1977 KZ650B Manual Petcock Replacement?

More
19 Aug 2019 17:59 #809506 by mgutjr
Anyone know of a good replacement for this petcock? Ideally a manual petcock. I don't want a vacuum petcock.

I've rebuilt it the current one. Replaced the O-rings and it still leaks. I just need a new one.

Thoughts?

Please Log in or Create an account to join the conversation.

More
20 Aug 2019 10:11 - 20 Aug 2019 10:25 #809555 by martin_csr
Replied by martin_csr on topic 1977 KZ650B Manual Petcock Replacement?
Your bolt-hole spacing should be 44mm center-to-center. Someone on another forum put an oem Yamaha Raptor manual fuel valve on his Zephyr 550 & I think the Zephyr is 44mm. not 100% sure, though. The Yamaha fuel cocks vary in shape & the way they fit under the tank >> some of them are squat & would be tucked tight against the tank, while others hang down more.

The Yamaha Raptor fuel cocks are made in Japan & affordable. Be sure to verify the bolt-hole spacing beforehand.
note: some of the Yamaha fuel valves are 34mm.
...
Last edit: 20 Aug 2019 10:25 by martin_csr.
The following user(s) said Thank You: mgutjr

Please Log in or Create an account to join the conversation.

More
09 Sep 2019 13:06 #810591 by Schultzboy
Replied by Schultzboy on topic 1977 KZ650B Manual Petcock Replacement?
I'm in the same boat here. I did manage to get mine apart, cleaned all the gunk out, etc. It doesn't leak, but man is it hard to turn. Not a great design.

I spoke to someone at Mikes XS (which I guess is related to Z1) and he said that this petcock has a 46mm bolt center when ours is 44mm.

www.mikesxs.net/yamaha-xs650-petcock-non...447-24500-02-00.html

I'm thinking that some gentle drilling of the mounting holes will make it easy to bolt this up on our bikes.

Please Log in or Create an account to join the conversation.

More
09 Sep 2019 14:53 #810600 by davido
Replied by davido on topic 1977 KZ650B Manual Petcock Replacement?
I want to do the same thing. Let me know how you solve it.
( Im using an inline tap between the petcock and the carbs. Not ideal but it works for now)

www.kzrider.com/forum/11-projects/594313-csr1000-project-build
CB550 (1978)
CB500/4 (1972)*
KZ1000CSR (1981)
XT 600E (1999)
TDM900 (2003)

Please Log in or Create an account to join the conversation.

More
09 Sep 2019 17:39 - 09 Sep 2019 17:40 #810608 by Nessism
Replied by Nessism on topic 1977 KZ650B Manual Petcock Replacement?
On the OEM parts fishe they list two petcocks for the 650B; an early version and later type. The later type looks identical to the petcock on my 750, which I was able to successfully rebuild with OEM parts. I wouldn't attempt a rebuild unless OEM parts are available, and there doesn't seem to be any of the early petcock rebuild parts anymore. At any rate, just sharing my experiences.

[img
P1010520 by nessism , on Flickr
Last edit: 09 Sep 2019 17:40 by Nessism.

Please Log in or Create an account to join the conversation.

More
09 Sep 2019 20:12 #810614 by mgutjr
Replied by mgutjr on topic 1977 KZ650B Manual Petcock Replacement?
I ended up buying this plate:

www.z1enterprises.com/pingel-petcock-ada...CsbWeVRoCPz8QAvD_BwE

and used this petcock (bought it on Amazon):
Bikers Choice Early Style Petcock 011409

I had to dremel the hole on the tank where the petcock enters (not the screw holes), but it all fit perfectly and i haven't had a leak from the gas tank or the carbs since.

Please Log in or Create an account to join the conversation.

Powered by Kunena Forum