1979 CB 750 F2 primary chain

pioneer · L Plate Warrior Joined: 31 Jan 2011 Karma :

Not had bike long and it rattles on tickover. Have replaced timing chains but not primary chain. I have an extra engine to 'practice' with - is it a hard job?

Thanks a lot!

Vincent · Banned Joined: 16 Oct 2006 Karma :

Don't know about "hard" but it's a bit involved. The crank will have to come out as the primary drive is central. I'd check the tensioner first. Those duplex chains are designed to run almost for ever, what's the mileage?

When it comes to purtting the motor back together, always clear the oil galleries well, esp the top end, and at least 3 times Wink

pioneer · L Plate Warrior Joined: 31 Jan 2011 Karma :

pioneer · L Plate Warrior Joined: 31 Jan 2011 Karma :

pioneer · L Plate Warrior Joined: 31 Jan 2011 Karma :

Straight through MOT after 7 Years off road. American model. 17000 miles.

Vincent · Banned Joined: 16 Oct 2006 Karma :

This is what I think of as a Honda CB750 F2

https://i77.photobucket.com/albums/j71/Drewskovitch/honda_cb750f2.jpg

Vincent · Banned Joined: 16 Oct 2006 Karma :

And this is my favourite CB750 - the K2

https://i77.photobucket.com/albums/j71/Drewskovitch/cb750-k2.jpg

pioneer · L Plate Warrior Joined: 31 Jan 2011 Karma :

Is one your bike? very nice - i am sure mine will have been changed and modified on its way to me , but i like it. I am fairly new to bikes so wouldnt know exactly whats been done!

Vincent · Banned Joined: 16 Oct 2006 Karma :

Neither are mine sadly, (I'd love another K2 or K6), this one was mine in the early eighties and was a great, very reliable bike. I never liked the SOHC F2, they seemed heavy and clumsy compared to the K2. Your DOHC F2 looks in good shape, I can't remember hearing any major faults with them at the time, the 900s were very popular.

https://i77.photobucket.com/albums/j71/Drewskovitch/Scan2.jpg

mad4it028 · World Chat Champion Joined: 04 Jul 2006 Karma :

i seam to remember the main fault on the cb750 dohc was chocolate cams? but i may be thinking of another honda?
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always looking to buy bikes crashed ,unfinished projects,none runners pm me
currently riding kawasaki z1000 only bike ive ever loved

rob_scott92 · Could Be A Chat Bot Joined: 28 Mar 2009 Karma :

My uncles got a cb900f2 (near enough exactly the same as the 750) and from what i remember, the cam chains had a habbit of chewing their way through the cam chain tunnel back in't day Shocked

Saying that you'll 'probably' be fine Laughing

It could have been an earlier year actually, but i think you're actually supposed to adjust the cam chain whilst the engines running.

EDIT: Sweet bike that Drooling

. Original exhaust?
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First bike: 1982 Suzuki Gs 125 'The beast MK1' Wink

> 1988 Honda Cb 350's' FOR SPORT! (Good ol' oil burner!) > 2001 Suzuki Sv 650 's' Made it out of the 80's! > 1997 Honda Cbr 600f :p

Vincent · Banned Joined: 16 Oct 2006 Karma :

pioneer · L Plate Warrior Joined: 31 Jan 2011 Karma :

rob_scott92 · Could Be A Chat Bot Joined: 28 Mar 2009 Karma :

My uncles got a 4 into 1 neta system on his, doesn't look particularly good though. I think the original spec is 4 into 2, And from what you've said it most likely is the original. I'd deffo go fo a chrome one, just for the epic shiny-ness Laughing

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First bike: 1982 Suzuki Gs 125 'The beast MK1' Wink

> 1988 Honda Cb 350's' FOR SPORT! (Good ol' oil burner!) > 2001 Suzuki Sv 650 's' Made it out of the 80's! > 1997 Honda Cbr 600f :p

pioneer · L Plate Warrior Joined: 31 Jan 2011 Karma :

yes def chrome and will be a 4 into 2 as well!

pioneer · L Plate Warrior Joined: 31 Jan 2011 Karma :

Mine is an FZ not F2 as in title - sorry!