Author Topic: basic cafe build. first attempt.  (Read 1211 times)

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Offline Bigbo1234

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basic cafe build. first attempt.
« on: July 31, 2011, 11:46:12 AM »
Hey everyone, im new to this forum and to motorcycles. last december my neighbor passed away and his family offered me a heap of iron beneath a pile of snow from his deck. i accepted. after a while of digging it out and bringing it home i got to town on it. it was a 1976 cb750 with 11000 miles, and a stuck motor. all stock. i had it running in 4 days.(lots of marvel mystery oil, that stuff is so good i could drink it). being december i was not able to ride it until late this spring. ive done quite a bit of work on it and replaced the necessary safety parts like tires and drive chain and so on. ive had almost every part of this bike apart except the engine, i did pull it to free it though. not too long ago at the local scrap yard i came across a 1972 cb750 under a pile and dug it out. accually there were two but one was a cb750a. the bike was missing a lot of parts but still has a good motor(i think) had a nice 4-1 exhaust and extra rims. picked it up for $60. no gauges tho so i dont know how many miles are on it. it has some fins on the engine that are broken. im looking to build i decent bike and i wanted to bore the engine. can any of you give your input on what engine i should use. my good bike has compression all over the place 80-102-87-95. but somehow it still runs pretty good. ive put 1000 mile on it so far. i have no clue as to the other engine. ill be pulling it off soon. ill try to get some pics of me material on here soon. thanx.
76 Honda cb750
72 Honda cb750
73 Yamaha rd200 electric

Offline rickmoore24

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Re: basic cafe build. first attempt.
« Reply #1 on: July 31, 2011, 02:57:23 PM »
Welcome and keep saving these old beasts!
1972 CB750 K2 (Daily Runner)
1972 CB750 K2 (Sold)
1973 CB750 K3 (Hardtail 836cc)
1998 CBR F3 - R.I.P., went down on the 101 in Calabasas, Ca.
1995 EG6

Offline Bigbo1234

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Re: basic cafe build. first attempt.
« Reply #2 on: July 31, 2011, 04:28:38 PM »
i was also looking for some advice one what i should bore it out to. im lloking for a bike with a good bit of performance, loud pipes, and sharp. but withing a working family man's budget. any advice is greatly appreciated.
76 Honda cb750
72 Honda cb750
73 Yamaha rd200 electric

Offline Retro Rocket

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Re: basic cafe build. first attempt.
« Reply #3 on: July 31, 2011, 08:08:58 PM »
Try a weisco 836 kit, they are fairly cheap and been proven over 10's of years. Most of the restriction is in the Head, a good port job will free up more HP than anything else.......But it can be expensive....
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Bigbo1234

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Re: basic cafe build. first attempt.
« Reply #4 on: July 31, 2011, 08:47:56 PM »
thanks, i was thinking the same thing. what about a cam.  what type of lift and duration should i look for? what is the stock cam specs? pulled the motor of the junkyard bike tonight. seems to be clean and better shine than me runing bike. the oil was black as black. but thats all i expected, im glad there was oil in it.
« Last Edit: July 31, 2011, 09:03:48 PM by Bigbo1234 »
76 Honda cb750
72 Honda cb750
73 Yamaha rd200 electric

Offline Retro Rocket

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Re: basic cafe build. first attempt.
« Reply #5 on: August 01, 2011, 12:28:41 AM »
When you get sorted try giving MRieck {forum member} a PM, he is a head guru and will advise on what cam best suits your needs..

http://forums.sohc4.net/index.php?action=profile;u=49

Mick
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Bigbo1234

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Re: basic cafe build. first attempt.
« Reply #6 on: August 01, 2011, 07:36:42 PM »
got the engine tore down tonight, head jugs and pistons, dirty but in good shape, #3 valves are nasty. i cant seem to get any pictures posted. i must be doing it wrong.
76 Honda cb750
72 Honda cb750
73 Yamaha rd200 electric