On, Off throttle

Read allot about this surging thing which mine never did and i certainly don't to stir all that up again.

What it did have was an ON, OFF throttle .(1250).Unlike the smooth transition of the carbureted bandit.Going down hill with throttle off
or nearly off it was like go ,stop , go .stop.,This would disappear if i clicked into a higher gear ,but that's not the gear i really wanted in the first
place.
I found if i got rid of all and i mean ALL the slack in the throttle cable (adjusted at the bar end)it was 80% better.
Now i don't know if mine came delivered like that (too much slack) or not,and if your old like me (59) we always had a bit of slack
in the cable .I've asked other people about it and they say they have never noticed it (on-off).
It's amazing how little you open the throttle on the daily ride(calm) I've been looking at it lately ,feels like 50mm actually is 5 to 8mm.
Try getting rid of ALL that slack,i found it much better ,not perfect ,but better.(something to be said for the old carby yet)

Or is there a better way i don't know about? My 1200 (carby) never did it.

gus wrote:Read allot about this surging thing which mine never did and i certainly don't to stir all that up again.

What it did have was an ON, OFF throttle .(1250).Unlike the smooth transition of the carbureted bandit.Going down hill with throttle off
or nearly off it was like go ,stop , go .stop.,This would disappear if i clicked into a higher gear ,but that's not the gear i really wanted in the first
place.
I found if i got rid of all and i mean ALL the slack in the throttle cable (adjusted at the bar end)it was 80% better.
Now i don't know if mine came delivered like that (too much slack) or not,and if your old like me (59) we always had a bit of slack
in the cable .I've asked other people about it and they say they have never noticed it (on-off).
It's amazing how little you open the throttle on the daily ride(calm) I've been looking at it lately ,feels like 50mm actually is 5 to 8mm.
Try getting rid of ALL that slack,i found it much better ,not perfect ,but better.(something to be said for the old carby yet)

Or is there a better way i don't know about? My 1200 (carby) never did it.

Also take out the sideways slop on the throttle by rolling an o ring into the gap near the bar end weight. About 2mm ring will do it.
I have always maintained the “issue” is an input issue and I’ve been booted off forums before for suggesting if your throttle control isn’t up to par it’s not the bikes fault.

I know what it is. It's the efi not being able to make up its mind if it should give you fuel or not .I believe Yamaha FZ1 are worse as are some BMW's
My Aprilia does NOT does this ,(but it did cost 7grand more so it shouldn't),so it is something that i am not causing, also if i loosen the throttle cable it gets worse.The Bandit is a bargain at that price and i love mine(1250) but the fueling is not perfect.The 1200 i had the fueling was perfect.If the efi was spot on power commander would go out off business.Have an o-ring in place ,like it.
Thanks for comment and suggestions always up for a bit of positive discussion.

There is much (and I mean much) discussion about this problem around the traps.
I too think the transition from closed throttle to slightly open throttle is quite harsh - remember back to the 1st gen VN commonwhores (esp the V6's), bloody horrible in the same situation especially from a standstill. Holden have done heaps (and I mean heaps) of work to get to a point where it is acceptable
Have a look at some of 2WA's vids you can sometimes hear the snatch/clunk as he rolls on the throttle (no offense to your riding style 2WA, just pointing out what I think = the problem)

Some of the harshness is caused by the high tork this engine has at such low RPM's compared to other bikes in this class (over 1 litre in line 4's) IMO

I had many issues early on with my bike concerning fueling and after much experimentation and much posting on forums have got it to a point that I'm almost happy. My acceptance and "riding around" the last little bit also helps.

Currently I have disabled my GP sensor (which can increase the transition problem in some cases) and increased fueling in the idle and 11% throttle opening and above ranges but left the poofteenth - 10% throttle open range stock. I do have some other plans in mind but I've been saying I'll get them done for ages and still haven't so who really knows if I ever will.

Could not have put it better myself.

This bike (1250) is very,very good, a slight glinch in the fueling is not going to change my mind on that.

No offence taken mate. I'll have to have a closer listen myself lol. Some of the snatch is chain slack. It's outside spec but I think the specs are to tight. The B1250 is smoother than any other big I4 I have had including other Suzuki's. I'm still not convinced its an inherent problem but a TB/Sync at 24,000km that goes bad might have me convinced.
I am surprised at how agricultural the gearboxes sound on these.

I had the on off when i first bought it but after looking at many other suzuki forums i got the answer i needed. when you are in diagnostic mode and bike is idling the display should be -coo. but you want to adjust it to the upper range so as soon as you even slightly touch the throttle the line jumps to the top.. This fixed my problem. it is a pleasure to ride around town

Did sunstate do that for you? All this code stuff leaves me looking like

Nah did it myself. its not that hard to do . the only tool you need is a tamperproof allen key set. if you are interested i can right up a do it yourself thing with pictures( i think there is one on the site somewhere already) or im always up for a ride and can come have a look at it with you

I'll take you up on that .I read about it somewhere but got I'll be in touch.

clicky here

for those with SDS or the healtech OBD tool, the TPS should be 27.9 or close to it at idle/closed throttle.
Remember to create a bunch of slack in the throttle cables when setting the TPS so you don't get a false reading.

I make surfboards for a living.If i could understand all that i wouldn't have too.


I'll have another read after a good Lay down. Thanks for the post.

Did you manage to have a look at it Gus?

I did , know realise i sent an e-mail question to the wrong place so I'll repeat it hear.
In the second photo there's a wire inserted into the plug.
Is that wire shaped like U or two wires like II (not connected)

will be a U shape gus.

How many km you have on the bandit?

holdenman wrote:will be a U shape gus.

How many km you have on the bandit?

31,000k. This has never been checked (Previous service, difference of opinion)


Thought it must be a U but didn't look like it in the pic.
I'll check it in the morning

I was going to recommend doing a throttle body sync at the same time.

i have a day off tomorrow so if you are keen send me a pm

It is a split pin that I have taped the end up on so as to reduce the chance of a short on any metal parts. IN reality should never happen, but can't hurt to be carefull.

Holy heck, back here in kindy, I'm still pushing my cuisenaire rods around!

Might take up knitting after all!!!!!

Big thanks to HOLDENMAN who i had never meet before.Rode 150k in the rain to adjust the efi on my bike .
Wouldn'T take any payment and to me made something complicated look easy.Already idols better ,waiting for it
to stop raining before test ride. Here is the man in action.Thanks again H,

Finally stopped raining so I took bike out for test ride . What i was hoping for was a slight improvement, what i got was
the problem completely sorted. This is how the bike should have been from new but never was.I can now roll on and off
the throttle without it being jerky. Thanks for everybodys help. Got to love a happy ending.

More then welcome Gus.
Im glad it all worked out good

cheers

Go back to page one and read down posts until you see CLICK HEAR.Looks complicated until someone shows you, then it starts to make
sense .Do have to have vac. gauges though.I got lucky with holdenman to do it for me.

Having said that not all bikes seem to do it .I asked other bandit riders about it and they had never noticed it.(on,off)