Thank you very much for taking time and providing me with all these details. Will start checking the things you list one by one. I am in NY...its cold season. I am still commuting to work on my NH. Again. Thank you very much.
On Monday, December 10, 2012 6:02:45 AM UTC-5, surfswab wrote: > 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.
