up a property tail section and tank. I'll see what mid Ohio has in store
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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 Bennett

Offline VonYinzer

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Re: Yamaha rd350 road racer
« Reply #21 on: Jun 24, 2016, 11:10:44 »
Great to know about the crank and side load on the bearings! And the tank.... I had it on the wall so I sat it in there ha.  When the right deal comes along I'll pick up a property tail section and tank. I'll see what mid Ohio has in store

I have a couple glass race seats on the shelf. Different designs but both vintage "cafe racer" style. I'll get you some pics when I get back into town Monday if you're interested.
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline Shoeman

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    • My old RD tuning pages from the 90's
Re: Yamaha rd350 road racer
« Reply #22 on: Jun 24, 2016, 11:22:28 »
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.
All true.  I used to use Tz bearings everywhere but the primary side.  Makes for a strong crank but overkill for street use. 
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 #23 on: Jun 24, 2016, 11:51:59 »
I have a couple glass race seats on the shelf. Different designs but both vintage "cafe racer" style. I'll get you some pics when I get back into town Monday if you're interested.
Sure thing man, that would be great!
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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 Bennett

Offline clem

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Re: Yamaha rd350 road racer
« Reply #24 on: Jun 25, 2016, 00:38:31 »
Some people hate the Vito cranks and some dig them. I read about a guy that put a couple thousand miles on one and said it was still fine. Another put a couple hundred and said the vibration was picking up. I had Mr. Garland rebuild my crank and he did an excellent job. Yeah I've missed a few shifts that went past 10k and I try to ring its neck now and again and it still feels solid.

Sent from my SAMSUNG-SM-G920A using DO THE TON mobile app

"After every war there are soldiers who refuse to surrender. To this day there are still thousands who cling to their 30+ year old motorcycles, thinking that the war is still on, refusing to concede that the four-strokes have won"

1972 DS7 http://www.dotheton.com/forum/index.php?topic=45886.msg505995#msg505995
1983 CB550sc bobber http://www.dotheton.com/forum/index.php?topic=30599.30

Offline teazer

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Re: Yamaha rd350 road racer
« Reply #25 on: Jun 25, 2016, 02:22:51 »
We shift at 10,500 on a 350 with heavy pistons and a little more on a 250 and cranks last as long as they have the right rods and we don't hydro lock motors and try to start them on rollers - that bends rods which then rub on crank wheels until they get hot enough to snap.  Not a pretty sight.

Lynn Garland is an all round good guy and very experienced builder of Yamaha twins.
« Last Edit: Jun 25, 2016, 02:24:32 by teazer »

Offline Shoeman

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Re: Yamaha rd350 road racer
« Reply #26 on: Jun 25, 2016, 08:45:24 »
Lynn Garland is an all round good guy and very experienced builder of Yamaha twins.
Yes indeed.  We used to share garage space at NHIS during USCRA races.  A very distinguished gentleman with a fine collection of Yam race bikes.   An added bonus was the fact that he is friends with Kevin Cameron, who would stop by and visit our pit on occasion.  Man, those were the days. 
I like cilp-ons, clubman's and superbike bars depending on the bike.  And rear-sets.

Online Sav0r

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Re: Yamaha rd350 road racer
« Reply #27 on: Jun 25, 2016, 14:22:22 »
I have a Vito's in my RD now. Seems fine but I don't have a lot of miles on it quite yet. I'll rebuild my OEM crank in the offseason with the hope of eventually having a complete seciond engine eventually. For the price of the Vito's though it really can't be beat in my opionion. Especially as a drop in unit, and there is something awfully nice about it just showing up and dropping it in. That said, if I were going racing where I'd be expecting to run flat out in the upper 20% of the RPM range all of the time I think I'd stick with a well serviced OEM unit.
Sav0r the adventure.

Visit www.chrislivengood.net to get more information on my RD350 dubbed Mia Wallace as well as my other projects and snafus.

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Offline alzcbz

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Re: Yamaha rd350 road racer
« Reply #28 on: Jun 25, 2016, 17:18:23 »
Vito's does a lot of Blaster and Banshee mods. RD350 mods are common for the Banshees. Very reputable, never heard bad about their products, not to mention they are somewhat local to me.
73 CL350 Hardtail somethin turned into café
99 ZRX1100-Green
73 CB350G-Sold
89 Hawk GT Race bike-Sold
89 TRX250R-Sold

Offline Hurco550

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Re: Yamaha rd350 road racer
« Reply #29 on: Jun 27, 2016, 12:13:23 »
Thanks for the replies on the crank. There is currently a nos crank that I'm trying to get my paws on, if not I'll probably try to grab one of those new vitos. I'm also on the prowl for an electronic ignition. Trying to decide if I should go with the full setup with stator, coils and all ($$) or just one to delete the points. For now, until I get some scratch to really build the motor, I'm gonna try to get the chassis straight. Nothing special for now. Trying to track some aluminum hoops to lace on, tapered neck bearings fork seals ect... should also probably track down some rear socks as well. Also gonna work to make the proper mounts for the fairing.

I'm not planning to build this motor to the ragged edge on tuning, but I have read that there is plenty of unlocked power in these things with some tuning,so we shall see where she ends up. Planning to grab an fzr rotor from vonyinzer to fit to the front and help with the whoa as well.
"If you just picked up a drug habbit instead of a kawasaki triple at least you could get high while you waste money"
~ bradj

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
1973 Ironhead Hardtail: http://www.dotheton.com/forum/index.php?topic=68135.msg788081#msg788081
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 Bennett