Author Topic: motomotards 1978 cb750f super sport build (Read 2774 times)

motomotard · « **on:** April 10, 2010, 01:20:11 PM »

i pulled these off a long time ago and dont remember which way they face. manual says the "arrow" should be forward, but i dont have arrows, ive got dots. they face forward? that is the side with the most carbon so i assume thats correct... any help?

mlinder · « **Reply #1 on:** April 10, 2010, 01:30:25 PM »

bigger valve relief goes at the back, I do believe.

bwaller · « **Reply #2 on:** April 10, 2010, 03:06:42 PM »

You're right, arrows or dots toward exhaust.

motomotard · « **Reply #3 on:** April 10, 2010, 03:21:59 PM »

ok. thanks guys.

i also cant remember where these dowels and rubber spacer things go. they are on the head or jug somewhere, just not sure exactly where. anybody know where i put em?

motomotard · « **Reply #4 on:** April 10, 2010, 05:03:02 PM »

i assume the rubber thingies go around the studs, i only have four used ones, but there are eight in my gasket kit and with the head gasket on that looks right. pictured here:

still dont know where the four large metal dowels go or the two smaller ones pictured in the post above.

CB750F2 · « **Reply #5 on:** April 11, 2010, 04:34:39 AM »

I suggest that you download the K8/F3 service manual andhave a look at chapter 6 and 7. You need to get this right and there are good photos in the manual. Look carefully at these photos because there are differences between the K8 and the F3. Pat

motomotard · « **Reply #6 on:** April 11, 2010, 09:07:42 AM »

Quote from: CB750F2 on April 11, 2010, 04:34:39 AM

I suggest that you download the K8/F3 service manual andhave a look at chapter 6 and 7. You need to get this right and there are good photos in the manual. Look carefully at these photos because there are differences between the K8 and the F3. Pat

ok. ill try to find one.

ive already looked at diagrams online and its not very clear. i have a haynes manual and its not mentioned. ill see if i can find a manual to dl.

motomotard · « **Reply #7 on:** April 11, 2010, 01:18:49 PM »

this shows them i think, #3, they fit into the cylinder not the bottom of the head, im a idiot.

motomotard · « **Reply #8 on:** April 11, 2010, 03:48:12 PM »

so ive got the cam holder, cam and sprocket on, and the chain all on there.

manual says that when 1 and 4 are at tdc i should have the right end of the cam laying level with the cam holder. the two dashes should be lined up with the notch at 12 o clock. but when i get the T in the window at the points my cam ends up here......

fmctm1sw · « **Reply #9 on:** April 11, 2010, 04:05:59 PM »

Quote from: motomotard on April 11, 2010, 03:48:12 PM

so ive got the cam holder, cam and sprocket on, and the chain all on there.

manual says that when 1 and 4 are at tdc i should have the right end of the cam laying level with the cam holder. the two dashes should be lined up with the notch at 12 o clock. but when i get the T in the window at the points my cam ends up here......

Just one tooth off maybe?

motomotard · « **Reply #10 on:** April 11, 2010, 04:32:28 PM »

Quote from: fmctm1sw on April 11, 2010, 04:05:59 PM

Quote from: motomotard on April 11, 2010, 03:48:12 PM
so ive got the cam holder, cam and sprocket on, and the chain all on there.

manual says that when 1 and 4 are at tdc i should have the right end of the cam laying level with the cam holder. the two dashes should be lined up with the notch at 12 o clock. but when i get the T in the window at the points my cam ends up here......

Just one tooth off maybe?

yea. took me a couple tries but i got it. i guess i was about 1 or 2 off.

motomotard · « **Reply #11 on:** April 11, 2010, 09:05:00 PM »

guess ill make this my build thread.

got this 78' cb750f cheap. previous owner had pulled it apart, im puttin it back together

motor is back together now. got the cam in, valves adjusted, all new gaskets up top, including the o rings and stuff. gonna clean the frame up next and plop this #$%* down in there so ill have me a roller.

havent decided what color im gonna paint the motor so for now its stays black

motomotard · « **Reply #12 on:** April 14, 2010, 05:59:04 PM »

cleaned the frame up and got it rollin. this thing is clean. 32 yrs old and most of it still looks new. wheels are in crazy good condition.

motomotard · « **Reply #13 on:** April 25, 2010, 08:39:40 PM »

got a little bit done. motor is in the frame. shaved some useless tabs, will get some more off when i mock it up some more and figure out where my oil bag and electrics are gonna go. not sure if im sold on the stock tank or not. arent many options though. the goofy back bone support crap kinda makes it hard to try other #$%* on there.

Retro Rocket · « **Reply #14 on:** April 26, 2010, 01:58:02 AM »

Send one of the moderators a PM and get them to put your thread in the project shop, you will get more responses there..

Mick

motomotard · « **Reply #15 on:** May 06, 2010, 08:49:55 PM »

made my headlight bracket. took a piece of flat stock, cut it down, heated and bent it, shaped it up some and drilled some holes. its pretty solid on there too.

cleaned the carbs up, and put in my new carb kits, new jets, gaskets, etc... once i get it goin ill probably have somebody tune em.

they werent that bad to start with

my keyster kits

cleaned up and back together

motomotard · « **Reply #16 on:** May 06, 2010, 09:01:01 PM »

Quote from: retro rocket on April 26, 2010, 01:58:02 AM

Send one of the moderators a PM and get them to put your thread in the project shop, you will get more responses there..

Mick

yea if a mod could move this it would be great. i didnt find the project thing until after i started this one.

bucky katt · « **Reply #17 on:** May 06, 2010, 09:19:15 PM »

wish i had a drum brake rear wheel like that one, to match the front with a single disc. looking good!

motomotard · « **Reply #18 on:** August 11, 2010, 10:22:17 PM »

can anybody tell me how this wiring is "supposed" to be routed. i cant figure out where it should run

i think ive got all this stuff back in there right?

motomotard · « **Reply #19 on:** September 08, 2010, 12:51:32 AM »

finally had time to get more #$%* done.

motors back together, in the frame, wiring harness on.

will start and run now but still gotta to some tuning

got a seat pan cut down

and im gonna run this supertrapp which looks pretty cool

went by the local muffler shop and a dude there hooked me up on a muffler adapter. took him about 5 mins on their little pipe expander thingy. he refused to let me pay him so i got it done free. ill make another little support thing to keep it mounted up.

sounds pretty cool. video sound quality isnt great. the bike will start and idle real hard with the choke on, just shuts off with no choke. i dont have a tach yet so i havent messed with the carb/idle adjustment yet.

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and i gave the wiring harness a hair cut

motomotard · « **Reply #20 on:** September 09, 2010, 08:41:05 AM »

the bike will start now just fine. with the choke on, i just hit the button and it starts right up.

but it wont run with the choke off. im gonna go through the manual and follow the carb tuning/setup instructions.

but anybody got any tips on where to start? or how i should jet it?

gonna run pods with that supertrapp. ive read that ill need to go up 25% in jet size. right now theyre stock.

ill probly just drill em out with some jet bits. anybody done that before and have recommendations on how big i should go?

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Author Topic: motomotards 1978 cb750f super sport build (Read 2774 times)