I have a 1995 Honda CBR600F3. It rides pretty good still but i have trouble starting it often. Usually i have to really crank the choke up to get it to start and then let it run for a while before i can turn off the choke. if i turn off the choke too soon the bike will stall. i changed the air filter and that didnt seem to help much. Any advice??? Thanks.
2007-03-30 05:06:20 · 7 answers · asked by Anonymous in Cars & Transportation ➔ Motorcycles
i have to agree with guardrail. once a plug starts to foul up, it makes starting a real pain in the azz at best, total no-start at worst. i have a feeling ur plugs are getting carbon fouled. to verify, pull a plug. if they're black, they're fouled. that comes from 1 of 2 sources. 1st: runnin the choke full open for too long. 2nd: the carbs are set too rich. another scenerio is, u have a gasket leaking around the manifold.
quick fix is, thorougly wire brush the plugs clean, or just drop in a new set.
to prevent fouling, do this: choke out full, give it a couple of rolls of throttle and release throttle. hit the starter. it should fire up instantly and smoothly.
bring it up to 2000 rpm and lock the throttle if u have a throttle lock. start feeding in the choke until the rpm's drop a bit. give it about 30 seconds and feed more choke in. from start to finish, u should be from full choke to no choke within a couple of minutes during warm up. after u fully push the choke in, i recommend idling at normal idle until the bottom of the heads is warm to the touch at the very least and its ready to ride. if u keep the choke on too long, it's extremely easy to foul plugs.
2007-03-30 10:51:41 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The first answer is good. I can only add that most modern bikes are set up to run very lean for emission control purposes. Your bike could probably benefit from the installation of a DynoJet jet kit, available through any bike shop. The kit should improve your start up, warm time, and general runability.
2007-03-30 05:25:47 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Pull that air cleaner off...pull the choke all the way, and see if the butterfly is closing all the way....
look at your exaust pipes, the end...inside, they should be more to the grey side, not jet black...take the spark plugs with you, whn u go 2 buy more, ask if maybe u shld b running a hotter plug....and the thg u dont wanna do is start turning screws on them carbs, espically if u have 4.......
2007-03-30 11:25:28 · answer #3 · answered by DennistheMenace 7 · 0⤊ 1⤋
Actually most bikes need to run on the choke for an extented period of time, as long as you can eventually turn it off everything is normal! If it is longer than it should be you need carburator work done.
2007-03-30 06:59:15 · answer #4 · answered by roeschli 1 · 1⤊ 1⤋
Assuming all else if ok, rings, valves etc. I would guess that the carbs need cleaning. I would make sure the gas tank is clean, change the filters and rebuild the carbs.
2007-03-30 05:11:31 · answer #5 · answered by renpen 7 · 0⤊ 0⤋
Take a look at the spark plugs. Sport bikes like to foul the plugs. If they're slightly fouled, it makes starting difficult to impossible. When they heat up they're usable. When they cool down, they resort to their usual fouled state.
2007-03-30 05:29:53 · answer #6 · answered by guardrailjim 7 · 0⤊ 0⤋
Rebuild the carbs.
2007-03-30 06:44:45 · answer #7 · answered by Anonymous · 0⤊ 0⤋