
The R5 carbs use the 5DP7 needle and the corresponding emulsion tube.. [used in the dave- F mods for RD carbs]
This is the only difference. You can use them on RD crankcases with absolutely no problems. The good part about the R5 cylinders is that they can be used for a good high revving setup as there is no reed valve which is an obvious restriction compared to the piston port the R5 uses. Reccomended on a drag bike setup


. This is one of the info i got from the net (another froum). and thanks for updating me on that.

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