ZXR250c hard starting etc

[fricks]

I opened the fuel tap by pulling the plate off the back of it and look clean to me. Wasnt sure how much further i could pull it apart though...

[skidMark]

Just checked for this box and cant see anything which could be remotely like it. On the inner left hand side frame rail (between steerer tube and horizontal bar by coils) there are 3 tabs welded on. Looks as though something is supposed to be sitting in there. Im geussing this is where it should be

Yep you do need one...

strange that its run without it.... how high have you revved it, you want to be getting it upto 17-18k rpm a ouple of times a week at least or it'll run like a sak of shit, sometimes you just have to give them a good thrash to blow the cobwebs out if you ride them low in revs all the time they do run like crap.

[fricks]

Its been revved to 17-18k before. Do you know if it is possible to bypass this valve somehow which could explain why its been running fine without it?

Im on the hunt for one at the moment, but I dont really know what they look like and the places ive enquired about one dont seem too 100% sure what im talking about which is making it harder.

Any ZXR owners out there able to do me a favour and quickly whip their tank off and grab a photo for me please?

[Benk]

What was the problem again Shaun?

[skidMark]

Its been revved to 17-18k before. Do you know if it is possible to bypass this valve somehow which could explain why its been running fine without it?

Im on the hunt for one at the moment, but I dont really know what they look like and the places ive enquired about one dont seem too 100% sure what im talking about which is making it harder.

Any ZXR owners out there able to do me a favour and quickly whip their tank off and grab a photo for me please?

I would doubt it is your problem if it has run fine up until now without it, but you should have one, i have never found a way to bypass it, it balances between the carbs and the airbox.

i think you should take your bike for a decent fang and wind it right up 10 times at least...

will probably come right.

[fricks]

Well it seems to be running fine now. Goddam fuel filter seemed to be the culprit! The fuel wasnt flowing through it properly. Removed the filter and after a little cranking it fired up and was running fine. Benk took it for a ride around the block and ran mint.

May have been an airlock or something inside the filter and wasnt letting the fuel flow into it. It probably would have been a long time before i would have thought to check the filter if it hadnt have been for the flatmates giving me a hand and going back to check the basics!

Thanks to Skidmark and co. for the help and suggestions

[skidMark]

Well it seems to be running fine now. Goddam fuel filter seemed to be the culprit! The fuel wasnt flowing through it properly. Removed the filter and after a little cranking it fired up and was running fine. Benk took it for a ride around the block and ran mint.

May have been an airlock or something inside the filter and wasnt letting the fuel flow into it. It probably would have been a long time before i would have thought to check the filter if it hadnt have been for the flatmates giving me a hand and going back to check the basics!

Thanks to Skidmark and co. for the help and suggestions

sweet.... but one day i'm taking ya tank off!!! i wanan see how somebody bypassed the airbox to carb thingymadoodle........ means i can run pod filters.... hi five!

[fricks]

No worries mate, more than welcome to come by and check it out next time your in Tauranga

[skidMark]

No worries mate, more than welcome to come by and check it out next time your in Tauranga

it smells funny there

lol sweet as man will pm ya when im heading that way.

[Benk]

it smells funny there

lol sweet as man will pm ya when im heading that way.

Whats the point of a pod filter?

[Dealer]

Whats the point of a pod filter?

To look pretty. oh and increase the airflow by 0.2%

[Benk]

Itd decrease cold air airflow if you removed the airbox though?

[tychver]

Itd decrease cold air airflow if you removed the airbox though?

On a fully faired bike this is normally true.

On an unfaired bike it'll make more power with a pod filter or open carbs until about 150kph. Much above that and you need to find some stiller air.

It's common practice on certain bikes to drill holes the the airbox lid to get some extra flow and run a pod filter mounted inside them.

I run a pod an no airbox on my cb250rs. Only now I have to find a bigger jet or I'm going to melt the piston. It was already running lean up top.

[Sparrowhawk]

Well it seems to be running fine now. Goddam fuel filter seemed to be the culprit! The fuel wasnt flowing through it properly. Removed the filter and after a little cranking it fired up and was running fine. Benk took it for a ride around the block and ran mint.

May have been an airlock or something inside the filter and wasnt letting the fuel flow into it. It probably would have been a long time before i would have thought to check the filter if it hadnt have been for the flatmates giving me a hand and going back to check the basics!

Thanks to Skidmark and co. for the help and suggestions

Those fuel filters have a lot to answer for. I had some similar probs a coupla months ago. Previous owner had fitted an inline filter, using radiator hose. Of course the rubber perished and clogged the filter. Got rid of it, put fuel hose in instead, no probs since.

Might be worth checking what sort of rubber hose you've used, coz the fuel will degrade radiator or air hose.

[Benk]

On a fully faired bike this is normally true.

On an unfaired bike it'll make more power with a pod filter or open carbs until about 150kph. Much above that and you need to find some stiller air.

It's common practice on certain bikes to drill holes the the airbox lid to get some extra flow and run a pod filter mounted inside them.

I run a pod an no airbox on my cb250rs. Only now I have to find a bigger jet or I'm going to melt the piston. It was already running lean up top.

Cheers. This makes good sense.