This listing is for ONE (1) NEW, Motorcycle Carburetor Vacuum Synchronizer Tool for use on twin cylinder British motorcycles.  We say British twins because most have a vacuum port on each intake manifold, otherwise known as the balance tube.  We first came across these vacuum gauges when tuning the four-cylinder Japanese motorcycles of the 1970's.  Attach the hose from each gauge to the port on each carb, adjust your air and idle screws to within spec until all gauges read the same.  Bada bada bing! Done to perfection and ready to fly!!  This was the only and best way to balance those 4 carburetor motorcycles.  It will work equally well on twin cylinders if you prefer to not balance the carbs by ear.  The gauges also help to diagnose carb malfunctions, i.e., vacuum leaks, stuck slides, worn "O" rings, improper cable pull, blatant obstinance etc., etc., The extensions are for use on non-Amal type carbs.  This is a quality EMGO product.

Included are two (2) gauges, one (1) mounting bracket, two (2) rubber hose lines, (2) two valves, one (1) 180mm extension, one (1) 65mm extension, one (1) instruction sheet and one (1) cardboard storage box.

If you are unsure of fitment email us.

Shipping is FREE Priority with Delivery Confirmation and Insurance in the USA.  CANADA 19.95.  Other International rate is 28.95.  We combine international orders to keep your shipping rate down.  Email us for a shipping quote before purchasing if you need multiple items.

On International Shipping:  We ship worldwide, however international shipping rates are very high compared to shipping rates within the U.S.  We try to keep international costs as low as possible.   If you buy multiple items we do combine shipping, please inquire for a quote. 

On Feedback:  After your package has arrived and you are satisfied with your purchase, we hope that you will leave us + Feedback.  We will return the courtesy.  Thank you for letting us help  you keep your motorcycle alive!