Pushed to the limit

[Mikkel]

Hmmm, tried to take the fuel tank off to get to the air filter.

No luck - the fuel tap was free flowing and there was crap/rust in the petrol.
Guess I got a good place to start out from now!

[L.L. Cool M]

Sorry, I can't help you with this, but I just wanted to say I have the exact same problem. It's a bit un-nerving when it happens mid corner at speed!

Please to inform if you find the problem/solution. Cheers and good luck.

[The Pastor]

Sorry, I can't help you with this, but I just wanted to say I have the exact same problem. It's a bit un-nerving when it happens mid corner at speed!

Please to inform if you find the problem/solution. Cheers and good luck.

he has, it was rust in the tank causing a reduced flow rate.

now how to fix it, im sure somone on here said if you put a bit of gravel in ur tank with 1L of gas and swish it around it will get rid of the rust. but im not sure if it was a p/t?

[Kickaha]

I think I've now managed to push my ZXR250A to the limit... And needless to say - I want to go faster still!

Any idea of your lap times?

[Mikkel]

Any idea of your lap times?

Not really no. I don't think anyone has timed one.

I'm not saying that I can't go faster on the 250 ccm - sure I can. But the amount of strain I put on the bike to go as fast as I do now will make it wear out pretty quickly I think.

There's heaps more I can learn - also on a 250 ccm, but I'd like to maintain the value of the bike I have now by not blowing it up.

[imdying]

It's not so much of a lap time issue, more of a bike is getting raped constantly issue. Even if he weren't lapping faster, something like an old GSXR600 wouldn't need to be beaten into the red line quite as much. Typically I wouldn't be recommending a GSXR600 for someone who has been riding for less than 6 months, but I'm quietly confident that in this case it will be the correct step.

Yes, a ZXR250 will most likely take a beat all day every day, but there doesn't seem to be much point in buggering it 'just cause you can'.

If racing interests you, then perhaps an SV650 would be a nice choice? Of course, racing has other associated costs, not just a bike, so depends on if you've other obligations and a reasonable income to utilise in such adventures.

Cheap, local, give it the learn mate.

[skidMark]

I guess that both simplifies matters and makes it cheaper...

Wire in a cheapy fuel pump, see if that fixes it.

Strange that you havnt had the problem ever before.

• Get the carbs cleaned
• Clean your fuel filter in the gas tank
• If you have an inline fuel filter replace it.
• Plugs are buggered.

SM

[skidMark]

Not really no. I don't think anyone has timed one.

I'm not saying that I can't go faster on the 250 ccm - sure I can. But the amount of strain I put on the bike to go as fast as I do now will make it wear out pretty quickly I think.

There's heaps more I can learn - also on a 250 ccm, but I'd like to maintain the value of the bike I have now by not blowing it up.

Yeah don't go full balls to the wall.

I was pushing way too hard thrashing the hell out of the poor thing, too much adrenalin just trying to see how hard i had to push before the bike would crash.

I didn't crash but my poor wee motor went bang.

[Nagash]

Yeah don't go full balls to the wall.

I was pushing way too hard thrashing the hell out of the poor thing, too much adrenalin just trying to see how hard i had to push before the bike would crash.

I didn't crash but my poor wee motor went bang.

Soo... you're agreeing with him?

It would of been a hell of alot easier to just say, "Yes, I agree. 10 Char"


Unless there was a hidden message in there?

[skidMark]

Soo... you're agreeing with him?

It would of been a hell of alot easier to just say, "Yes, I agree. 10 Char"


Unless there was a hidden message in there?

I prefer to put effort into my posts rather than say the minimum needed just to raise my post count.

SM

[Mikkel]

Anyway, I'm pretty confident that it's a crap/rust in the tank issue. I drained the tank into a jerry can today.
Took the tank off and cleaned the air filter.
Removed the fuel tap (which was free flowing as opposed to working properly)
Shook the tank around a bit and could hear something moving around in there.
Got a small LED light and got some light into the tank to take a peek.
There was all sorts of crappy rust AND a weird little piece of plastic tubing.
Turns out the plastic tubing was supposed to sit in the tap assembly.
Went fishing with a slightly modified wire coathanger and got it out of there.
Then I chucked some small aquarium rocks into the tank and gave it a good shake.
Then I flushed the thing with water (dunno if that was dumb, but now it's done)
The tank is now sitting on the deck to dry - then I'll apply Jim2's vacuum method to get the last rocks out.

I also took the tap assembly to pieces and it didn't look too bad.
Flushed the crap out of it and reassembled it.
Chucked the piping that had come loose back in.
Now I'll just have to wait and see if that was indeed part of the problem.

Anyway, replaced the inline fuel filter and it was FUCKED. I'll try and chuck a picture up of a new and the old...

All in all I hope this will help to get it sorted.

It's not so much of a lap time issue, more of a bike is getting raped constantly issue. Even if he weren't lapping faster, something like an old GSXR600 wouldn't need to be beaten into the red line quite as much. Typically I wouldn't be recommending a GSXR600 for someone who has been riding for less than 6 months, but I'm quietly confident that in this case it will be the correct step.

It's almost been 6 months now Looking forward to getting at my 6R!

[Sully60]

Number one had a ZXR back a few years ago that vacuum locked in the fuel tank. That would just misfire until it stopped, open the cap to check it hadn't run out of fuel and the problem disappeared.
Might be worth an investigate of the tank breather route. I have seen this on other Kawkas also.

[imdying]

Mike, if you experience some rough running post putting water in the tank, you'll need to add some meths to it to remove it. If you search these forums, you'll find posts the detail the procedure.

[Mikkel]

Mike, if you experience some rough running post putting water in the tank, you'll need to add some meths to it to remove it. If you search these forums, you'll find posts the detail the procedure.

Ok, I was mostly concerned with corrosion.

I was planning to let it sit and dry overnight - and then put it all back together tomorrow. (Or perhaps even take the tank to a panel beater to see if they can fix the rust issue in the tank properly.

I thought you'd be on your way to Duvauchelles at this hour...

[Renegade]

make sure you blow out all your lines with compressed air to get any gunk out before re-assembly, i dont think a panel beater will be able to fix the rust in the bottom of your tank some how, you can only clean it out as best as you can and make sure all the plumbing is free flowing as it should be, be interesting to see how it goes after ward.