When I get on the gas in fourth gear and up starting at around 45 MPH the RPM go to around 7000 but the bike won't get up to speed. the bike does idol high at around 3000 RPM and sometimes it jumps up to 4000 just sitting there also, will do it sometimes with the clutch pulled. do I just need to get the carbs adjusted?
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how old is the fuel in the tank ? fuel goes off after 5months !! or it dould be contaminated with water or dirt etc , recomend cleaning the tank and removing the carbs and stripping and cleaning the jets etc !!
has the bike been unused for a long time ?
check that all spark plugs are sparking and check the compressions of each piston ! 100 psi or more is correct for each one , if less then the rings or the valves need investigating !
if you have any more information it will help me !
thanks Paul ...
Depends if you have a regular 3 speed automatic, or a 3 speed with overdrive. Put it in drive, it will start out in first gear, then shift into second at about 15 MPH, into third at about 30-35 MPH. With overdrive, fourth gear will kick in at about 45-55MPH.
The 1991 Honda CBR 1000F uses an in-line four cylinder, four-stroke engine that produces 36.5 cubic-inches of displacement. The engine uses a dual overhead camshaft system and has four valves per cylinder. The maximum power of the CBR 1000F is 93 horsepower at 11,000 rpm and the max torque is 45 ft-lb at 8,500 rpm. The motorcycle's compression ratio is11.3:1 while the bore by stroke ratio is 2.5 by 1.9 inches. The engine is liquid cooled. The transmission is a six speed and is chain driven. The top speed of the CBR 600F is 141 mph. Dimensions and Features
The overall weight of the 1990 Honda CBR 600F is 460 pounds. The total fuel capacity is 4.36 gallons. The seat height is 32 inches, and the wheelbase is 55 inches. The front tire dimensions are 110/80-17 and the rear tire dimensions are 130/80-17. The front brakes are dual 276mm piston caliper disc brakes while the rear brake is a single 220mm pistol caliper disc brake. The suspension system uses a mono-shock swing arm design. The power to weight ratio is .44 hp/kg. This bike can go 0 to 60 mph in 3.8 seconds. Appearance and Design
The 1990 Honda CBR 600F features a compact design. Close side mirrors flank a compact instrument panel and tight handlebars. This motorcycle sports a partial fairing that is designed for better aerodynamics. To reduce wind resistance, the legs and feet are fully positioned behind the motorcycle body. Like most sport bikes, when riding at fast speeds, the rider is intended to lie across the fuel tank to reduce drag. No chrome is visible on the bike, as the motorcycle body fully covers the chassis. The display panel features three gauges: a speedometer with built in odometer, a tachometer and a fuel gauge. The 1990 Honda CBR 600F is produced in various combination colors, including white, blue and red or black, purple and orange.
hi,i dont know a lot about this particular bike,but,as with any high revving sports bike you will need to keep the revs up before changing gear,an 883 sportster has a lot more torque than your bike and you can "short shift "them and let the torque do the work,however on a cbr i think you will need more rpm before you shift as they dont have the torque of your old harley,a friend of mine has an r6 yamaha,that thing revs out to nearly 17000 rpm he doesnt change untill about 9 or 10000 rpm,from memory your bike should be capable of nearly 60mph in first gear..hope this helps...cheers
Could be both the stator/alternator or the regulator/rectifier. I'd try replacing the cheapest unit (regulator/rectifier) first. Check if the insulation on the wires going to the regulator/rectifier look burned.
Only three things would cause the problem. 1) a slightly beny shift fork, 2) a shift index wheel loose, 3) the foot shift lever needs to be adjusted.
The most likely source is the shift lever needing to be lower. Once you are in 5th gear you move your foot to the top iof the pedal in preparation for a downshift. At high speed your entire body is leaning forward FOOT INCLUDED. Chances are that enough pressure is on the pedal to move the slider gear out of position and thus out of 5th gear.