Topic: just got a cb750

[troppo]

G`day guys
OK i`ve just picked up two cb 750`s, one a runner and the other in pieces
the runner needs a kit put through the front caliper, so i figured i may as well do front and rear at the same time (just to make sure i can stop safe )
its rattly when you start it up, and after reading through the site i`ve got all the oils and fluids for a service and have ordered a carb balancer.
i`ll adjust the cam chain as i`ve seen in various posts .
so i`m after some advice here, is there anything else i should do before i decide to take her out for any long rides.
the frame has the numbers CB750F 108****  (a 75 if i got it right) and the engine is CB750E 255**** (a 76 i think)
heres a couple of pics



she needs a little work before rego, but i can use the trade plate from work to take her out for a test run or two if needed
looking forward to the benefit of your experience
cheers all
troppo

ps. i hope this is the right place for this post

[CB750F2]

G'Day Troppo. A few suggestions. Make sure the bike is road worthy ie front and rear brakes are operational, all turn signals, stop lights, and head light are operational, no serious oil leaks and tyres have enough tread and haven't gone hard due to old age. Other things to do:-
       Obtain a service manual that covers your model
       Change oil and filter
       Check plugs, leads and caps
       Check points and set ignition timing
       Check and adjust valve lash
       Inspect inside of tank and if rusty flush out and clean and add an inline filter
       Remove carbs, clean and set float levels, bench sync, refit carbs
       Check air filter and replace element if dirty/blocked.
       Start motor, adjust idle speed and sync carbs
       Go for a ride
Hope this helps. Pat from Qld
       

[troppo]

G`day pat
cairns boy here lol
air filters- its got pods on it but i have an original airbox with the parts bike, and i was even looking at doing an alloy airbox with scoops at the sides (motorbody builder by trade so metal work is no probs) any thoughts on which way to go?
getting new plugs this week, should i look into new leads ?
are points expensive? worth getting new ones and doing a full tune up
goint to do valve clearances
got a clean tank with the parts bike so can swap if this ones rough (any thoughts on fixing a rough tank, want to build a cafe style bike with the parts bike)
want to do the carbs but they are the dark arts to me lol
looking forward to riding the old girl, havent riden one of these for about 20 years and was blown away by them then
thanks for the help
cheers
troppo

[CB750F2]

Troppo, I am originally from Innisfail now living in Ayr. I thought that was an assie bike because the side badges on the fuel tank are missing - seems that was a common aussie mod.
The ignition leads are generally Ok but inspect them and if the insulation is not damaged just unscrew the caps and nip off about a half an inch with a pair of sidecutters and fit new NGK resistor caps.
I would replace the points and condensors unless you can verify that yours are OK. They come up occassionally on ebay but they are not that expensive from Honda.
If the tank is a mess inside there is a product called POR15 which seems to do a good job. POR15 supplies a fuel tank repair kit. Search this forum and you will find a lot of information on the subject. Good luck, Pat

[troppo]

thanks mate
i`ve heard of POR 15 through my metalwork but mainly as a paint like finish, will have to check out the fuel tank treatment
i wasnt looking at doing this as a restoration but as a good daily driver and spending the time on the parts bike, it might be crazy but i`ve been called that for many years lol
i just want to get back on a decent reliable bike and i`ve always thought that about these old girls

[CB750F2]

Troppo, Ok that's good. If the motor and transmission are Ok it should not be too expensive to get it to be a daily rider. However, it can be expensive if the motor needs some serious work and also if you want to put the bike back to its original condition. Parts are expensive from the Australian Honda dealers. Parts are much cheaper and more plentiful in the US. Freight for the larger parts is expensive from the US. So, if you decide to deal from the US wait until you know exactly what you require then place one order - get a quote which includes freight and deal with reputable companies. Pat

[CB750F2]

Troppo, If you need to replace your points and condensors I suggest that rather than spend money on new points and condensors contact "Hondaman" and buy one of his electronic ignition modules - $60/$70. These modules use your existing points. "Hondaman" is a member of this forum. Search this forum for info on the modules. Pat

[UnCrash]

Hi Mate,

Looks like a nice F1 you have there.


Another forum member advised:

      Obtain a service manual that covers your model
       Change oil and filter
       Check plugs, leads and caps
       Check points and set ignition timing
       Check and adjust valve lash
       Inspect inside of tank and if rusty flush out and clean and add an inline filter
       Remove carbs, clean and set float levels, bench sync, refit carbs
       Check air filter and replace element if dirty/blocked.
       Start motor, adjust idle speed and sync carbs
       Go for a ride

I would have to agree with all items but would only remove the carbs if she continues to run rough on you.  The rattling around that you hear is for a couple of reasons.  Adjusting the cam, timing, points, and balancing the carbs will get you up in tune and remove most of the imbalance that you hear.  The cam chain tensioner procedure is very particular so check your manual for that one...

There's a link somewhere on here for a shop manual downloadable via pdf that specs it out.

Best of luck & ride safe.

[troppo]

thanks uncrash
got a manual from the PO, seems to be a generic cb750 manual but have been saving plenty from here
was told when i bought it that one of the carbs might need a bit of work, so same as the brakes might as well do them all
pat (cb750f2) said that it could be cheaper to get parts from the us so will have to look into that
i`ve read on the boards here that the carb boots could be a bit of a problem with age and cracking so may have to look at getting new ones, have to check the old ones tomorrow
still wondering about the whole pods/airbox thing, dont know which way to go as i`ve read different opinions about the two
ah well heres me on my way to financial ruin but lots of fun hehehehehehehehe
cheers
troppo

[KRONUS0100]

one last bit of advice.........make sure that there are no kinks or broken teeth on the final drive chain and sprockets.......you don't want a broken chain at 40mph or more.