Author Topic: Cheap 836 kits back on ebay...$110! *Update!  (Read 110068 times)

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Offline bert96

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Re: Cheap 836 kits back on ebay...$110!
« Reply #25 on: May 29, 2011, 12:36:46 PM »


I could not resist any longer....i bought a kit ::) ;D


Bert
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Offline That 70s Bike

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Re: Cheap 836 kits back on ebay...$110!
« Reply #26 on: May 31, 2011, 08:26:19 PM »
Hey all!
I'm considering one of these for the shelf as my 750k6 is fine as is. Just wondering once installed, from then on where do you get a 836 sized head gasket if needed  or rings? Are these rings specific to these pistons? I know in the 2 stroke world you have to be very careful with rings & pistons from different manufacturers (poss. the lands are different) I don't want to buy 2 kits!
Maybe leave my original cyls stock, instead bore out a spare cylinder set from epaY?

Bert ...I cannot resist your avatar any longer :'(
« Last Edit: May 31, 2011, 08:31:51 PM by That 70s Bike »
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Re: Cheap 836 kits back on ebay...$110!
« Reply #27 on: June 01, 2011, 03:08:52 AM »
He also lists head gaskets and rings separately...very cheap.
Steve

Offline jacquesleclochard

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Re: Cheap 836 kits back on ebay...$110!
« Reply #28 on: June 01, 2011, 06:21:30 AM »
Good lord, here they are again! I'm trying to get a combined shipping to the Netherlands, if he agrees, I'm in! So excited; my new engine rebuild is really coming together nicely!

Offline jneuf

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Re: Cheap 836 kits back on ebay...$110! *Update - Pistons have arrived!
« Reply #29 on: June 01, 2011, 10:45:02 AM »
Shipping was a heck of a lot quicker than I expected it to be...got to my door yesterday, but I missed the mailman so I picked up the package at lunch today. I honestly wasn't expecting it for another couple of weeks...Shipping from Japan to me here in Winnipeg was a week.

Anyway, packaging was great...Seller did a really good job there. I'm on my lunch now, so I quickly unpacked them and weighed each piston...each one came in at 175 grams...I measured one piston with pin, clip, and rings and it came in at 230 grams.

*I should mention that my scale DOES NOT measure a tenth or hundredth of a gram...I'll get them on a proper scale for that...I was just curious as to what the approximate weight was *
Does anyone have the weights of other 836 kits? Just curious to compare...

I have some pictures that I can post if anyone wants to see them.
« Last Edit: June 01, 2011, 12:36:54 PM by jneuf »
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Offline joe29

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Re: Cheap 836 kits back on ebay...$110! *Update - Pistons have arrived!
« Reply #30 on: June 01, 2011, 10:59:43 AM »
I have some pictures that I can post if anyone wants to see them.

I'd like to see some pics.... thanks!
-joe

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Offline jneuf

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #31 on: June 01, 2011, 11:11:23 AM »
Here are some pictures...I didn't have time to actually look at them closely, as I was rushed over lunch.

But I could probably take some more detailed pics later on if someone needs.

« Last Edit: June 01, 2011, 12:37:16 PM by jneuf »
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Offline jessezm

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #32 on: June 01, 2011, 11:18:44 AM »
Thanks for the testimonial...Any other changes to the 400f other than the 466 kit? Notice any big power improvements? I'm thinking about ordering a set right now as well and just putting them on the shelf until I rebuild my 400f engine.

I've got the 466 kit in my bike as well, and am also running a mild Webcam.  while I really have nothing to compare it to since I didn't really ride the bike before the install, I will say that I'm totally pleased and impressed with the power now.  I'm sure that making improvements in the breathing (headers, oversized valves, boring carbs, etc) would also go a long way toward taking advantage of the extra displacement, but I'm happy with what I've got at the moment. 


Offline HondaMan

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #33 on: June 01, 2011, 06:19:13 PM »
Here are some pictures...I didn't have time to actually look at them closely, as I was rushed over lunch.

But I could probably take some more detailed pics later on if someone needs.



Jneuf:
Do those pistons have the micro-grooved skirt finish on them? They did not when I last bought a set of them.
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

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Offline jneuf

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #34 on: June 01, 2011, 07:33:46 PM »
Here are some pictures...I didn't have time to actually look at them closely, as I was rushed over lunch.

But I could probably take some more detailed pics later on if someone needs.



Jneuf:
Do those pistons have the micro-grooved skirt finish on them? They did not when I last bought a set of them.

Good question...I hadn't actually thought to look. I cracked open the box and took another more detailed pic for you. There is a micro-grooved finish on the skirt...I understand this provides better lubrication and better wear resistance..?
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Offline scottly

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #35 on: June 01, 2011, 07:38:10 PM »
I would like to see a pic or two of the underside of the piston. They look very nice, BTW.
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Offline jneuf

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #36 on: June 01, 2011, 07:40:23 PM »
I would like to see a pic or two of the underside of the piston. They look very nice, BTW.

Give me a couple minutes...I'll go snap a couple pics for you.
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Offline jneuf

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #37 on: June 01, 2011, 08:47:20 PM »
As requested...
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Offline 754

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #38 on: June 01, 2011, 08:52:49 PM »
They are low compression Correct ??..or shall I say stock compression..
 That part I dont like, just saying, be better performance with a higher dome of you are running hotter cam..
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Offline jneuf

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #39 on: June 01, 2011, 09:13:24 PM »
It's my impression that they are stock compression...

I agree though, a higher compression piston would be nice.
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Offline scottly

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #40 on: June 01, 2011, 09:23:17 PM »
They look like nice pistons regardless of the lower compression...
Don't fix it if it ain't broke!
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Offline HondaMan

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #41 on: June 01, 2011, 10:24:58 PM »
Yep, those have micro-grooves. Very nice! Make sure your machine shop sets the clearance between 0.0008" and 0.0012" when you use those, as the grooves will break in and add up to 0.0004" more on the skirts. Too much clearance invites poor skirt-to-oil-to-bore contact, and these pistons can then get too hot. With cast forged pistons, like the Wiseco, they are different alloys and need more clearance (0.0020") for other reasons, so don't confuse these with those.

Remember, too, that increasing the bore size while retaining the stock chamber size also raises the compression ratio quite a bit. These should work out at between 9.25:1 and 9.4:1, depending on whether you add a quench band to the head or not.
« Last Edit: June 02, 2011, 02:46:56 PM by HondaMan »
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
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Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

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Offline 754

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #42 on: June 02, 2011, 08:09:59 AM »
Did you mean FORGED piston like a Wiseco.??, in the previous post Hondaman?
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Offline climbingaz

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #43 on: June 02, 2011, 10:43:06 AM »
They look like nice pistons regardless of the lower compression...

Hey Scott,

Can you recommend a shop here locally when I'm ready to do the rebuild?

Offline jaguar

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #44 on: June 02, 2011, 12:56:59 PM »
how are the castings?
any exclusions?


Offline scottly

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #45 on: June 02, 2011, 02:43:18 PM »

Hey Scott,

Can you recommend a shop here locally when I'm ready to do the rebuild?

Sorry, I can't help. You might ask shenanigans?
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Offline HondaMan

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #46 on: June 02, 2011, 02:45:19 PM »
Did you mean FORGED piston like a Wiseco.??, in the previous post Hondaman?

Oops, yeah. I keep calling them cast. Like the other ones are GROWN, or something? Duh...
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com

Offline bert96

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #47 on: June 02, 2011, 04:38:10 PM »
I installed a set on a gently-used bike last year. I think it has about 500 miles on it now. Be sure to use the clearance of 0.0010" to 0.0012" wit those pistons, as they do not have the micro-groove skirts like some 836 kits.

If nothing else is done but boring and installing these type of 836 pistons, the typical HP increase is about 8. If you follow all the steps in my book, like valve work, port work, quench band, spark curve change, and final carb tuning with stock airbox (NOT pods), you can get 12 HP from the installation. If you also add a mild cam like the K0 cam, this can add 2 HP more to that figure. If you go much further than that, like a Webcam 41 or something, you might wish to consider stronger rods as you nudge toward 80 HP. MRieck can install larger intake valves for you, too, which can push it to a 90 HP and require that you think about something other than a stock spoked rear wheel.  ;)

If i find a cam,how can i be sure it's from a K0?

Bert
QA50 1969,ST-90 1974,mb5 1982,rz350 1983,shadow 1100 1985,vf1000f 1985,BMW K1 1990,shadow tourer 1100 2001,vfr 750 1994,vtr250 199?

Offline finkbuilt

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Re: Cheap 836 kits back on ebay...$110!
« Reply #48 on: June 02, 2011, 05:18:47 PM »
I purchased his carb rebuild kits.  They worked out great and a set of 4 were $44.

I would order from him again.

That's good to hear, because I am in the process of installing a set of carb rebuild kits from this seller in my 350F right now, but the jets in the kit that I got were not marked with size, so I was a little apprehensive about installing them. They appear to be the right size, but I dont have any way to measure for certain.
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Offline climbingaz

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Re: Cheap 836 kits back on ebay...$110! *Update!
« Reply #49 on: June 02, 2011, 07:28:00 PM »
Just got mine today in the mail!  Didn't take very long at all...like a week.  ;D