SOHC.co.uk Forums > CB500/550

how to remove carb needle guide on pd46c carb

<< < (3/3)

Brian Cairns:

--- Quote from: Skoti on June 09, 2024, 07:06:06 PM ---Did you fit genuine Honda or aftermarket needle jets kits?

--- End quote ---
They are honda parts, made in Japan sold by  cmsnl.com, correct part numbers.

Skoti:
Was going to suggest the needle profile was incorrect if they'd been aftermarket parts.

BTW
Did your cmsnl ones come in sealed genuine Honda bags?
Because some time ago they supplied me 4 needle jet kits, two in genuine Honda bags and 2 in zip lock bags which were most obviously not genuine.
I challenged them about that and was told they had been repackaged as the original bags were damaged...

Anyhow back to your original problem, do the old needles fit smoothly into the new jets?

Brian Cairns:

--- Quote from: Skoti on June 10, 2024, 06:26:21 AM ---Was going to suggest the needle profile was incorrect if they'd been aftermarket parts.

BTW
Did your cmsnl ones come in sealed genuine Honda bags?
Because some time ago they supplied me 4 needle jet kits, two in genuine Honda bags and 2 in zip lock bags which were most obviously not genuine.
I challenged them about that and was told they had been repackaged as the original bags were damaged...

Anyhow back to your original problem, do the old needles fit smoothly into the new jets?

--- End quote ---
Yes all in original package. The old needles fit into the new jets the same way as the new needles however, old and new needles don’t go through new jets the whole way, they stick 3/4 way , whereas both old and new needles slide into the old jets fully. Thinking of putting old jets back in? However one is damaged.
Cheers
Brian

Skoti:
Need someone to confirm this as your PD carbs are not the same as my F1 carbs.

But my new needles don't pass all the way through the needle jet. (I've got a new set here and just checked that for you.)
It's also probable that your original needle jets are badly worn, (I've just checked old worn ones I've removed and the needles pass all the way through the jets.)

The jets do eventually wear badly and usually become guttered oval because of the needles being sucked back and forth with the induction vacuum as the throttle is opened and closed.

I can easily see the wear difference on my old needle jets by simply holding them up to the light and comparing them with the new ones.


This probably doesn't help you that much but maybe someone else will be along soon that knows about PD carbs.
 

Good luck

Brian Cairns:

--- Quote from: Skoti on June 10, 2024, 08:15:53 AM ---Need someone to confirm this as your PD carbs are not the same as my F1 carbs.

But my new needles don't pass all the way through the needle jet. (I've got a new set here and just checked that for you.)
It's also probable that your original needle jets are badly worn, (I've just checked old worn ones I've removed and the needles pass all the way through the jets.)

The jets do eventually wear badly and usually become guttered oval because of the needles being sucked back and forth with the induction vacuum as the throttle is opened and closed.

I can easily see the wear difference on my old needle jets by simply holding them up to the light and comparing them with the new ones.


This probably doesn't help you that much but maybe someone else will be along soon that knows about PD carbs.
 

Good luck

--- End quote ---

Thanks, only seems to be sticking on carb 3, will remove jet and reseat again to see if that cures it.

Thanks
Brian

Navigation

[0] Message Index

[*] Previous page