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Yamaha R5 cylinders on RD350..??
Hey all you guys...just had a doubt..Im working on a RD350 project..and got a pair of cylinders from the states..The cylinders were sold as RD350 cylinders but just after shipment the guy realised that these were R5 cylinders...The Yamaha R5 was the predecessor of the RD350 .the only difference being,the RD has reed valve induction while the R5 was piston port induction...I was told that the R5 cylinders will not work in the RD350....but yesterday again I was told by another RD owner that the R5 cylinders could be used and that they might actually produce more power than the RD cylinders....can that be done..??? can I use a R5 350 cylinder on the RD350..all the tech guru's out there please clear the doubt...appreciate your help..thanks!!
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'68 Jawa 250 ,'76 Yezdi 250, '85 RD350, '88 RD350 , '95 TZR250 3XV, '01 RX 135 5speed, '05 Pulsar 180Dtsi V1
"You live more in five minutes on a bike like this(Indian Scout) going flat out than some people live in their lifetime" - Burt Munro -
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I was surprised when I saw the letters "R5" Never even heard of it before. My bad i guess.
I hope you will get all the info you like dude!10 Commandments:
1)Thank thy God for being alive.
2)Thou shalt respect one's own life and the live's of other road users.
3)Thou shalt respect one's own bike.
4)Love thy bike as thy self.
5)Always wear safety gear.
6)Alcohol is a strict NO!
7)Thou may lust after thy neighbour's bike specially if its of the R1 kind!
8)Thou shalt ride with 'ultra-most' care and caution when on Indian roads.
9)Thou shalt never leave the engine running at long traffic halts.
10)Thou shalt follow all of the above.Comment
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Thanks man..Yeah the R5 was not sold here...it was sold in the US till 1972 as a successor to the DS7 and a predecessor to the RD350...the only difference between the R5 and RD is the Induction type as I said above...!!'68 Jawa 250 ,'76 Yezdi 250, '85 RD350, '88 RD350 , '95 TZR250 3XV, '01 RX 135 5speed, '05 Pulsar 180Dtsi V1
"You live more in five minutes on a bike like this(Indian Scout) going flat out than some people live in their lifetime" - Burt MunroComment
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confusing topic
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Click here to subscribe SMS alerts for all upcoming Xbhp- Hyderabad G2G's and Rides.Comment
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Hmm!Originally posted by prashanth_benz View Post
Give the thread some time bro. I'm sure many of the stroker fans will be here to help out soon.10 Commandments:
1)Thank thy God for being alive.
2)Thou shalt respect one's own life and the live's of other road users.
3)Thou shalt respect one's own bike.
4)Love thy bike as thy self.
5)Always wear safety gear.
6)Alcohol is a strict NO!
7)Thou may lust after thy neighbour's bike specially if its of the R1 kind!
8)Thou shalt ride with 'ultra-most' care and caution when on Indian roads.
9)Thou shalt never leave the engine running at long traffic halts.
10)Thou shalt follow all of the above.Comment
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Yes, the R5 was piston ported.. means had no reed valves, was missing the famous "torque induction"
, [missing the "boost port", i.e the 7th port ] and there were only 5 gears..i believe the carbs were a bit different from the RD ones VM28SC 
[ correct me if im wrong] and the oil lines were different too.. they were plumbed into the intake boot.. not into the carb body
. the bore & stroke were the same 64-54mm though.. but whether they'll fit the Indian RDs or not.. only experts can answer.. Raju sir , its upto you now..
Jawa 250 1970
Rajdoot GTS 1978
Rajdoot 350 1986
RE Classic 500 2011
TVS Victor 2003
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Piston ported engines are things of the past. Reed valve induction is better. I wonder how someone could say that with a piston ported barrel u get more power.
Like Arun said, the famous Boost port will be missing and you'll all the way be missing the true RD essence.
Check if you can swap the Barrels. Try getting the US Spec RD barrels.
Check with Rajkumar himself, he is the man for this.sigpic
[email protected]Comment
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how to get rd barrels from US.
i have my cousin in california, i want to know all the steps involved in getting rd barrels to indiaComment
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R5 = piston port induction. Piston will have no intake holes unlike the reed valve induction
no reed valve hence insane top end coz flow is unrestricted unlike the reed valve system..will make an excellent drag project
finding pistons will be tough if you don't have them already
the bottom end is lame compared to the RD cylinders
you'll need the 5DP7 needle and corresponding primary type emulsion tube too in the VM28 carburetor and the airjet opened 2mm
all the best for your project83' RD350 HT
96' RXG
97' RXZ
91'RX100>09'RX165
2010' HH ZMR
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Jawa 250 1970
Rajdoot GTS 1978
Rajdoot 350 1986
RE Classic 500 2011
TVS Victor 2003
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Pistons are pretty easy to find even on ebay...am still deciding if i should go ahead with this project or sell these cylinders off and get proper RD ones...!!'68 Jawa 250 ,'76 Yezdi 250, '85 RD350, '88 RD350 , '95 TZR250 3XV, '01 RX 135 5speed, '05 Pulsar 180Dtsi V1
"You live more in five minutes on a bike like this(Indian Scout) going flat out than some people live in their lifetime" - Burt MunroComment
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What did you do finally?Comment
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@Above: put the R5 cylinders for sale and got RD cylinders from the USA..:P
'68 Jawa 250 ,'76 Yezdi 250, '85 RD350, '88 RD350 , '95 TZR250 3XV, '01 RX 135 5speed, '05 Pulsar 180Dtsi V1
"You live more in five minutes on a bike like this(Indian Scout) going flat out than some people live in their lifetime" - Burt MunroComment
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