M750 carb balancing help please.

jerry · 13-02-2023, 10:56 AM

It is very fiddly I have 3 carbed 750s all with oil cooler so plenty of practice ,, you need a long philips screwdriver , and torch . lie on you back on ground is best remove oil cooler for better access is a good idea it should pivot down under front head the hoses do flex enough but dont scratch mudguard , dont bother with mirror

Brian. · 13-02-2023, 02:01 PM

Hi Jerry,

Thank you for replying.

Do any of your bikes have the pipework to divert some of the engine oil through some pipework to the carb float chambers? Presumably, to do something about carb icing?

On the RHS (sitting on the bike) oil cooler has a T-piece in it, with a tap which is presumably to turn this system off in warmer weather? Because of this, and the braided hose that goes from this tap to the float bowls, even if I unbolt the oil cooler this pipework prevents me moving the oil cooler down out of the way.

The pipework from this tap goes from the RH oil cooler feed pipe to the RH float bowl, then to the LH float bowl, and from there another pipe returns back to the side of the RH oil cooler connection.

I have (I think!) attached three photos of this tap & pipework. Do any of yours have this system?

Thank you, Brian.

Edit - uploading the photos failed, I'll try again on a separate posting.

Brian. · 13-02-2023, 02:18 PM

Hi again!

Try again with the oil tap & pipe photos.....

https://www.dropbox.com/s/dez1j9gc1s...20tap.JPG?dl=0
https://www.dropbox.com/s/skajbofv44...pipes.JPG?dl=0
https://www.dropbox.com/s/8kqp3nuubt...union.JPG?dl=0

Hopefully those links will work.

Thank you again, Brian

13-02-2023, 10:56 AM	#1
jerry Old Git Join Date: May 2006 Location: Cricklade Bike: Multiple Monsters Posts: 2,826	It is very fiddly I have 3 carbed 750s all with oil cooler so plenty of practice ,, you need a long philips screwdriver , and torch . lie on you back on ground is best remove oil cooler for better access is a good idea it should pivot down under front head the hoses do flex enough but dont scratch mudguard , dont bother with mirror __________________ MONSTERMAN

13-02-2023, 02:01 PM	#2
Brian. Registered User Join Date: Sep 2022 Location: Little Haywood Bike: M750 Posts: 68	Hi Jerry, Thank you for replying. Do any of your bikes have the pipework to divert some of the engine oil through some pipework to the carb float chambers? Presumably, to do something about carb icing? On the RHS (sitting on the bike) oil cooler has a T-piece in it, with a tap which is presumably to turn this system off in warmer weather? Because of this, and the braided hose that goes from this tap to the float bowls, even if I unbolt the oil cooler this pipework prevents me moving the oil cooler down out of the way. The pipework from this tap goes from the RH oil cooler feed pipe to the RH float bowl, then to the LH float bowl, and from there another pipe returns back to the side of the RH oil cooler connection. I have (I think!) attached three photos of this tap & pipework. Do any of yours have this system? Thank you, Brian. Edit - uploading the photos failed, I'll try again on a separate posting. Last edited by Brian.; 13-02-2023 at 02:04 PM..

13-02-2023, 02:18 PM	#3
Brian. Registered User Join Date: Sep 2022 Location: Little Haywood Bike: M750 Posts: 68	Hi again! Try again with the oil tap & pipe photos..... https://www.dropbox.com/s/dez1j9gc1s...20tap.JPG?dl=0 https://www.dropbox.com/s/skajbofv44...pipes.JPG?dl=0 https://www.dropbox.com/s/8kqp3nuubt...union.JPG?dl=0 Hopefully those links will work. Thank you again, Brian