Author Topic: Damage control dirty petcock (Read 4736 times)

jebon · « **on:** July 07, 2015, 03:02:37 PM »

I wanted to clean out some rust in my K2 tank. PO had had it sitting both empty, half empty etc. I threw in a bunch of bolts, screws, washers and nuts and gave it a good shake with a small amount of fuel in it as well. I finnished off by pouring out some very red/brown fuel along with all the metal and gave it 3-4 rinses with new fuel before putting it back on the bike and starting it up. It did not run as smooth as before (3-4 short starts) and know I realize because I left the petcock on the tank during the procedure, it must have some of all that rusty goo in it. I drained 3 carbs to inspect and took pictures. Couldn't get the last one opened. What is your verdict? Am I OK with cleaning the petcock or will I need to clean the carbs to get back to normal? Chances are if I take the carbs apart, I'll have a really hard time getting adjusted.

jebon · « **Reply #1 on:** July 07, 2015, 03:26:41 PM »

Yes, from the screws. Sorry, couldn't resist that subject

jebon · « **Reply #2 on:** July 07, 2015, 03:30:58 PM »

Btw, I know I should have taken a picture of the fuel line routing. I'm pretty sure I got it rigth but uncertain which tube goes on which nipple. I put the left line on the rear and the right on the front. Does it matter? Petcock is on the right side.

dusterdude · « **Reply #3 on:** July 07, 2015, 04:06:11 PM »

Doesnt matter what hose goes where

jebon · « **Reply #4 on:** July 07, 2015, 04:11:16 PM »

Quote from: dusterdude on July 07, 2015, 04:06:11 PM

Doesnt matter what hose goes where

Thanks

dusterdude · « **Reply #5 on:** July 07, 2015, 04:13:56 PM »

Welcome

jebon · « **Reply #6 on:** July 08, 2015, 01:55:32 PM »

I drained and cleaned the bowls. They had a little rust in them. Next I'll empty the tank again and clean the petcock. My drain screw washers are done. They don't look like regular o-rings. Does anyone know if It's ok to use o-rings or where I can get such a part?

flybox1 · « **Reply #7 on:** July 08, 2015, 02:39:51 PM »

how good is your in tank filter after you beat it up with the screws and such?

jebon · « **Reply #8 on:** July 08, 2015, 02:42:14 PM »

I'm checking it tomorrow. The K2 doesn't seem to have an outside filter on the tube

flybox1 · « **Reply #9 on:** July 08, 2015, 02:45:26 PM »

OK, then check the bowl on the petcock. there's a screen in there.
Clean it and make sure its not damaged allowing debris through.

mpgholston · « **Reply #10 on:** July 08, 2015, 02:46:24 PM »

Quote from: jebon on July 08, 2015, 01:55:32 PM

I drained and cleaned the bowls. They had a little rust in them. Next I'll empty the tank again and clean the petcock. My drain screw washers are done. They don't look like regular o-rings. Does anyone know if It's ok to use o-rings or where I can get such a part?

If you're close to a Honda dealer, they should be able to order them. I go to one here in New Orleans that's been able to get everything I've needed so far for my 74 550 including a petcock bowl.

mpgholston · « **Reply #11 on:** July 08, 2015, 03:47:27 PM »

Quote from: jebon on July 07, 2015, 04:11:16 PM

Quote from: dusterdude on July 07, 2015, 04:06:11 PM
Doesnt matter what hose goes where
Thanks

Not to get too political, but that would be a great poster for a pride event.

dusterdude · « **Reply #12 on:** July 08, 2015, 04:18:22 PM »

jebon · « **Reply #13 on:** July 09, 2015, 01:41:20 AM »

Quote from: flybox1 on July 08, 2015, 02:45:26 PM

OK, then check the bowl on the petcock. there's a screen in there.
Clean it and make sure its not damaged allowing debris through.

Will do. Thanks

jebon · « **Reply #14 on:** July 09, 2015, 02:32:15 PM »

I got the petcock off and cleaned it. Also got the tank cleaned really well with apple cider vinegar and found out that baking soda is not the same as baking powder

(for neutralizing the acid)

Installed the petcock again and it's leaking of course. I'm thinking I need a rebuild kit. I've found some online but not sure what to get. I installed it without the bowl first so it's leaking either through the screws or the fuel tube hole. I'm thinking I need new washers at least. Do I need some sort of sealant besides the gaskets or should I just be able to install it dry?

flybox1 · « **Reply #15 on:** July 09, 2015, 02:45:37 PM »

Quote from: jebon on July 09, 2015, 02:32:15 PM

I got the petcock off and cleaned it. Also got the tank cleaned really well with apple cider vinegar and found out that baking soda is not the same as baking powder (for neutralizing the acid)

Installed the petcock again and it's leaking of course. I'm thinking I need a rebuild kit. I've found some online but not sure what to get. I installed it without the bowl first so it's leaking either through the screws or the fuel tube hole. I'm thinking I need new washers at least. Do I need some sort of sealant besides the gaskets or should I just be able to install it dry?

install the petcock seals dry. sealant can slough off into your carbs creating more work for you later $:-\$
parts are listed here #4, #6, #9
http://www.cmsnl.com/honda-cb750k2-four-usa_model14362/partslist/F11.html#results

jebon · « **Reply #16 on:** July 09, 2015, 02:50:22 PM »

Does the seal between tank and petcock usually come in a rebuild kit? The ones I've seen doesn't seem to have it

flybox1 · « **Reply #17 on:** July 09, 2015, 02:54:21 PM »

from sites like partzilla.com, just search by the part number listed.
you probably can just get the three seals, and reuse the rest

jebon · « **Reply #18 on:** July 09, 2015, 03:04:55 PM »

Quote from: flybox1 on July 09, 2015, 02:45:37 PM

Quote from: jebon on July 09, 2015, 02:32:15 PM
I got the petcock off and cleaned it. Also got the tank cleaned really well with apple cider vinegar and found out that baking soda is not the same as baking powder (for neutralizing the acid)

Installed the petcock again and it's leaking of course. I'm thinking I need a rebuild kit. I've found some online but not sure what to get. I installed it without the bowl first so it's leaking either through the screws or the fuel tube hole. I'm thinking I need new washers at least. Do I need some sort of sealant besides the gaskets or should I just be able to install it dry?
install the petcock seals dry. sealant can slough off into your carbs creating more work for you later $:-\$
parts are listed here #4, #6, #9
http://www.cmsnl.com/honda-cb750k2-four-usa_model14362/partslist/F11.html#results

Thanks!

mpgholston · « **Reply #19 on:** July 09, 2015, 04:02:47 PM »

Not sure about the price of the petcock kit, but i got the gaskets individually oem for around $20 at a local dealer. If you have one available, you can save time by having them ship it to the store and you'll be able to pick up in a few days.

jebon · « **Reply #20 on:** July 09, 2015, 11:38:22 PM »

I should have taken some before images of the tank. I'm pretty pleased with the result.

jebon · « **Reply #21 on:** July 20, 2015, 07:40:26 AM »

Got everything assembled with a new rebuild kit. All tight. Changed the oil and filled it up with 99 octane. Runs perfectly! I couldn't get the oil filter bolt loose though. The torque spec is lower than the oil bolts so I'm nervous that I'll be in trouble if I get it out. Any experience with that? The bolt started giving when I tried with a socket wrench

ekpent · « **Reply #22 on:** July 21, 2015, 05:51:56 AM »

People put the oil bolts on too tight and also a little corrosion builds up on the large flange head and the filter compartment. If you have the little 12mm head it may get sacrificed removing. Use a quality 6 point socket for starters. They make a 17mm which is better. Worse case when the head gets mangled is to pound a smaller 11mm on the head and keep trying. Good luck, the first removal can sometimes be troublesome.

fitzmotor · « **Reply #23 on:** July 21, 2015, 06:13:22 PM »

Complete petcocks are still available from Honda, I just ordered the one for my K2 today.

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Author Topic: Damage control dirty petcock (Read 4736 times)