TK4
Well-known member
After 45+ years prepare for the worst.
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Looking for reliable mechanic for older Honda CB750
- Thread starter jemberlin
- Start date
jemberlin
Well-known member
Please dont say pods. Please dont say pods. Please dont say pods.
Guy I bought from used to be a mechanic and works on his own bikes. I trust him.
4. Carb adjust and timing, new air filter
5. Running a Dyna Coil
6. Stock airbox with new air filter
Robbo
Well-known member
It’s good you have basically a stock airbox setup.
If he didn’t check valve clearances and compression I would start there. I had what sounded like a noisy cam chain on my CB350f that was actually a symptom of bad exhaust valve clearance on two cylinders.
I would also re-check the carb settings and timing, as well as the health of the entire electronics system.
You still haven’t told us how many miles are on the bike.
Where are you located?
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If he didn’t check valve clearances and compression I would start there. I had what sounded like a noisy cam chain on my CB350f that was actually a symptom of bad exhaust valve clearance on two cylinders.
I would also re-check the carb settings and timing, as well as the health of the entire electronics system.
You still haven’t told us how many miles are on the bike.
Where are you located?
Sent from my iPhone using Tapatalk
why not contact him for either more details on the bike or hire him for it
jemberlin
Well-known member
Mileage is roughly 30k miles. I live East York near Woodbine and Danforth.
TK4
Well-known member
The guys at 109 Cycle (Warden and Danforth Rd.) MIGHT take it on as a winter project.
Send them an email with some pics - service@109cycle.com.
Any way you look at it is going to be serious $$$, might be better just to sell as is and walk away.
Roadghost
Well-known member
Your bike is very likely running rich. The carbon and the hot exhaust headers are a dead giveaway. If your bike is high mileage you could be in need of a new timing chain also, usually the rattle is a giveaway. The chain can be replaced because the part is readily available. If you continue to run the engine rich those exhaust headers will change colour and crack. They are out of production and second hand sellers will rip you off for a set of crappers. Most shops can do the work. Finding any other parts could be a problem.
Robbo
Well-known member
The rattle could simply be an out-of-adjustment cam chain and the tensioner is stuck which is a common issue.
If carbs were ever “rebuilt” with aftermarket carb kits, they can cause all sorts of tuning issues (needle tapers are off, jet sizes not perfect, poor quality o-rings). The original brass is often best cleaned and re-installed.
There was a bad period for Dyna ignitions on CB750s with a high failure rate. They can have intermittent problems and can be a challenge to diagnose as they only start to act up when hot and test good when cold.
Poor resistance in the spark plug caps and wires can cause weak spark/ignition and carbon fouling.
There could be one issue, or multiple issues. A lot of things can and should be checked/adjusted before opening up the carbs and motor. The easy checks only cost time if you already have all the tools.
If the OP lived closer to me, and the bike was rideable, I would have already offered to help the rider out.
Btw, parts availability on these old CBs is quite healthy if you know the right sources and the right people.
Sent from my iPhone using Tapatalk
If carbs were ever “rebuilt” with aftermarket carb kits, they can cause all sorts of tuning issues (needle tapers are off, jet sizes not perfect, poor quality o-rings). The original brass is often best cleaned and re-installed.
There was a bad period for Dyna ignitions on CB750s with a high failure rate. They can have intermittent problems and can be a challenge to diagnose as they only start to act up when hot and test good when cold.
Poor resistance in the spark plug caps and wires can cause weak spark/ignition and carbon fouling.
There could be one issue, or multiple issues. A lot of things can and should be checked/adjusted before opening up the carbs and motor. The easy checks only cost time if you already have all the tools.
If the OP lived closer to me, and the bike was rideable, I would have already offered to help the rider out.
Btw, parts availability on these old CBs is quite healthy if you know the right sources and the right people.
Sent from my iPhone using Tapatalk
jemberlin
Well-known member
Where are you getting those words from? I asked if anyone knows a good and reliable mechanic. I didn't say anything about wanting it cheap or wanting them to source vintage parts for me.So he is looking for a great vintage bike mechanic, that knows all the right sources and the right people to get all the parts for his vintage Honda and works super cheap
Trials
Well-known member
Elsewhere in the thread, I was serious about the add in CVMG, that's where you will find the guys that have the time, knowledge and maybe even the parts you need.
The problem with hiring a motorcycle mechanic to work on your bike at close to a hundred bucks an hour is that you are going to be paying him that much an hour to search and organize the required expensive parts and shipping etc.
sid_for_speed
Well-known member
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Riding an old bike, there are three things you need. A shop manual(easy to download for free of the web), a bike specific forum for advise and information and some basic tools. Otherwise, you might as well get a newer bike and just ride. If you have no mechanical skills a vintage bike is not for you.
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