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Forum: 1986 - 2007 Ninja 250R Tech Talk Today, 10:33 AM
Replies: 78
Views: 1,188
Posted By DannoXYZ
Yeah! After being depleted by starting engine,...

Yeah! After being depleted by starting engine, weak battery won't have enough power to fully fire plugs. Nicer ignition systems adjust dwell (coil charge time) based upon battery-voltage. I doubt...
Forum: 2008 - 2012 Ninja 250R Tech Talk Today, 10:17 AM
Replies: 52
Views: 2,429
Posted By DannoXYZ
Yeah, 1-atm = sea-level or VE=100% @ WOT. Above...

Yeah, 1-atm = sea-level or VE=100% @ WOT. Above that is boost. Problem with 3-bar sensor is you lose resolution. With 16x16 map, you only have 5 rows for boost. But 3-bar sensor will only have 0.8v...
Forum: 2008 - 2012 Ninja 250R Tech Talk Today, 04:47 AM
Replies: 52
Views: 2,429
Posted By DannoXYZ
Also, is Engine Displacement, VAL_vEng supposed...

Also, is Engine Displacement, VAL_vEng supposed to be 124.994cc ?
Forum: 1986 - 2007 Ninja 250R Tech Talk Yesterday, 09:10 PM
Replies: 78
Views: 1,188
Posted By DannoXYZ
Means you've wasted tonnes of time doing stuff...

Means you've wasted tonnes of time doing stuff that doesn't make difference. Needs more objective, all-or-nothing, yes/no, black & white quantitative testing.

1. post photo of OEM needles compared...
Forum: 2008 - 2012 Ninja 250R Tech Talk Yesterday, 06:41 PM
Replies: 52
Views: 2,429
Posted By DannoXYZ
Something's definitely not right if you're not...

Something's definitely not right if you're not firing plugs in open-air. That's easiest condition. When you've got petrol and compressed mixture, that's much, much harder to jump spark across. Could...
Forum: 1986 - 2007 Ninja 250R Tech Talk Yesterday, 08:01 AM
Replies: 2
Views: 62
Posted By DannoXYZ
you are measuring AC voltage right? test meter...

you are measuring AC voltage right?
test meter by measuring wall socket.
Forum: 2008 - 2012 Ninja 250R Tech Talk September 20th, 2021, 11:03 PM
Replies: 52
Views: 2,429
Posted By DannoXYZ
Shouldn't be intermittent though. Everything in...

Shouldn't be intermittent though. Everything in engine is even and regular when cranking. Best to connect both ports to common LARGE chamber to even out pulses and sap their peaks. Something size of...
Forum: 1986 - 2007 Ninja 250R Tech Talk September 20th, 2021, 10:11 AM
Replies: 78
Views: 1,188
Posted By DannoXYZ
Yup, you're not getting enough extra petrol to...

Yup, you're not getting enough extra petrol to match larger volume of air ingested at larger throttle-openings. Carbs needs some more work to get back to factory-fresh clean condition.
Forum: 2008 - 2012 Ninja 250R Tech Talk September 20th, 2021, 10:01 AM
Replies: 52
Views: 2,429
Posted By DannoXYZ
yeah, too many changes at once. I would not use...

yeah, too many changes at once. I would not use the mixture screws, they're just an air-bypass around throttle-plate? Changing those would require changing maps as well. I'd keep those fully-closed...
Forum: 2008 - 2012 Ninja 250R Tech Talk September 19th, 2021, 05:11 PM
Replies: 10
Views: 188
Posted By DannoXYZ
no way, heads are completely different. Notice...

no way, heads are completely different. Notice that cams sit directly over cams on new-gen design.

New-gen bucket & shims are much more durable. Adjust it once very 20k-miles and forget about it....
Forum: 1986 - 2007 Ninja 250R Tech Talk September 19th, 2021, 05:06 PM
Replies: 78
Views: 1,188
Posted By DannoXYZ
means you are getting more air when slides open ...

means you are getting more air when slides open
BUT, you are not getting matching increase in petrol.
Something is wrong with carbs.
Forum: 2008 - 2012 Ninja 250R Tech Talk September 19th, 2021, 08:40 AM
Replies: 52
Views: 2,429
Posted By DannoXYZ
As test control, when you put old injectors in...

As test control, when you put old injectors in with old settings, does it start, run and idle OK?

Where do you have MAP-sensor plugged in? It needs to be between throttle-butterflies and...
Forum: 2008 - 2012 Ninja 250R Tech Talk September 18th, 2021, 07:44 PM
Replies: 52
Views: 2,429
Posted By DannoXYZ
1. what is new injectors' impedance compared to...

1. what is new injectors' impedance compared to old ones?

2. pull fuel-rail with injectors attached. Aim into small cups and crank for 10s. How much petrol did you collect each?

3. repeat same...
Forum: 1986 - 2007 Ninja 250R Tech Talk September 18th, 2021, 05:04 PM
Replies: 78
Views: 1,188
Posted By DannoXYZ
Yes try shimming needles to see if it improves,...

Yes try shimming needles to see if it improves, or gets worse. This would be useful data. Also do you have access to wideband-O2 with datalogging?


Oil-pressure relief valve may be clogged....
Forum: 1986 - 2007 Ninja 250R Tech Talk September 18th, 2021, 02:49 PM
Replies: 43
Views: 797
Posted By DannoXYZ
Heh, heh… hate it when that happens!!! At least...

Heh, heh… hate it when that happens!!! At least you got the cleaning done first! :)
Forum: 1986 - 2007 Ninja 250R Tech Talk September 18th, 2021, 09:04 AM
Replies: 26
Views: 867
Posted By DannoXYZ
So 300 exhaust hanger bracket lines up with...

So 300 exhaust hanger bracket lines up with pre-gen centrestand mount? That’s bizarre as in-between new-gen model didn’t have centrestand or even mount for it. I suppose Kawi has some common frame...
Forum: 1986 - 2007 Ninja 250R Tech Talk September 18th, 2021, 08:36 AM
Replies: 9
Views: 146
Posted By DannoXYZ
Exactly! Many expert mechanics have had to remove...

Exactly! Many expert mechanics have had to remove their carbs 4-5x to do ever deeper cleaning until bike ran right. It looks me over 40-hrs one time to do proper carb restoration until bike ran like...
Forum: 1986 - 2007 Ninja 250R Tech Talk September 17th, 2021, 07:51 PM
Replies: 9
Views: 146
Posted By DannoXYZ
“Cleaning” can mean different things to different...

“Cleaning” can mean different things to different people. Last house-cleaning outfit I used didn’t think that “cleaning kitchen” meant restoring top of fridge to showroom condition or pulling out all...
Forum: New Members September 17th, 2021, 02:41 PM
Replies: 7
Views: 111
Posted By DannoXYZ
Greetings & Salutations!!! :)

Greetings & Salutations!!! :)
Forum: 1986 - 2007 Ninja 250R Tech Talk September 17th, 2021, 12:41 PM
Replies: 43
Views: 797
Posted By DannoXYZ
Coming along nicely! Low-torque on...

Coming along nicely!

Low-torque on oil-filter is because you only need to compress rubber slightly to seal.

Igniter is for '88-94 bikes. Take picture of left & right cases of your engine,...
Forum: 1986 - 2007 Ninja 250R Tech Talk September 17th, 2021, 09:09 AM
Replies: 9
Views: 146
Posted By DannoXYZ
They need more work than that: - carbs needs...

They need more work than that:

- carbs needs to be disassembled down to every last nut, bolt and individual component

- everything soaked in ultrasonic cleaner

- secret hidden passages need...
Forum: Ninjettes At Speed September 16th, 2021, 06:20 PM
Replies: 17
Views: 536
Posted By DannoXYZ
Wow, where did you buy for that price? I want 10...

Wow, where did you buy for that price? I want 10 of them!!!

Amazing light thing huh? I had one on my race bike for 3-yrs without any problems. Then I transferred it to my street-bike and...
Forum: 1986 - 2007 Ninja 250R Tech Talk September 16th, 2021, 11:32 AM
Replies: 78
Views: 1,188
Posted By DannoXYZ
Some references: ...

Some references:

https://www.ninjette.org/forums/showthread.php?t=352293
Forum: 1986 - 2007 Ninja 250R Tech Talk September 16th, 2021, 08:49 AM
Replies: 78
Views: 1,188
Posted By DannoXYZ
That's correct. Height of slide corresponds to...

That's correct. Height of slide corresponds to volume of air going through carbs. It's fed and lifted by vacuum-port in front of carb-venturi. If you can confirm slides lift fully by redline,...
Forum: 2008 - 2012 Ninja 250R Tech Talk September 16th, 2021, 08:39 AM
Replies: 7
Views: 203
Posted By DannoXYZ
Safety wire's tough sh*t!!! There's no way it...

Safety wire's tough sh*t!!! There's no way it could've broken off inside carb. It was poked in too far and slipped in. Then wasn't or couldn't be retrieved, so they just left it!!! EEEeeeediots!!!
...
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