Flat spot at 1/4 to 1/2 throttle?

[unstuck]

16 needle jet, 19 main jet, 17 emulsion tube, 13 needle.

[nzspokes]

16 needle jet, 19 main jet, 17 emulsion tube, 13 needle.

Yes, now you've got it. Replace that lot.

[nzspokes]

. .

IKR. Some people love to spend money with below par mechanics or not work out problems and change things blindly.

[unstuck]

IKR. Some people love to spend money with below par mechanics or not work out problems and change things blindly.

So you have never changed a part that you thought was the problem, to find in fact it was only part of the problem?. Why are you not working for a formula one team.

You sir are God.

[nzspokes]

So you have never changed a part that you thought was the problem, to find in fact it was only part of the problem?. Why are you not working for a formula one team.

You sir are God.

I have indeed done that. But I have not charged others for faulty diagnosis.

[swbarnett]

Quick update: The problem is 100% fixed. Thanks to Spanner Spinner for the solution.

[swbarnett]

Quick update: The problem is 100% fixed. Thanks to Spanner Spinner for the solution.

A furhter update - about 10,000k later and the problem has returned. Any more suggestions?

[husaberg]

A furhter update - about 10,000k later and the problem has returned. Any more suggestions?

Order same parts..........bemuse how the quality of parts has diminished.

http://www.factorypro.com/Prod_Pages/prods14.html

You are lucky your needle jets are replaceable, as on some Keihins they are not.
Failing that make your own.

[nzspokes]

Order same parts..........bemuse how the quality of parts has diminished.

http://www.factorypro.com/Prod_Pages/prods14.html

You are lucky your needle jets are replaceable, as on some Keihins they are not.
Failing that make your own.

My thoughts exactly.

[swbarnett]

Order same parts..........bemuse how the quality of parts has diminished.

Are you saying what I think you're saying? That, although the original parts lasted a good 100,000km before crapping out the new ones are worn out after only a tenth of that?

http://www.factorypro.com/Prod_Pages/prods14.html

I take it these are a stronger part and shouldn't wear out so fast?

Failing that make your own.

If only. I wouldn't kno where to start and wouldn't have access to the necessary tools if I did.

Although I love the bike I'm starting to think it may be time to say good bye and trade it in for a VFR.

[nzspokes]

Are you saying what I think you're saying? That, although the original parts lasted a good 100,000km before crapping out the new ones are worn out after only a tenth of that?


I take it these are a stronger part and shouldn't wear out so fast?


If only. I wouldn't kno where to start and wouldn't have access to the necessary tools if I did.

Although I love the bike I'm starting to think it may be time to say good bye and trade it in for a VFR.

So when a bike needs servicing you give up on it?

A VFR will cost a lot more to service.

[husaberg]

Are you saying what I think you're saying? That, although the original parts lasted a good 100,000km before crapping out the new ones are worn out after only a tenth of that?.

That appears to be the case.

I take it these are a stronger part and shouldn't wear out so fast?.

I can't say for sure if they are, but why not investigate and google them.

If only. I wouldn't kno where to start and wouldn't have access to the necessary tools if I did.

Although I love the bike I'm starting to think it may be time to say good bye and trade it in for a VFR.

If you want to trade it in you will still need to fix it or get less money for it,wouldn't you?
If is the needle jet just worn, why not have a go at filling them up with bronze and re-drilling them. Realistically what do you have to lose.
I think you will find the cost will be less than a beer.
Last time you fixed it did you also replace the needles or not?

Last cr500 I had has similar issues, the jets are unable to be replaced, The simple bodge cure is a needle with a wider profile at the poont of excessive richness .........it doesn't "fix" the problem, but it does mask it pretty effectively.

[swbarnett]

So when a bike needs servicing you give up on it?

This is not just a matter of servicing. The last time I had this done it cost $800 by the time the labour was added on.

A VFR will cost a lot more to service.

Why would a VFR cost more to service? They're both four cylinder engines?
Even if it does, I doubt it sould be $800. For me that amounts to over $50 a week.

[swbarnett]

That appears to be the case.

Yeah, that's what I couldn't quite bring myself to believe.

I can't say for sure if they are, but why not investigate and google them.

Indeed I will.

If you want to trade it in you will still need to fix it or get less money for it,wouldn't you?

Of course. But I would hope that anything I would trade it for wouldn't have this problem. Especially as the VFR doesn't have carbs.

If is the needle jet just worn, why not have a go at filling them up with bronze and re-drilling them. Realistically what do you have to lose.
I think you will find the cost will be less than a beer.

This is way beyond what I'm prepared to attempt.

Last time you fixed it did you also replace the needles or not?

Both were replaced at the same time.

[husaberg]

Yeah, that's what I couldn't quite bring myself to believe.


Indeed I will.


Of course. But I would hope that anything I would trade it for wouldn't have this problem. Especially as the VFR doesn't have carbs.


This is way beyond what I'm prepared to attempt.


Both were replaced at the same time.

Ok just to replace the needle jets is a doodle. but while the carbs were open I bet they replaced plenty of other stuff likely did a tune and balanced the carbs etc.
Your time however is free.
Easy to do yourself too, bet there will even be a video on youtube.

If I remember rightly certainly, the older katana's were time consuming to get at stuff.

The VFR will likely cost more to service as it is a V. So two covers to take off etc etc.
think they have Vtech now too, as well don't they?