Carb needles CB750K2

[AshimotoK0]

Does anyone know if this carb needle reference  is correct for the UK CB750K2, please, 271301 (Keihin)

cheers Ash

[AshimotoK0]

Anyone?

[kettle738]

The only reference I can find to this is a Keyster carb kit.

http://www.nrp-carbs.co.uk/shop/index.php?route=product/product&product_id=483

Which tells you pretty much nothing.....it doesn't seem to even vaguely resemble a Keihin part number.

Honda show 16151-300-004.........same as the k0

You might have to work out a method of manual comparison.

Mick. 

[AshimotoK0]

The reason I am asking is I sold 4 NOS Genuine Honda part needle kits listed for the K0/sandcast on eBay and the guy returned them saying they had the wrong needles put into the bag. They were definitely not messed with but they are listed for the German etc.  market, where incredibly Honda produced a separate part for the HM300 pipes (possibly more restrictive) for the German etc market bikes.. The buyer claimed they were  correct for a K1 but I can't find a reference for them for K1 only for a K2 (same source as you mentioned Mick). The buyer told me has 3 K0's one being a rare early UK one, so sounded like he knows his onions. So I want to list them again for the correct model. I doubt many German K0's have the original pipes but they are probably OK for a K2.  They owe me quite bit so want to sell them.

It was always my belief that the jet needles are parts  that should be the genuine Honda (KeiHin) part but since then lots of aftermarket kits have become available. Any opinions on needles in aftermarket kits?

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[AshimotoK0]

Found these references on the US site from the 750 guru 'Hondaman'

"The K0 and early K1 had #120 jets, which proved too rich, especially if the bikes were run on premium gas and ridden in city traffic. This became #115 by February-March 1971 on the K1 in the 657A carbs (needles still in clip position#3). It then went to 110 on the later K1, and the needles then went to 4th notch from the top in the 657A carbs. The early 657B carbs with the holes in the tips of the idle air screws came with #110 mainjets, clip in position 4, with later "New Factory" K2 bikes usually having #105 mains, regardless of 657A or B series carbs. The 657B carbs with solid-tipped idle air screws had mainjets of #105 size, starting in the K3 sometime. By the K4, the mainjet stayed at #105 size until the 7A carbs mixed in the #110 sometimes: if the needle was the 27201 it had #105 jets, but if 271301, it had #110 mains.
The PD carbs have different numbers, starting in the F1 bikes".

"Hey guys I wonder if you had used the Vinatge CB750 carb rebuils kit.
I got one for my 1976 carbs # 086A
The jet needle seems different slimmer but the same size lengh
Stock # 27201
New # D54"