---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Wed 06/26/13: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:13 AM - Re: carb synch hose sizes (Roger Lee) 2. 12:21 PM - Re: carb synch hose sizes (Roger Lee) 3. 04:57 PM - Re: carb synch hose sizes (JohnE) ________________________________ Message 1 _____________________________________ Time: 07:13:07 AM PST US Subject: RotaxEngines-List: Re: carb synch hose sizes From: "Roger Lee" They are the small ones. I think around 1/4" OD and maybe 1/8" or less ID. The hole size should be small and the smaller the better. We don't care about volume just the vacuum. The larger hole sizes will just give you more needle fluctuation to dampen out. I would put a an adjustable needle valve inline on both vacuum lines so you can dampen any gauge needle fluctuation. I'm still old school in on my connection at the cross over. I just pull off the left side of the cross over tube rubber end. Then I know the carbs are separated and not leaking verses if I just pinch off the rubber between carbs. I then just use a barbed fitting and up-size to the hose end I need on the 90 degree fitting (3/8" poly hose) off the top of the manifold and a smooth shank fitting that goes into the rubber end on the cross over tube. (smooth shank= I took a barbed 3/8" barbed fitting and sanded off the barbs) You can certainly use the manifold port screws that are on top of the manifolds to make the connection, but then you still have to separate the carbs by pinching off the cross over tube rubber hose. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center - Heavy Maint. Rated Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403456#403456 ________________________________ Message 2 _____________________________________ Time: 12:21:25 PM PST US Subject: RotaxEngines-List: Re: carb synch hose sizes From: "Roger Lee" Here's an older picture, but it gets the point across and this works very well. I would use regular vacuum lines and not the clear plastic. The plastic does work. -------- Roger Lee Tucson, Az. Light Sport Repairman - Maintenance Rated Rotax Repair Center - Heavy Maint. Rated Home 520-574-1080 TRY HOME FIRST Cell 520-349-7056 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403473#403473 Attachments: http://forums.matronics.com//files/carb_sync_150_165.jpg ________________________________ Message 3 _____________________________________ Time: 04:57:58 PM PST US Subject: RotaxEngines-List: Re: carb synch hose sizes From: "JohnE" Roger Lee wrote: > Here's an older picture, but it gets the point across and this works very well. I would use regular vacuum lines and not the clear plastic. The plastic does work. Thanks for the picture. Makes sense to me now. How close are you able to get the difference between the carbs? Also, do you make the adjustments to a running engine or do you shut off between adjustments? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=403497#403497 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.