Pumper carb for S - also 440 conv

BunduBasher · September 6, 2000

Has anyone fitted a pumper carb to their S yet, and how did the conversion go - is it worth the effort.

Also, has anyone done the 440 (436) thumper converion yet - this sounds like a real winner (as yet, I have not heard of anyone doing this)

Matt_Porritt · September 6, 2000

A pumper carb is the best thing you can do to a 4st that hasn't got one.

Forget the big bores for now.. a Keihin FCR 39mm pumper as the DRZ400 kicker and 'E' has (also the WR/YZ400) or a Mikuni 39mm pumper.

The Mikuni is cheaper and is as good as the Keihin and also doesn't have the probs with the pumper circuit getting dirty.

You'll notice a BIG difference with a pumper on.. more than a 450 big bore kit..

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**Ride it like you Stole it!**

Matt Porritt

99 YZ400F

Discounts for ThumperTalk members.

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