Make sure your brakes are not dragging, I never got less than about 43 MPG with mine and I re-jetted it and ran it hard most of the time. About 46 MPG was average back road consumption. Also excessively lean carbs can have the same negative affect on mileage, even more so than rich. Because you have to work the throttle so much more than necessary to get the bike to accelerate. I'd start with a proper carb cleaning, check the jets sizes while your in there. Javier has had 2 bikes with gummed up carbs that only got in the 20's MPG, both went to respectable figures after a carb cleaning. Sent via BlackBerry by AT&T
-----Original Message----- From: surfswab <[email protected]> Sender: [email protected] Date: Mon, 10 Dec 2012 03:02:45 To: Nighthawk Motorcycle Lovers!<[email protected]> Reply-To: [email protected] Subject: [Nighthawk Lovers] Re: 2000 Nighthawk 750 Low Milage issue First suggestion, buy a service manual. Clymer's a good one. Second, fewer than 40 mpg in constant stop/go traffic is fairly normal, but almost half that is not. Sounds like the engine is running rich. Are you mindful of turning choke off after warmup? If so, problem may be deeper. Try pulling the spark plugs and inspecting them. If they are sooty black or wet with gas that would confirm a rich mixture and might indicate a need for air/fuel mixture adjustment. Also check the choke cable for proper adjustment. Follow the cable visually from the handlebars to the connection at the left side of the motor. A two-finger fork style fitting at the end of the cable operates brass pins built into the tops of the carbs. With the engine off, move your choke lever from full on to full off and observe the operation of those pins (you'll probly be able to see only one of them. The rest are connected by a rod across all four carbs). If the choke is operating correctly, the brass pins should almost disappear into the carb bodies when you turn the choke off. With the choke full on, you should see about a quarter-inch of brass. Use your new service manual for adjustment procedures if needed. I'd suggest new plugs in addition to a new air filter and oil change as already mentioned. Sniff the oil to make sure there's no gas smell coming from it. And empty blowby gases/water from the clear plastic tube hanging down from the frame, under your right foot peg (it has a plastic plug in the end) Balancing the carbs wouldn't hurt either (service manual, again, for a description of the procedure). The motor was designed to run on regular gas, so switching to higher octane would have no affect unless it's pinging or dieseling. Before you put a wrench to it, though, try a weekend 100-150 mile, open road (non-stop/go) run to see if you're mileage figures improve. Should be in the low-mid 40s -- more, if you ride sedately, less if you don't. On Dec 9, 6:07 pm, Sanna <[email protected]> wrote: > Hello > > Bought a 2000 NightHawk 750 3 months back. Been using to commute to work > about 15 Miles both ways, stop and go City traffic. Noticied I am getting > about 22-26 Miles a gallon. Switched to 93 Premium grade gas, almost same > thing. Please advise. I was hoping to get about 40 miles per gallon in the > City. I want to go for long rides / cross country during Summer. > > Your suggestions and advise is very much appreciated. Thank you. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. Visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en-US. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. Visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en-US.
