Author Topic: 4 into 4 originals to fit a '78?  (Read 1354 times)

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Offline Thunder

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4 into 4 originals to fit a '78?
« on: November 24, 2008, 08:16:09 AM »
Hi guys, well i was in a bike shop the other day(y'know the small town types where one guy does everything) when he pulled out of the back a nearly mint condition original cb 750 4 into 4. well i bought it there and then, as its exactly what i need for my cafe racer project.

after browsing the forums a bit i see the frames etc had some changes over the years..My question (even if i gotta make brackets) will the original exhausts fit on my cb 750f2???

please tell me yes.

Offline TwoTired

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Re: 4 into 4 originals to fit a '78?
« Reply #1 on: November 24, 2008, 08:31:04 AM »
My question (even if i gotta make brackets) will the original exhausts fit on my cb 750f2???

please tell me yes.

 :-\ :-X   :( :'(
Lloyd... (SOHC4 #11 Original Mail List)
72 500, 74 550, 75 550K, 75 550F, 76 550F, 77 550F X2, 78 550K, 77 750F X2, 78 750F, 79CX500, 85 700SC, GL1100

Those that learn from history are doomed to repeat it by those that don't learn from history.

Offline cafe750

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Re: 4 into 4 originals to fit a '78?
« Reply #2 on: November 24, 2008, 08:36:15 AM »
Um, 4-4's were made for the K-bikes. F bikes have a 4-1. That being said, anything can be made to fit with a torch and a hammer...but they wont bolt straight up... :-[
"It's an old motorcycle, the wind is supposed to blow your head around, it's supposed to leak oil, the brakes should suck, and every now and then, it should scare you so bad you piss your pants."



Roy, Washington

eldar

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Re: 4 into 4 originals to fit a '78?
« Reply #3 on: November 24, 2008, 08:50:46 AM »
Well engine-wise, the mount points are different. They should still fit. The problem is the mounting on the frame. You will need to fab up brackets to hold the pipes.

Offline SOHC Goat

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Re: 4 into 4 originals to fit a '78?
« Reply #4 on: November 24, 2008, 09:07:36 AM »
Are those 4x4 pipes off of a 1978 750 K?  If so, I'd be interested it buying them from you.

Offline KB02

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Re: 4 into 4 originals to fit a '78?
« Reply #5 on: November 24, 2008, 09:54:09 AM »
Are those 4x4 pipes off of a 1978 750 K?  If so, I'd be interested it buying them from you.

A good question to ask would be what year the 4 into 4's came off from? That would give us a better chance of helping.

As for the K's being a 4 into 4, and the F's being a 4 into 1, the biggest issue I really foresea would be the mounting bracket on the brake side. F's are kicked out a bit more on that side to make room for all the disk brake stuff.
1978 CB750K Project
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