Mikuni float bowl rubber bungs

Dennis menace · 24-10-2014, 10:45 AM

I have bought a new pair of Mikuni BST38 carbs on fleabay. The float bowls each have two rubber bungs as blanking plugs and I want to know if these are supposed to be replaced with more substantial threaded plugs? I am worried the rubber bungs will leak air or petrol as they just push in. The holes in which they fit are about 10mm diameter with a fine metric thread. An hydraulic banjo bolt fits the hole.

A Ducat suite article shows the bungs about halfway down the article:

http://www.ducatisuite.com/carbsynch.html

The original carbs have no blanking plugs.

Many thanks.

24-10-2014, 11:03 AM

If it's the ones from this picture they are covering the threads for the carb heating system and can be left there.

Dennis menace · 24-10-2014, 11:05 AM

Great, many thanks.

24-10-2014, 10:45 AM	#1
Dennis menace Registered User Join Date: Nov 2013 Location: Farnsfield Bike: Other Ducati Posts: 300	Mikuni float bowl rubber bungs I have bought a new pair of Mikuni BST38 carbs on fleabay. The float bowls each have two rubber bungs as blanking plugs and I want to know if these are supposed to be replaced with more substantial threaded plugs? I am worried the rubber bungs will leak air or petrol as they just push in. The holes in which they fit are about 10mm diameter with a fine metric thread. An hydraulic banjo bolt fits the hole. A Ducat suite article shows the bungs about halfway down the article: http://www.ducatisuite.com/carbsynch.html The original carbs have no blanking plugs. Many thanks.

24-10-2014, 11:03 AM	#2
Unit 18 Guest Posts: n/a	If it's the ones from this picture they are covering the threads for the carb heating system and can be left there.

24-10-2014, 11:05 AM	#3
Dennis menace Registered User Join Date: Nov 2013 Location: Farnsfield Bike: Other Ducati Posts: 300	Great, many thanks.