Fzr400 2TK Pulling Away And Starting Problem

[Fzr400rr 3tj Danny]

Hey again
Yeah pretty much my bike wont start straight away it has to do 2 back fires before it starts, it will start if you bump it but will still back fire, but even if you push it in gear to turn it over couple times it helps it start properly. But she idles fine but some times revs high for no reason at all, and when i tried pulling away it seemed she is very weak. It feels there is compression in there from the suction in the piston and carbs but i havnt had it checked yet i dont know any one with a compression tester.

Its had another set of working carbs (dont think they are dirty but the previous ones did the same these ones just make it start easier) new spark plugs (but will be checking them tomorrow) and air filters cleaned

Please help as iv asked around a few mechanics and they want stupid money for couple hours of labour!!!

Thank you
Danny

[hipringle]

These engines are well known for stretching their inlet valves making cold starting a problem, my old one was like that, warm no prob but cold a right bastid. you really do need to compression check it first.

The high revving for no reason might be unrelated, poss poor throttle cable routing?, if you move the bars from side to side slowly when its idleing do the revs increase?

poss the carbs might need balancing but a compression check is first then take it from there. you can buy them on fley bay but check it has a small enough fitting for the bike.

[hipringle]

Second thoughts your bike is totally fckued, my 2tk needs spares, how about a mars bar & can of diet coke, I,ll collect for free

[Fzr400rr 3tj Danny]

These engines are well known for stretching their inlet valves making cold starting a problem, my old one was like that, warm no prob but cold a right bastid. you really do need to compression check it first.

The high revving for no reason might be unrelated, poss poor throttle cable routing?, if you move the bars from side to side slowly when its idleing do the revs increase?

I have the cable lose at the moment to make sure that wasnt the reason, i know when i first put the carbs on about a minute of starting not even that soon as the fuel got through it started straight away. Im pretty sure it isnt compression because it went like this the other day(with the different carbs) and then after riding it bit more (me thinking it was dirty carbs) it was running lovely then it died when i went slow and 2 back fires then it started again etc

[Fzr400rr 3tj Danny]

Second thoughts your bike is totally fckued, my 2tk needs spares, how about a mars bar & can of diet coke, I,ll collect for free

LOL nah my 3tj is screwed lol all the compression is gone out of that this is why im sure my 2tk isnt compression

[pastures16]

These engines are well known for stretching their inlet valves making cold starting a problem, my old one was like that, warm no prob but cold a right bastid. you really do need to compression check it first.

The high revving for no reason might be unrelated, poss poor throttle cable routing?, if you move the bars from side to side slowly when its idleing do the revs increase?

poss the carbs might need balancing but a compression check is first then take it from there. you can buy them on fley bay but check it has a small enough fitting for the bike.

as your the in house expert why does mine when i rev it is it real slow to come down on the revs sometimes it stays at 2k and dont like starting when warm cable is also free

[hipringle]

These engines are well known for stretching their inlet valves making cold starting a problem, my old one was like that, warm no prob but cold a right bastid. you really do need to compression check it first.

The high revving for no reason might be unrelated, poss poor throttle cable routing?, if you move the bars from side to side slowly when its idleing do the revs increase?

poss the carbs might need balancing but a compression check is first then take it from there. you can buy them on fley bay but check it has a small enough fitting for the bike.

as your the in house expert why does mine when i rev it is it real slow to come down on the revs sometimes it stays at 2k and dont like starting when warm cable is also free

Its fcdke mate tell you what................

No honestly I,m not too good with these it was just a question I could answer, Boris (evilchicken0) is the clued up fella for these bikes.

usually tho, a weak mixture or poor carb balancing might be the cause of it not returning too idle straitght away, maybe an air leak?, I dunno.

[Fzr400rr 3tj Danny]

These engines are well known for stretching their inlet valves making cold starting a problem, my old one was like that, warm no prob but cold a right bastid. you really do need to compression check it first.

The high revving for no reason might be unrelated, poss poor throttle cable routing?, if you move the bars from side to side slowly when its idleing do the revs increase?

poss the carbs might need balancing but a compression check is first then take it from there. you can buy them on fley bay but check it has a small enough fitting for the bike.

as your the in house expert why does mine when i rev it is it real slow to come down on the revs sometimes it stays at 2k and dont like starting when warm cable is also free

Yeah iv noticed some times mine doesnt go back down to normal idling speed some times but i swear these bikes have a mind of its own i was drinking a cup of tea while the bike was idling and next min it went up to like 4-6k revs so quickly went to the bike turned the idling screw down a bit and it went back to normal :S now im thinking my carbs are dirty but wouldnt that make the bike play up loads more?

[hipringle]

These engines are well known for stretching their inlet valves making cold starting a problem, my old one was like that, warm no prob but cold a right bastid. you really do need to compression check it first.

The high revving for no reason might be unrelated, poss poor throttle cable routing?, if you move the bars from side to side slowly when its idleing do the revs increase?

I have the cable lose at the moment to make sure that wasnt the reason, i know when i first put the carbs on about a minute of starting not even that soon as the fuel got through it started straight away. Im pretty sure it isnt compression because it went like this the other day(with the different carbs) and then after riding it bit more (me thinking it was dirty carbs) it was running lovely then it died when i went slow and 2 back fires then it started again etc

Cant really help, backfiring is sometimes caused with a flooded engine, the petrol igniting when it shouldnt.

Think I should pass lol.

[pastures16]

These engines are well known for stretching their inlet valves making cold starting a problem, my old one was like that, warm no prob but cold a right bastid. you really do need to compression check it first.

The high revving for no reason might be unrelated, poss poor throttle cable routing?, if you move the bars from side to side slowly when its idleing do the revs increase?

poss the carbs might need balancing but a compression check is first then take it from there. you can buy them on fley bay but check it has a small enough fitting for the bike.

as your the in house expert why does mine when i rev it is it real slow to come down on the revs sometimes it stays at 2k and dont like starting when warm cable is also free

Yeah iv noticed some times mine doesnt go back down to normal idling speed some times but i swear these bikes have a mind of its own i was drinking a cup of tea while the bike was idling and next min it went up to like 4-6k revs so quickly went to the bike turned the idling screw down a bit and it went back to normal :S now im thinking my carbs are dirty but wouldnt that make the bike play up loads more?

i do the same it will go to tickover the rev it again let it drop and it stalls