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Author Topic: Yamaha rd350 Road Racer Liquid Cooled!!  (Read 40833 times)

Offline Hurco550

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Re: Yamaha rd350 road racer
« Reply #60 on: Jul 17, 2016, 18:53:55 »
Have any of you guys used the banshee pistons in an r5 top end vs an rd350 top end? I can't imagine there would be an issue doing so, but I figured I'd ask
"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 davedogg

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Re: Yamaha rd350 road racer
« Reply #61 on: Jul 17, 2016, 19:04:02 »
Pretty sure you cannot use banshee pistons on a R5. The R5 is piston port and doesn't have the windows that the reed valve RD and banshees have.

Offline Hurco550

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Re: Yamaha rd350 road racer
« Reply #62 on: Jul 17, 2016, 20:13:37 »
Pretty sure you cannot use banshee pistons on a R5. The R5 is piston port and doesn't have the windows that the reed valve RD and banshees have.
Well dang. Thanks for the info though man
"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 Redbird

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Re: Yamaha rd350 road racer
« Reply #63 on: Jul 17, 2016, 20:13:45 »
That's my understanding as well.
When you are Dead, you don't know that you are Dead. It is difficult only for Others.

It is the same when you are Stupid.

Offline Hurco550

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Re: Yamaha rd350 road racer
« Reply #64 on: Jul 17, 2016, 20:14:55 »
Maybe I should build an Rd top end after all then, but teazer has already been putting a bunch of time into r5 port maps for me though
"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 clem

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Re: Yamaha rd350 road racer
« Reply #65 on: Jul 17, 2016, 22:01:51 »
The Banshee pistons do work in the RD350 but they need to be modified.  Good quality R5 pistons may be hard to find. I think that Wossner may be the best bet.

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 Hurco550

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Re: Yamaha rd350 road racer
« Reply #66 on: Jul 17, 2016, 22:17:53 »
The Banshee pistons do work in the RD350 but they need to be modified.  Good quality R5 pistons may be hard to find. I think that Wossner may be the best bet.

Sent from my SAMSUNG-SM-G920A using DO THE TON mobile app
I did read about filing of the tab on the intake side for the rd's,  I just assumed it would be the same for the r5,but it seems like that is not the case
"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 Hurco550

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Re: Yamaha rd350 road racer
« Reply #67 on: Jul 18, 2016, 02:40:19 »


Good quality R5 pistons may be hard to find. I think that Wossner may be the best bet.

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

Wossner pistons are about $130 a pop. Seems steep to me, but maybe that's the going rate for a quality piston these days
"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 Ryan Stecken

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Re: Yamaha rd350 road racer
« Reply #68 on: Jul 18, 2016, 09:52:18 »
This was one of the reaons i didnt buy a R5 cuz the pistons are really hard to get in Europe...I used on both of my RD stages (Stock 250 setup and modified 350) the pistons (Pro-X pistons) of the watercooled LC 350 (250)...they worked fine on the 250 and the 350 setup.
I still got my RD 250 jugs and pistons in my shelf, so if youre planning to go for that, let me know (shipping might be expensive from austria).

I also thought about going for Wossners but I went for Pro-X in the end, a friend explained to me that going for A to B in the city is not right thing for them (forged steel needs more time to warm up and i think its bored the lower play).
« Last Edit: Jul 18, 2016, 09:58:34 by Ryan Stecken »

Offline Shoeman

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Re: Yamaha rd350 road racer
« Reply #69 on: Jul 18, 2016, 09:54:52 »
Maybe I should build an Rd top end after all then, but teazer has already been putting a bunch of time into r5 port maps for me though
Is he porting a set for you or just drawing port diagrams?   Here's basic RD setup for street use:   Raise exh port 1mm, widen it 2mm.   Widen the intake 2mm and remove the lip at the cylinder on the port floor.  Make sure both cylinders match when you're done. Leave the transfers alone unless you have a right angle hand piece.  Match the case top to the cylinder base if you like.   Cut the center tab off banshee Pistons as you already know bolt it back together and let it rip.
I like cilp-ons, clubman's and superbike bars depending on the bike.  And rear-sets.