4 STROKE FOR A RD 350

S

SNMRAD

New Member
I HAVE A 1975 RD350 THAT I WOULD LIKE TO CHANGE OVER TO A 4 STROKE MOTOR. MY QUESTION IS : IS THERE A YAMAHA 4 STOKE THAT WILL BOLT ON. I KNOW MOST 2 STROKERS WILL THINK THAT I AM CRAZY BUT THE BIKE IS A LITTLE TO SMOKY AND LOUD FOR MY TASTE BUT I LOVE THE LOOK.

THANKS FOR YOUR HELP.
 
That frame is fairly low and there are not many 4 stroke motors that would work there. Maybe a JDM FZR250 4 cylinder.
 
Thats absolutly insane... Sorry, but it is.

Just sell the RD, and buy a 4 stroke. I am BEGGING you to PLEASE NOT cut that RD up to shove a different motor in there. They are getting harder to find now-a-days, and although Im certainly not a proponent for stock motorcycles, this plan will just ruin a beautiful machine.





And on top of that, BradJ may find and assasinate you if you go through with it. Haha... ;)
 
I think your just testing the water with this but im pretty sure there is a vespa in the for sale section if ya decide to come completely out of the closet.

DONT HIDE YOUR PRIDE SWEETS, FOLLOW YOUR HEART!
 
There is different oils that dont smoke as bad or madie your oil pump is out of adjustment or madie just repack you stock mufflers to shut them up
 
I couldn't agree more... Please please please don't hack it up. There are load of good synthetic oils that don't smoke much, especially if the motor is tight, right, and tuned correctly. Two strokes are not for everyone, so if you really can't live with it, please find it a new home where it will be loved, respected, and revered as it is. There are loads...LOADS of four stroke twins in the world, but only a precious few rd's anymore. As mentioned, it doesn't have to be stock, but please respect it.
 
Noise is avoidable - fit decent mufflers from TZMike. Smoke is also pretty much a thing of the past with modern oils. I have an RZ350 and it smokes when I fire it up, but there's no noticeable smoke once it's warm.

Excessive smoke is usually cheap old oil or a bike that has not been run hard and the pipes are full of oil. That will subside when it's run hard enough to get the pipes nice and hot (doesn't need to be crazy hard though).
 
SNMRAD said:
MY QUESTION IS : IS THERE A YAMAHA 4 STOKE THAT WILL BOLT ON.
Click to expand...

NO. THERE IS NO 4 STOKE THAT WILL BOLT ON.

There's your answer. Sell the bike and find something more to your liking.
 
I mean, I'll trade you for a 75 cb360t if you want a 4 stroke....I'd love to have a rd350 :D

Where are you located? haha
 
RocketMonkey28 said:
There are load of good synthetic oils that don't smoke much, especially if the motor is tight, right, and tuned correctly.
Click to expand...

I was quite surprised when I bought a new Chinese 2 stroke line trimmer and used the recommended synthetic oil in it - no smoke whatsoever. I had to double check I got the pre-mix right, but it was and it's amazingly smoke free.
 
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