L-Plate Rider
When i start my bike (1989 Suzuki GSX-R250) it takes about a minute before i can use the throttle. It idles and wont rev at all. If i let the throttle go completely it dies. This also happens occasionally when im starting in 1st gear from a stop, i apply some throttle and i get nothing, i can wind it right around. Sometimes it will kick in and rev a few seconds later other times it will take 15-30 secs.
Anybody got any ideas?
Cheers
Andrew
Der gummikuh man
Are you using the choke? Does this only happen when it is cold?
It sounds like a fuel mixture problem to me...
Queiro voya todo Europa con mi moto.... pero no tengo suficiente tiempo o dinero.....
L-Plate Rider
It happens whenever it hasnt been used for an hour or so. Yeah fuel mixture was my guess too. When it will finally rev when starting it spits out a bit of smoke.
on the up
Its running way rich Hitman. Check your choke cable - when they get old they tend to stick and don't go back, leaving the choke partly on.Originally Posted by Hitman
Also, your plugs could be shot too. Or, you could have an old, dirty air filter thats messing with the air/fuel mix by not allowing enough air in too.
And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.
- James Dickey, Cherrylog Road.
Hardcore Biker
or possily shite in the carby. maybe a sticky jet. give er some tlc.
i miss my old gixxer 250
Team Brehaut Racing
It's a Suzuki... that's your problem
Average trowel is average!
Yamaha isn't much better, I have a laggy throttle and petrol hungy bike. Could be many things. Given it an oil change along with filter, next thing is the airfilter.
L-Plate Rider
Which fuel am i surposed to be using? I put 91 in it, but i think i was surposed to put 96 now. Could this be the problem?
Average trowel is average!
Why are you supposed to use 96?
Der gummikuh man
wont make that much difference.... 91 will do for your bike
Queiro voya todo Europa con mi moto.... pero no tengo suficiente tiempo o dinero.....
on the up
To eliminate pinking, or pre-detonation.
Detonation (also called "spark knock") is an erratic form of combustion that can cause head gasket failure as well as other engine damage. Detonation occurs when excessive heat and pressure in the combustion chamber cause the air/fuel mixture to autoignite. This produces multiple flame fronts within the combustion chamber instead of a single flame kernel. When these multiple flames collide, they do so with explosive force that produces a sudden rise in cylinder pressure accompanied by a sharp metallic pinging or knocking noise. The hammer-like shock waves created by detonation subject the head gasket, piston, rings, spark plug and rod bearings to severe overloading.
Mild or occasional detonation can occur in almost any engine and usually causes no harm. But prolonged or heavy detonation can be very damaging. So if you hear knocking or pinging when accelerating or lugging your engine, you probably have a detonation problem.
The octane rating of a given grade of gasoline is a measure of its detonation resistance. The higher the octane number, the better able the fuel is to resist detonation. Most engines in good condition will run fine on regular grade 87 octane fuel. But engines with high compression ratios (over 9:1), turbochargers, superchargers, or with accumulated carbon deposits in the combustion chamber may require 89 or higher octane fuel.
How a vehicle is used can also affect its octane requirements. If a vehicle is used for towing or some other application where the engine is forced to work hard under load, a higher octane fuel may be necessary to prevent detonation.
If switching to a higher octane fuel fails to eliminate a persistent detonation problem, it probably means something else is amiss. Anything that increases normal combustion temperatures or pressures, leans out the air/fuel mixture, or causes the engine to run hotter than normal can cause detonation.
And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.
- James Dickey, Cherrylog Road.
Average trowel is average!
So how would I know if my 88 FZR would run fine with 96?
Cap, Shirt, Bata Bullets...Go
Count me in there with my '00 VTR250. Coming up to first fill (damn the SWMBO for not giving me a free weekend yet), so I need to know if I should start feeding her 96 and stay there.
on the up
You probably wouldn't notice any difference at all in performance. Just in the back pocket.
Is the bike currently pinking? If so, is it pinking because the fuel octane is too low? Many things to look at first - if its tuned well, and still pinking under load there could be a case for higher octane.
My fzr750r pinked like crazy under acceleration when I first derestricted the airbox/exhaust without doing anything else. The solution was to go up in main jets as it was sucking in FAR too much air compared to petrol.
Look to replace your coolant as well Magua. A bike running hot tends to run lean as well. Your FZR should go fine on 91.
And I to my motorcycle parked like the soul of the junkyard. Restored, a bicycle fleshed with power, and tore off. Up Highway 106 continually drunk on the wind in my mouth. Wringing the handlebar for speed, wild to be wreckage forever.
- James Dickey, Cherrylog Road.
L-Plate Rider
Finally heard back from the mechanic, hes says its not compressing. and it will take about $600 in labour not including anything that needs replacing. What exactly does this mean? and is it something i could do myself with a workshop manual and a bit of time?
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