Experiences with Ivan Kit

[unfazed]

Have you removed the bottom bolt?

[jul1us]

I want to express my gratitude again to Mike and everybody here who helped me Ivanising my Fazer.


Just had a vacation in Sardinia and had a wonderful time with my Fazer!

[Falcon 269]

Looks like you had a brilliant trip.

Good to hear the Fazer is running well again after the troubles you had a while ago.

[dueruote]

Hi Everyone !!

I've installed Ivan standard kit about 6 years ago, I have since opened up the carbs two times to clean them.

The bike does run very nicely as everyone describes, but I feel it's like the equivalent of a modern bike which is always stuck in sport riding mode.
By this I mean, there is always lots of power available at every rpm, it's like the bike is always pushing me to go harder, when sometimes I just want a smooth relaxing ride.

I have trimmed down the diameter of the throttle cable pull on the right handle bar, and it help slightly.

Without having to take out the carburetors every time, would there be some other mod that can put the engine in "normal" riding mode (less nervous throttle response) ?

[Gnasher]

Not really without a good deal of work. Either less right wrist or remove the Ivan's and go back to standard, it would be roughly if not less than messing about with the Ivan's.

[Falcon 269]

Unfortunately, as these bikes get older, having to clean the carbs every few years isn't going to be unusual unless they are ridden regularly year-round. Variable quality fuel will also contribute to this.

Ivan's standard, ie Slip On, kit doesn't change the power delivery of the bike to make it any more aggressive. It just fills in the lower end and adds a bit to the midrange. Most owners I did this job for said that it enabled them to ride one gear higher, so if anything it made the engine less demanding to use.

With the stock end can, there's only a marginal peak power gain of perhaps 2 - 3bhp. With an aftermarket can, maybe 4 - 6bhp but that's at full throttle and doubt if the OP is using that.

It sounds from the OPs description that he's having to ride through flat spots to get to better power delivery higher up the rev range. That points to something amiss with the kit installation and/or gumming issues in the carbs.

Either way, I don't believe removing the Slip On kit will be the answer.

[Gnasher]

The way I'm reading this, he's saying it's too much power, the bike is running fine. Just too much for where/how he now rides, i.e. all the low/mid range the Ivan's puts back. If that's the case either put it back totally standard with all the holes in the power curve or perhaps he needs a different bike better suited to how/where he rides nowadays.

A fair few of my customers have moved to less powerful machines as, let's say they've aged.

[dueruote]

I'm not the OP but since OP's issue had been addressed, it still looked adequate to follow up given the thread theme.

I'm not complaining the bike has too much power, just wish it could be a bit softer in its delivery in the lower and mid range.
I have installed the slip on version of the kit and I  have also an Akrapovic slip on, but not the full exhaust.

By the way, I have drilled both bypass holes. 
At the time these were the most widespread instructions or perhaps I missed the feedback of drilling only one.
Is it a big issue ?  Could the engine run too rich with two enlarged bypass holes ?

In the end, I much prefer the engine as it is now with the kit.
I'm just talking about fine tuning, but no way I wanted to go back to how it was before.

Thanks !!

[PieEater]

....

I'm not complaining the bike has too much power, just wish it could be a bit softer in its delivery in the lower and mid range......

Do you know if you have an ignition advancer fitted, these can make a noticeable increase to low down pull but it's not night and day, and I doubt is related to your problem, but reverting to the OEM ignition plate if you have an advancer fitted should make some difference?

[dueruote]

Do you know if you have an ignition advancer fitted, these can make a noticeable increase to low down pull but it's not night and day, and I doubt is related to your problem, but reverting to the OEM ignition plate if you have an advancer fitted should make some difference?

It's the original pick up coil disc.

I was thinking maybe worth to try original diaphragm springs in the carburetors, or less aggressive length cut.

Also, the fact that I drilled both bypass holes is still in the back of my mind.
Can't say what impact that makes compared to drilling just one.

[Falcon 269]

There's no discernible difference in power output or delivery with either one or two bypass holes enlarged. Yes, it will run richer at idle with two done but that's about all. Don't sweat it.

I agree with your idea of trying uncut slide springs, although the main reason for doing this was to speed up slide response in the mid-throttle regime.

[dueruote]

There's no discernible difference in power output or delivery with either one or two bypass holes enlarged.  Yes, it will run richer at idle with two done but that's about all.  Don't sweat it.

I agree with your idea of trying uncut slide springs, although the main reason for doing this was to speed up slide response in the mid-throttle regime.

Thanks for your reply.

I think that will be an interesting job later for the winter !!!

Cheers