Ivans jet kit Help!

[lingy]

Fitted the ivan,s kit and balanced the carbs, no problems at all.
But what i do have know is a very slight surging at low revs when just idling alone at say 30/40 mph. Every thing else spot on and as I say it is very slight but was not there before fitting the kit, is this the norm.
Any experts out there.

[sadlonelygit]

Uh~oh!

[Falcon 269]

Please be more specific with the symptoms. 

Gear, throttle position (ie, closed, barely cracked open) and exact rpm.

What Ivan calls a 'loping idle' (ie, a very minor fluctuation at tickover) is not unusual but what you've described so far doesn't sound right.

[lingy]

Yes it has the loping idle but as you say to be expected.
 
To be more specific, it only happens at low revs say 2500 to 4000 gear selected does not seem to matter it does it in all gears at these revs.
The throttle position is barely cracked open just pottering along. Again its is a very slight surging but its there, get a bit pace on and it not noticable at all.
 
 

[red98]

go back and balance the carbs again 

[sadlonelygit]

stop pottering............sorted.
you did drill the correct holes?
how much did you take off the springs?
you did seat the needles properly
you didn't lose an O ring.
diaphragm not seated properly
if it's that much of an issue, i'd strip out the carbs again and double check everything

[lingy]

Sure all of the above are Ok this was carried out with 100% attention to detail.
 
Followed Mikes instructions to the letter and double checked everything before and during assembly.
 
Maybe its just normal, as I said it is very minor but was 100% not there before hand.

[VNA - BMW Wank]

Mike fitted mine, so I can't help with fitting and set up.

But one of the big things I love about the kit (mine was the slip on kit) is that it pretty much cures the bike of the horrible low rpm constant throttle surging issues that the standard bike has.  I used to knock it down a couple of gears for 30mph through towns, now it just stays in 6th.

So should be much improved, not worse.

[lingy]

Forgot to mention its still running with std exhaust should have end can replaced shortly not sure if this affects it.
 
 

[Falcon 269]

Don't know if you've ever tuned 2-strokes but does the term 'motor boating' mean anything to you?

If you've slightly over-enlarged the pilot bypass holes, on a closed throttle at low rpm you might get something which is best described as a sort of gurgling in the intakes.  Sounds like something's out of whack but the instant you crack the throttle, everything cleans up and the motor pulls clean and true.

Sound familiar?

[lingy]

Took it out yesterday, in the wet, and gave my mate a go as I had a feeling it was maybe me being to picky.
He said thats nothing at all he could hardly notice it, so thanks to every one for the replys Im just going to enjoy it know and put it to the back of my mind.

[tomlinscote]

Intriuged by Mike's post on motor boating I decided to google it, mmm I'm not sure what I found was what he was on about and I'm guessing it involves more than 2 strokes!!
Glad you are now happy with your bike, I have yet to go down that route as mine seems to pull ok as it is......
 
P

[lingy]

What year is your bike, it may be as previously posted the biggest differance is noticed on earier bikes.

[lingy]

Well just thought I had better give an update to where I finished up with this one.
Two thing I did to the bike 1. rebalanced the carbs and 2. Fitted a werx end can and link pipe.
Took it for a 150 mile run and no problems at all surging completely gone.
Noticable differance with the jet kit,
Pulls like a train throughout the rev range and a definate increase in top end rush.
Good example my mate has a zrx1200 both opened them up at around 60ish slightly pulled away then woosh gone as the revs built up did have the advantage before but not as noticable as this.
Mileage, yes slightly less to the tank but not significantly so, this was a bit of a suprise, I am talking about 15ish miles less.
Oh another thing which is a bit addictive and will no doubt get me into trouble at some point, pull away in first open the throttle and as the revs rise it just simply lifts the front end, no blipping of throttle or use of clutch, didnt do this before.
 
Only down side erractic tick over which is more of an annoyance than anything. Tends to be a bit low when warm and choke off and a bit high when engine hot, but can live with this.
 
Overall if youve nothing else to do with your money, well worth it.
 
Next project suspension.   
 
 

[Falcon 269]

Try setting the TPS so that the tacho needle is flicking between 5 & 10k rpm, not solid on 5k as the manual suggests.

Idle rpm when warm should be 1250 - 1300rpm with Ivan's kits.