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Author Topic: KX500B1 replacement carb?  (Read 1201 times)

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Offline VMXSteve

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KX500B1 replacement carb?
« on: December 18, 2013, 03:45:22 pm »
I have a 1985 KX500B1 with an old original Mikuni VM40 carb that I would like to replace / upgrade due to jetting issues.   Jets / Needles are almost impossible to get and I have had great success with the JD Jetting Red needle on my RM250K8.

I can get a new Keihen PWK 38 Airstriker carb with JD Jetting needles etc from the States, but are unsure if it's a straight bolt on solution?   Or do I need air box adapters etc....

Anyone tried this on a KX500?

Thanks Steve
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YZ250J, KX500B1, XR600RJ, RM250K8, LTZ250K9, DR650SEK9, GSX1400Z, TTR125, GPX250RII, TSX125, TTR50, LTZ50

Offline Nathan S

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Re: KX500B1 replacement carb?
« Reply #1 on: December 18, 2013, 04:32:10 pm »
FWIW, I put an old round slide Mikuni into a 95 YZ250 (that originally had a 38PWK).
Can't recall how good the fit was (stretched boots, etc) but it definitely went in without the need for adaptor rings, etc.
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Offline Stevo17

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Re: KX500B1 replacement carb?
« Reply #2 on: December 18, 2013, 05:28:26 pm »
You could try a Mikuni TM38-86 Flat slide that should bolt straight on.  Jetting would be as stock on the 84 KX500.
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Offline Ted

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Re: KX500B1 replacement carb?
« Reply #3 on: December 18, 2013, 08:16:08 pm »
That's what I've got
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