Author Topic: 76 750K this bike will change my life. (Read 68882 times)

climbingaz · « **Reply #25 on:** March 08, 2010, 09:05:47 PM »

Quote from: wannabridin on March 08, 2010, 03:47:59 PM

ya know, they look good and cool, but i want the bike to run well, so the looks can be made up for elsewhere! i'll be running the stock airbox with a K&N and a Carpy 4-1, so i'm thinking 110's would be fine. what'd you run for the slows? also, needle position?

on ya, one other question, any way you could take a closeup of your throttle cables? i mainly need one from the side, because it looks like i'm going to have to fab up a new cable holder. thanks for the help so far!

edit: just got help from bike bandit, looks like the Honda P/N is 16035-393-004 for those that might have some good connections? thanks again guys!!!

I'm sure you'll get varying opinions about the pods, but after George here on the board told me,

"It gets very time consuming and tricky jetting these thing properly with pods. I do it because of my racing, but it is give and take. For all out WOT you lose some low and mid. Mine bubbles and pops a bit off idle, but above 2500-3000 rpm the b1tch is on fire!"

i decided to go back to stock. If I want to scare myself silly, I'll go take my ZRX1200 for ride.

Regarding the slows and needle positoin, I gotta assume whatever I have is stock. The '78k (I'm almost positive) doesn't have adjustable needles.

If you still need a picture of the throttle bracket, let me know.

wannabridin · « **Reply #26 on:** March 09, 2010, 12:50:19 PM »

ya, i'd really like a picture of that missing bracket. i don't know what it's purpose is, but i've seen so many carb sets on ebay and other sites that don't have it and they're going for quite a bit more than what i paid!! so i have no clue if it's even REALLY necessary!!! just a side profile shot of the back side (airbox side) of the carbs please sir!! thank you!!!

climbingaz · « **Reply #27 on:** March 09, 2010, 11:20:45 PM »

Are you talking about this?

wannabridin · « **Reply #28 on:** March 10, 2010, 08:02:54 AM »

no, i have that piece, seeing it mocked up like that makes me realize i was backwards on my orientation. i think that bracket might be a hanger form the frame for the carbs?? because i have that piece you took a picture of. i meant the air box side of the carbs, that piece that is missing from the 4 holes i have in the picture below...

climbingaz · « **Reply #29 on:** March 10, 2010, 12:00:40 PM »

Oh, gotcha. By the way, that bracket that spans across the four carbs holds the chock cable, not the throttle. I sort of assume you could probably get by without it (although I wouldn't want to) if you could some how isolate the choke cable to pull. And believe me, you're gonna want the choke...these suckers are cold-blooded.

wannabridin · « **Reply #30 on:** March 10, 2010, 01:41:57 PM »

well i'm hoping that hondamans ignition helps out with that a lot!! i didn't even get the chock cable with the carbs... blast! i wonder if i can make my cable from the 76K carbs work?? anyone have any idea??

Little_Horse · « **Reply #31 on:** March 11, 2010, 07:29:42 AM »

you could probably rig a lever on the choke shaft so you could get by with out a choke cable at all. On my 500 thats what honda did no cable and a small lever off to the side. You could probably do something similar with hardware store parts.

wannabridin · « **Reply #32 on:** March 11, 2010, 07:55:27 AM »

so just make like a pull tab that i pull out and push in? i like your thinking there! i haven't really taken a look at the choke assembly in too much detail, so i'll have to see what i can concoct...

Little_Horse · « **Reply #33 on:** March 11, 2010, 09:10:12 AM »

it would not need to be very strong either it takes very little pressure to move the choke open and closed.

wannabridin · « **Reply #34 on:** March 11, 2010, 09:18:32 AM »

thanks for that!!! very useful info!! what keeps the choke open and closed if it's setup like this?

Little_Horse · « **Reply #35 on:** March 11, 2010, 03:48:02 PM »

you lol, but seriously you would probably need to reduce the spring tension in it already then make the lever somehow notch into place. My choke has no spring at all it just goes where I put it.

wannabridin · « **Reply #36 on:** March 13, 2010, 04:32:19 PM »

ok, so more cleaning today. i learned that the ultra sonic cleaner's heater function gets HOT!! like steaming hot when it's 65 in the garage, and makes it hot to the touch! *edit* this thing gets to about 130 F or so. it's tolerable, but not for long! looks like the heater is pretty decent in there, and it REALLY helps with the cleaning!!!

ok, so i have some questions now. i can't find any information about what this stuff is in the carbs. nothing in the service manual or in the clymers...

when i pulled off the accelerator pump cover on the #2 carb, i noticed a little plastic square peeking up at me, in the float bowl form this location:

and another one, as can be seen still intact in the cover, here:

when i pulled out the piece of plastic from the float bowl itself, the first picture, i found the plastic piece and a ball bearing, as can be seen here from two angles:

now i ask you, what are these for?? are they ok to re-use?? i know it has something to do with the accelerator pump, but i have no clue WHAT!!! thanks a bunch guys!!

climbingaz · « **Reply #37 on:** March 14, 2010, 08:01:15 AM »

Take a look at this article about the accelerator pump....should give you all the info you need to rebuild it if needbe:

http://www.hondachopper.com/garage/carb_info/accelpump_valve_repair/page1.html

wannabridin · « **Reply #38 on:** March 14, 2010, 09:21:58 AM »

THANK YOU!!!! this helps SO much!!! hopefully i can do all this right and not screw it up!! haha. now off to the hardware store to get a hand bit holder... thanks AZ!!!

wannabridin · « **Reply #39 on:** March 29, 2010, 08:50:03 AM »

short of going thru the carbs once more with some carb cleaner and more compressed air and cleaning out the accel pump cover, i'm getting close to being able to put them back together! i blasted everything with my soda blasting cabinet, and ran them thru the heated US cleaner a couple times, so i'll put some pics up soon after work!

question though... before i button them all up again, whats a good baseline for jet sizes and needle positions? also, anything i need to do to the emulsion tubes, ie drill out any holes? i'll double check all the sizes when i get home to confirm everything.

for those that dont want to look at the previous page, i'm planning on running a slightly hopped up stocker bore. ie, bigger cam, MReick stage 2 head, carpy 4-1 pipe, Hondaman ignition, hotter coils. thanks guys!!!

wannabridin · « **Reply #40 on:** March 29, 2010, 01:56:08 PM »

any carb setup advice?? they're '77 PD carbs...

wannabridin · « **Reply #41 on:** April 01, 2010, 11:05:29 AM »

guys?? help?? i think i have #35 slow jets in there, and i'm pretty sure the mains are 105's. also, i got an accelerator pump rebuild kit, and there's a small rubber piece that shows going on the end of the pump rod, looks like a miniature fork gator. there's a hole on the top of it, but it's too small to slide down the accel pump rod. any ideas here??

please help guys! oh ya, is my float bowl height 12.5mm or 14.5mm?? thanks!

climbingaz · « **Reply #42 on:** April 01, 2010, 12:17:34 PM »

Quote from: wannabridin on April 01, 2010, 11:05:29 AM

guys?? help?? i think i have #35 slow jets in there, and i'm pretty sure the mains are 105's. also, i got an accelerator pump rebuild kit, and there's a small rubber piece that shows going on the end of the pump rod, looks like a miniature fork gator. there's a hole on the top of it, but it's too small to slide down the accel pump rod. any ideas here??

please help guys! oh ya, is my float bowl height 12.5mm or 14.5mm?? thanks!

Open up this link and go to page 45:

http://data.sohc4.net/HSMCB750K.pdf

Stock '77 setting for the main is #115, slow is #35 and float height is 12.5mm

wannabridin · « **Reply #43 on:** April 01, 2010, 04:31:04 PM »

that's what i thought it was, but i couldn't get the file to open at work! thanks for the post, i guess that'll be where i start off.

i guess the needle should be in the middle? it was on the top notch when i took the carbs apart, but i can't seem to find an answer for that so far...

well i was looking at the pictures in the supplement for the 77's and it LOOKS like the clips are in the middle, and this would make the most sense to me to start from here...

wannabridin · « **Reply #44 on:** April 26, 2010, 07:34:32 PM »

so i finally got around to uploading some more pictures. i've just been really busy helping the family out and hanging out with the girlfriend, so progress is slow... i was GOING to take the head off today to take a look at the size of the pistons so i could try to take advantage of Z1's 4th over deal for $200, but i ran out of time, oh well! i got some final touches on the carb part paint, so hopefully they'll be buttoned up ASAP!!

i DID take a closer look at my donor motor, a craigslist special for $200 about 2 years ago, and sadly, i found this... front motor mount cracked on the left side. hell, it's not cracked, it's straight up missing!! *sigh*

so what was going to be a rebuild while on the engine stand is going to turn into a tear down of BOTH motors for the best parts!! ARG!!! oh well, at least i'll have some spares to sell when it's all over for funding!!

either way, here's some pictures of the motor and where i'm sitting with the carbs currently. i decided to NOT paint the carb bodies, as until i reassembled them, i was planning on polishing them. after a couple times over with very fine steel wool and some dremel polishing compound, i decided to ditch that idea and just paint the tops, bowls, backing plate and other hardware a nice Aluminum engine enamel paint. i think they'll look ok! comments are always appreciated! oh ya, jet specs are:

needles in middle position, 115 mains, 35 slows, and i got the float height just about as close as i could to 12.5mm using a caliper w/ depth gauge and instruction i found online. i've also rebuild the accel pump, and all the passageways in there, so i'm hoping they preform well!!

[img width= height=]http://lh6.ggpht.com/_FrQoD_MLXyQ/S9ZKkEo__SI/AAAAAAAAAeM/2SssrPLQjcs/s800/IMG_0343.JPG[/img]
[img width= height=]http://lh6.ggpht.com/_FrQoD_MLXyQ/S9ZKlGcbgcI/AAAAAAAAAeQ/nlwTUwb6k1E/s800/IMG_0345.JPG[/img]
[img width= height=]http://lh4.ggpht.com/_FrQoD_MLXyQ/S9ZKmIBV_BI/AAAAAAAAAeU/pkgZ4c7B-rs/s800/IMG_0346.JPG[/img]
[img width= height=]http://lh4.ggpht.com/_FrQoD_MLXyQ/S9ZKngRLmpI/AAAAAAAAAeY/sbVPDiMMP78/s800/IMG_0348.JPG[/img]
[img width= height=]http://lh5.ggpht.com/_FrQoD_MLXyQ/S9ZKpSLBBSI/AAAAAAAAAec/mvbF53HsmfY/s800/IMG_0349.JPG[/img]
[img width= height=]http://lh4.ggpht.com/_FrQoD_MLXyQ/S9ZKrMeZCwI/AAAAAAAAAeg/N5R1Jpm03tk/s800/IMG_0351.JPG[/img]
[img width= height=]http://lh6.ggpht.com/_FrQoD_MLXyQ/S9ZKstrV3BI/AAAAAAAAAek/rGPpHUFgtAA/s800/IMG_0353.JPG[/img]

Zaipai · « **Reply #45 on:** April 26, 2010, 08:12:29 PM »

Any chance you could have that motor mount welded back on? Too bad about that however its now some thing I will watch for. The carbs are looking great. I like the paint idea, may do that to mine next time I tear them apart...

Keep em coming..

.: Scott :.

wannabridin · « **Reply #46 on:** April 27, 2010, 06:06:48 AM »

well i'm pretty sure i could have it welded back, or at least something welded back on, but i'd have to either take it somewhere or send it somewhere that knew wtf they were doing! i'll need someone to chime in on that one, because the cases are aluminum, are they not? i don't really trust myself to weld on 30+ year old aluminum if that's the case...

the carbs look ok, but the paint is so smooth and good (i don't mean to brag but it came out very well) that it makes the carb bodies look kind of dingy, haha! i'll have to see how everything looks when i get it all back together, i just might have to throw a coat on there, i'm not sure yet

Little_Horse · « **Reply #47 on:** April 27, 2010, 07:26:27 AM »

I will chime in on the welding issue. Someone who knows what they are doing would be able to weld the case back together just fine. That is the problem though, in the welding industry lots of people "think" they can weld really well but can't. That is why I am always fixing other people's projects at work. They think because the have had some success with steel that for instance stainless should be easy right? Anyways my little tid bit of info, ask around some shops and find out who actually went to college to learn how to weld and you have alot better bet they will know what to do. Thats been my experience at least. If you were closer to me I would do it for you for free, some people may find that weird but I like helping and if it means keeping one more of these motors from the scrap pile. Anyways good luck.

wannabridin · « **Reply #48 on:** April 27, 2010, 09:18:21 AM »

Quote from: cornandp on April 27, 2010, 07:26:27 AM

I will chime in on the welding issue. Someone who knows what they are doing would be able to weld the case back together just fine. That is the problem though, in the welding industry lots of people "think" they can weld really well but can't. That is why I am always fixing other people's projects at work. They think because the have had some success with steel that for instance stainless should be easy right? Anyways my little tid bit of info, ask around some shops and find out who actually went to college to learn how to weld and you have alot better bet they will know what to do. Thats been my experience at least. If you were closer to me I would do it for you for free, some people may find that weird but I like helping and if it means keeping one more of these motors from the scrap pile. Anyways good luck.

corn,

if you honestly feel confident with your work to where you could put your "stamp" on the welds integrity, i would gladly mail it up to you and pay for the return shipping. i love to support forum members, and if this could be a plug for your work, i will gladly support it!

how would you purpose fixing it though? i'd like to hear your strategy

Zaipai · « **Reply #49 on:** April 27, 2010, 04:12:58 PM »

JB Weld?

.: Scott :.

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Author Topic: 76 750K this bike will change my life. (Read 68882 times)