Jim you want a medal the size of a frying pan for your patience on fettling this nightmare problem 🙏🙏
@carleddison7479
14 сағат бұрын
Can you imagine the discussions between Jim and Allen Millyard? Absolutely no one would know what they would be talking about, but the results would be magnificent!
@SuperbikeSurgeryTV
12 сағат бұрын
I don't have heroes, but Allen Millyard! F.....me what a legend.
@throttle-up
10 сағат бұрын
Put a little prox switch on the choke lever to bring in the start resistance
@Cromwell648
Сағат бұрын
Don't be ridiculous, Jim hasn't a fkn clue about what he's talking about.
@Cromwell648
Сағат бұрын
Don't be ridiculous Jim doesn't have a fkn clue about what he's talking about..
@laurencehastings7473
20 сағат бұрын
Brilliant Jim. I'm as thick as a plank, don't know sod all about electronics but still understood the nature of the problem, the diagnosis, the remedy and how you got to the optimal resistance value. I personally think that the switched solution would be the most practical, similar to the good old choke lever from days of old, when knights were bold and electroics weren't invented. You choked your horse with no remorse until it hypervented.
@rafaellastracom6411
19 сағат бұрын
Your customers don´t know how good they have it. Outstanding stuff.
@dbx3197
19 сағат бұрын
Jim, really interesting. I’m guessing the engine temp sensor is an NTC (negative temperature coefficient thermistor) which starts high resistance at low temp and the resistance drops as the temp rises. I would expect that you can get sensors with different slopes so that you can have the high resistance you need at cold but drop to a resistance level low enough to hit your injector pulse width target at running temp. Alternatively, you could swap the fixed resistor in the loom for an NTC which would switch to low resistance as the bike warms up. Just a thought but top diagnostics as always!
@mickleblade
18 сағат бұрын
You beat me to it!
@seanmoore8152
18 сағат бұрын
"Get to the point Jim" ha. This is my favourite you tube channel. You sir are really good at what you do.
@ragnarironspear1791
10 сағат бұрын
No notification Jim today , but brilliant as always. Ive been building bikes and fixing them for 35 years and i still learn new things watching you 👍🏻👍🏻
@kev.c.j.
15 сағат бұрын
Fair play Jim! Auto Electrics are like herding wild cats so I duft my hat to you sir. I totally get why its taken such an in-depth and serious amount of time to understand, figure it out and find a solution. 👏
@notsohairybiker
17 сағат бұрын
Jim, It's the best fix because it works.
@jackjones8552
20 сағат бұрын
Loving the weekly uploads, hope the channel stats are reflecting the effort you are putting in
@cabbage681
13 сағат бұрын
That's a very clever sticking plaster 👍
@travismoan6168
5 сағат бұрын
Those mirror bolts, and the screen bolts are driving my OCD crazy. Top job on the cold start fix Jim.
@Busaboy1300
18 сағат бұрын
Wow.your knowledge is unreal.i must admit,I do listen to every little waffle you do.brilliant video Jim.
@brian623
15 сағат бұрын
You are such a clever person. I love taking things apart and putting them back together which I’m more than capable of doing but understanding what you’re telling me doesn’t mean the thing.😊
@waynep4256
12 сағат бұрын
You, Sir, are amazing. Well done. I've really enjoyed watching and almost felt like I was in the workshop with you. If I had a quarter of your knowledge, I would be a happy man.👍👌
@grahamhill9770
18 сағат бұрын
Top job on that one... I would be more than happy with that result as a customer. I really enjoyed this full on techy investigation... Followed you all the way. Before you mentioned my thoughts were a cold start resistor switch array, but you got with a single resistor on its own. Hat off to you fella a top effort indeed.
@derrickmanning2597
19 сағат бұрын
Hi Jim,it's not waffle buddy it's information! I jumped in about 2 seconds before you and said slap a resistor in the lead,to alter the cold end. No idea how I came to it unless I paid attention! I do RC trucks and have to do silly stuff to make things how I want them on electronics,still learning but enjoy your methods mate,cracking bike and even better tech!
@Bunter1815
20 сағат бұрын
Loving your work. Just a tip, when graphing it's normal to put the thing you're controlling (in your case ohms) along the horizontal and the thing you're measuring (pulse width) on the vertical.
@motorbikesandhacks
17 сағат бұрын
Fantastic investigation and a neat "hack" to work around a complex problem! Inspirational, educational and awesome.
@bigstevemex
19 сағат бұрын
Hi Jim Love your videos,keep waffling,we all learn things from it.why not see if you can find a variable resistor to wire into the plug you’ve fitted,you might even be able to fine tune it while it’s running.I remember doing something similar many years ago on rover turbo to trick the ecu into providing higher fuel pressure and boost. Obviously you can imagine the eventual result😂😂 Steve
@999fugazi
12 сағат бұрын
Above and beyond. Amazing work Jim and thanks for filming this journey
@iancharlesworth3654
13 сағат бұрын
You are the BOY Jim. Well done you. Very interesting. THANKYOU. 👍👍👍
@derekm6236
17 сағат бұрын
Brilliant worked and freely shared with us all. I wonder how few mechanics are capable of diagnosis and fix like this???
@samh3145
14 сағат бұрын
Excellent diagnosis, what a journey
@AlfOfAllTrades
15 сағат бұрын
Excellent info, excellent "waffling", and a great result. Very interesting conclusion to a weird issue.
@peripheral1258
13 сағат бұрын
Magnificent perseverance with the link between engine temperature and how the thermostat determines fuel pulse width and rich or lean... I hope to find a mechanic like you before I actually need one. Wait. Wait!! How about taking us for a test ride on an obvious example of a really cool bike... that needs a good spanking test blaaat !! ps: I don't know a fart about this stuff but likes what that dbx guy said...
@drmark5526
17 сағат бұрын
Beautiful solution Jim. I don't know tiddlywinks about the electronics, but I know a brilliant fix when I see one. Keep up the waffaling 😜 Mark
@GaryInch-e7p
15 сағат бұрын
Fantastic Fix, I'd be delighted with that progress...... cold start switch is a great solution, great channel, by the way.....
@malccolliver4721
14 сағат бұрын
Jim that was the bollocks top job. 👍👍👍👍
@TheDervMan
19 сағат бұрын
Jim, you're brilliant. Loved the video, loved the troubleshooting and loved the faffage. Thanks for sharing your knowledge.
@ohboy2118
19 сағат бұрын
This is only my opinion but if you have to pull the choke then flicking a coldstart switch would be my preferred solution so that you aren't potentially changing the hotstart/running performance. Jim, I loved the cause /effect diags. Please stop apologising for yourself. I like the talk outloud (waffle as you call it) because it helps me understand your thought process and gives me an insight into all the years of experience you have locked away in your brain. You are who you are and no apology is required!👍
@SuperbikeSurgeryTV
17 сағат бұрын
Thanks for the kind words 🙏
@malcolmdobson1244
16 сағат бұрын
spot on...keep it going..say what you think.
@kevowski
20 сағат бұрын
Amazing skills used to identify/ rectify the issue. Thoroughly entertaining to watch, thank you for sharing 👍🏻
@stevenhoward8792
15 сағат бұрын
Hi Jim, brilliant video and very informative, I love your explanations and visual content, your knowledge is second to none and your videos in general are very interesting and informative, I'm quite nieve about electronics contained within the workings of a motorbike engine, I watch your videos for enjoyment, entertainment and about all gaining some basic knowledge, great job Jim.
@martinatkinson7893
14 сағат бұрын
That has fried my brain Jim!😂 Brilliat work though!👍
@devious17
19 сағат бұрын
Well Done, Jim!
@markaddy53
13 сағат бұрын
great work as always lad looks like youve sorted it well done next video please
@dalemeadows225
19 сағат бұрын
Loved this series, good job Jim 🫡
@hsg288
19 сағат бұрын
Well explained , great fault finding .
@roberthall9483
18 сағат бұрын
Hi Jim,just finished watching all your videos, very interesting to watch as an ex mechanic, arthritis in hands, you remind me of myself but with less swearing ps bought a t shirt so you can put that deposit down on a big yacht or whatever else floats your boat,all the best,Rob.
@SuperbikeSurgeryTV
17 сағат бұрын
😂 Thanks Rob 👍
@stevepacitti9206
12 сағат бұрын
You've excelled yourself Jim! What a great series of videos. And I've learned something about fuel injection systems and how ECU's and associated components modulate engine performance. Thanks very much for taking the time to expain your thought process during your diagnosis, fascinating stuff.
@BuZZarDFPV
20 сағат бұрын
in case you didn't know, you can boil potted electronics to soften the epoxy to a point it peels out like rubber.
@ianmurray3820
14 сағат бұрын
Fascinating video Jim, I’ve watched all of them and wondered what the combined resistance of the air temp sensor/ water temp sensor were, and whether the ECU. Measured both on the cold start, - only because water sensor was in range and the ecu needed such a massive rise in resistance before it kicked more fuel in.!!.????? Just a thought..!!!👍
@MarkOneMoto
11 сағат бұрын
Really enjoyed this little series Jim..fascinating to watch the diagnosis and hats off to you. I understood perfectly what you were saying although I do have some electronics background to be fair, but even if I hadn’t, I think you did a great job of explaining the issue and the fix mate..well done 😀👏🏼👍
@darcylandry4669
10 сағат бұрын
Well done Jim! I really enjoyed this series of videos.
@alepaz1099
16 сағат бұрын
"Get your thoughts together before you open your mouth" that's sound advice 👍 i think that putting a switch to connect the extra resistor on/off would be a better hack (there seems to be something going on on the ECU) 🤷♂
@nickrider5220
20 сағат бұрын
Great work, understood everything and was a good watch - thanks Jim 🍻
@carlhansen8668
20 сағат бұрын
Great video, I love these videos every Friday 😀
@mickl8212
15 сағат бұрын
So on an ECU, you've basically done a fuel temperature injector offset correction to attain the correct amount fuelling by adding that resistor.
@derbyjohn972
15 сағат бұрын
Not a clue what you were talking about Jim 😂. But you are a legend and love a waffle mate 👍🏻
@MrDuhfactor
12 сағат бұрын
Wow..... unreal..... well done man.....
@davidashton9580
Сағат бұрын
Well done Jim, nice one 👍
@PurpleripplerTTV
17 сағат бұрын
Been binging your old videos waiting for a new one haha.
@BettaGettaBretta
14 сағат бұрын
Legendary diagnostics
@vladoovg
20 сағат бұрын
The ECU likely has old and dried-out capacitors. You can add three-position micro switch to the choke mechanism.
@basilwatson1
18 сағат бұрын
this is cropping up a lot me thinks its how to remove that potting Ive tried the boiling water trick no luck !
@julianwilson5468
12 сағат бұрын
Yep, best explanation I can think of. Lucky it hasn't failed, but I suspect it's on its way to failure.
@johnmoylan7202
17 сағат бұрын
Brilliant outcome, very well done very educational to me. Also a great introduction for me to the value of an oscilloscope an.d what it can tell you
@nicholastaylor1546
16 сағат бұрын
Awesome series thank you
@jimallen199
2 сағат бұрын
Cheers Jim very interesting series I think you would one very few who could have found a work around for this. Most would have said it need s a new ECU, if they were able to figure that much out.
@julianpalmer4674
19 сағат бұрын
Jim I think the temp sensor is out of tolerence, have a look at NTC thermisters, at 25 degrees 5K increasing to 10K at 10 degrees and dropping to 460ohms at 100 degrees.
@vincenttill8051
19 сағат бұрын
Exactly, this is what I would do and just machine a brass insert for the rad to pot the thermistor in
@SuperbikeSurgeryTV
17 сағат бұрын
That's interesting 🤔
@graemerichmond1425
9 сағат бұрын
Agree…use an NTC epoxied to the radiator
@roberthall9483
17 сағат бұрын
Denshigiken sticker on ECU could be the giveaway that the ECU has been modded in some way, possibly this affects how it reads or reacts to the cold start sensor value.
@paulwatts905
11 сағат бұрын
👍 well done. oh the lovely v4 sound 👍👍
@mattbetts3885
17 сағат бұрын
Awesome…..learning loads. Cheers
@zweispurmopped
18 сағат бұрын
May I suggest you put a pot and a resistor in series? The fixed resistor with a value to match the low end of the resistance required an the pot with the full-on resistance to take it past the high resistance value? That probably would be the easiest way to cheat the ECU into working.
@yodinator
10 сағат бұрын
More epic wafflage Jim, keep em coming! 😜
@usefulcontent9894
15 сағат бұрын
already got a manual choke might as well add a cold start switch, just want to get it going and not mess up warm running. have a light to remind it is on cold or hot running.
@michaelgemiouk
11 сағат бұрын
Clever boy like your work genius really inspired 😊
@Sgaphotographic
20 сағат бұрын
Just put a two way on(3 pin) switch in, one that's direct for when it's warm and the other with a resistor for when it's cold
@Andrew-p8s2f
18 сағат бұрын
Well done amazing
@ReCheck_WotTheFluck
20 сағат бұрын
Great vids, the waffling is great. It's like doing maths showing the working out aswell. If it is the same water temp sensor that shows temp on gauge, then it must be fine otherwise it wouldn't show correct temp. 👍
@ReCheck_WotTheFluck
20 сағат бұрын
Lee johnston's RC45 is MINT that he's just done a yr ago. Videos are " Riding the classic TT? " and " The news is out!!! " . Better put this one up aswell " Up close. Lee Johnston's Honda RVF750 RC45 race bike. Manx Grand Prix special. "
@SB-vb8ch
18 сағат бұрын
The 5v ref is via a pull up within the ecu, it's a potential divder circuit... Looks like thesensor has gone squiffy (not unusual), you have high resistance through the harness (the fact you have a chopped harness is suspect) or there is something awry with the ecu itself. That would most likely be a dry joint which means the pull up resitance is higher than it should be (like i said before the voltage is what it is measuring rather than resistance). Extra injection PW during cranking is totally normal, you'll have enrichment due to temp but alsodue to very low airspeed during cranking which causes fuel dropout. Some setups actually do a short priming pulse on initial power up too in an attempt to wet the ports before cranking.
@richardtaylor3086
10 сағат бұрын
Way over my head Jim but still enjoyed it 👍
@leavemyrightsalone
21 сағат бұрын
So indepth thinking there... My brain wants to run away.
@SuperbikeSurgeryTV
21 сағат бұрын
😂👍
@darylnicklen3685
20 сағат бұрын
Jim this had you on the hop can you in next video just mention if you left resistor connected or made a cold start switch. It's hard with early electronic systems if you can no longer source good replacement parts. As long as it runs close to spec is the most we can ask some times. Job Well Done.
@danharbun483
19 сағат бұрын
I would think he has left it with that resistor in so the customer doesn't have to mess with it. The take I took form it is that cold start needs about 5000 ohms the full choke is about 3000ohm with then makes his resistor 2000ohms.then when it's warmed up it just needs 2000ohms to run smoothly. Something like that😂😂😂
@Bunter1815
18 сағат бұрын
@@darylnicklen3685 my money would be a cold start switch, I can't see a permanently wired resistor able to simultaneously cope with the coldest start resistive requirement and normal running. If you watch the video the 2.5 k Ohm and 3 k Ohm hot starting is wooly compared to without and that doesn't get the resistance high enough for a cold cold start.
@smiththers2
19 сағат бұрын
I've been thinking of doing this exact thing on my new to me rc46 VFR. It starts pretty hard when cold, but perfect when it's hot. I'm sure it's because of age on either engine or CTS or degrading ECU even.
@martinhjelseth6949
10 сағат бұрын
Love it ! I lern so mutch .
@markbrown-us4xe
19 сағат бұрын
We want the test ride.
@charade993
21 сағат бұрын
Good work! It doesnt make sense why you have to restart to see the change take effect. How on earth does the warm up enrichment work during running? It would just run 'cold' until the next 'hot' restart. As apposed to gradually remove additional fuel until normal temp.
@kepamurray1845
16 сағат бұрын
Yeah, stop waffling Jim. 😂 Been an aircraft mech for a few decades and I know it can be hard to communicate well when you are struggling with complex troubleshooting. A fix is a fix if spares are nonexistent. As long as it is known about by the next bloke trying to figure out what the hell someone else has done in the past and why. Nice one.
@robbie2awesome
12 сағат бұрын
pure genius.
@LasseJOugaard
15 сағат бұрын
What a weird and troublesome problem. Some component must be broken inside the ECU, but that thing is next to impossible to repair when it's potted. I assume another ECU for one of these are complete unobtainium? Here's a thought: If you cannot find another sensor with enough range, you could simply run two coolant temp sensors in series. Find a pipe somewhere with enough space to weld on a boss. Get another coolant sensor just like it and wire them in series. That would give you about 6.000ohms when cold and about 500ohms at running temperature. Should be plenty to get over "the hump" when cold, but low enough to prevent any enrichment when running.
@295walk
19 сағат бұрын
Could it be just the loom or wire (apoligies if mentioned I have viewd the videos but forgotten lol) Keep em coming great stuff.
@xxl531
12 сағат бұрын
Exelent fix 🎉
@motorcyclegarage2307
18 сағат бұрын
This is as good as Ludwig
@smd-tech
12 сағат бұрын
How about 2 coolant sensors in series? Double the signal range.
@alanbrown5593
12 сағат бұрын
Respect
@carlmayer691
17 сағат бұрын
adding a "resistor' to find a solution to your cold start fueling would be akin to doing same to control how bright or dim you want an LED bulb,,, right ??
@eliotmansfield
20 сағат бұрын
would it not be easier to fit a 5k 15 turn pot in series and then adjusting for the sweet spot?
@PF-kr8sh
17 сағат бұрын
I wanna send my bike to you..... from Sweden.
@michaelclowes2043
6 сағат бұрын
Seems perhaps like you need 2 temperature sensors in series. This would give how resistance when hot and high when cold. I might not have understood it right though.
@marksmallman4572
15 сағат бұрын
God, bring back carburetors....
@stephenrichards5386
19 сағат бұрын
A different thermistor ? Might help
@cadmcspeed1418
11 сағат бұрын
Bloody electronics, I used to be able to fix a problem, no chance now
@markmenzies4218
16 сағат бұрын
Would like to have seen the signal voltage. i'm assuming the 5v ref & earth were good.
@SuperbikeSurgeryTV
12 сағат бұрын
Yes, I checked about 50 times! 😩
@wswan81
20 сағат бұрын
The water temp sensor was replaced...wasnt it? Just jokes.😂 But yeah, an alternative may work, its a Honda after all 🤷♂️
@kingkong180280
11 сағат бұрын
Hi amazing work My R1 5pw does the exact same thing.very hard to start when cold.perfect when hot .my opinion it was fuel related before I seen these videos . Did you ever source a temp sensor that would work instead of adding a resistor Cheers Ronnie Glasgow
@stephenrichards5386
19 сағат бұрын
Has someone before you remapped the ECU ?
@dynodom4677
11 сағат бұрын
You DO NOT need to stop the engine each time dude.
@robevans916
8 сағат бұрын
How do you charge for this kind of time? I’m positive you’re eating some of this, and for knowledge that may never prove profitable in the future. We appreciate the knowledge sharing nonetheless! Seeing this makes me think my Ducati 998 is doing something similar.
@johnridley5507
11 сағат бұрын
Fookin ell how do you get your head round tech stuff like that
@lovetoflylovetofly3843
11 сағат бұрын
So is the original temp sensor no good? Or you cannot get the correct one?
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