Fortnine or FortNEIN

[@Critical_Stinking]

Last time I was on the pipe, I woke up in a public toilet with a well known MP towering over me. His flaccid member is etched into my memory forever...

[@nutgone100]

Last time I was on the pipe I lost a month’s wages in a couple of hours 🤣

[@Drainingtheswamp2022]

Diane Abbott??

[@Martin52863]

Sex always feels better when I’ve been drinking Chianti. Is that an Italian tune up?

[@richandiben]

'On the pipe' means something completely different where I come from.

[@NickTaylorRickPowers]

Meth

[@joonya4427]

4:48 That was Marquez saving it - Alex Marquez. Lol

[@cliveadams7629]

I always keep my CBR 600 over 15,000 rpm. It goes quite well.

[@otherpeoplesTriumphs]

Matt genuinely enjoying another human being is rare and sound 😂✌️👍

[@nuppy.9117]

At 13:00 mins in you talk about how your friend says after a few hours the bike feels looser. That applies to him to. His body will be more relaxed than when he first got on. He mind will be more into the ride. I find a 2-4 hour window when I feel great on a bike

[@Vedran.]

My 2020 Z900 after 66.500km is happy in 6th gear @ 3000+ rpm when riding on flat road steady speed (70-75 km/h). No preiginition, no detonations, but, that is cruising speed without demand for fast acceleration. Its what you demmand from your engine. Fast acceleration - downshift and go higher in revs (downshit from 6th to 2nd if needed). 3000rpm is just fine for Z900 in 6th gear (but not much less). Sorry for bad English, not my native language

[@nap8187]

What you said is perfectly coherent my friend

[@jesuschrist7169]

What revs @110km/h ??

[@Vedran.]

@@jesuschrist7169 4600rpm

[@233kosta]

The whole pressure thing... He ought to have added "for the same power output" rather than just assuming that we'd assume that. Then it wouldnhave made more sense.

[@dibnah46]

"if marquez did it" errrr

[@krtong]

checked in the comments for this. lmao

[@233kosta]

I did once nearly do the "rebalance", but my 650 doesn't quite have the chooch factor to try to kill me quite so spectacularly, so it ended up being mainly just a wobble. A really fecking scary wobble!

[@YAMR1M]

OK. I do need to pick you up on one point... Swept volume and carbon deposits... It makes no difference to the amount of air being pulled into the cylinder. If the volume of the cylinder is 100cc and you have 1cc or 10cc worth of carbon on the piston it makes zero difference to the amount of air pulled into the cylinder. This is because it is on the top of the piston sitting in the area of the combustion chamber in a free space. So if you have a 100cc cylinder with a 10cc combustion chamber that 1cc worth of carbon will only reduce the combustion chamber volume at TDC. It will always still pull 100cc of air into the cylinder which is how domed pistons work to increase compression ratios. Now how much carbon build up will we see?? its minimal so it is not going to add any more power. It is sort of self regulating too as carbon builds up then the rough edges of the carbon get hotter and burn off usually anyway so you will see some carbon but in most 4 stroke engines its minimal. OK His assertion that a lower revved engine and a higher revved engine have different carbon build up due how it is used is not correct either, this is all down to fuelling. The piston he showed could have been out of a carburetted bike so they are not as accurately fuelled all the way through the rev range and usually the main jet is the one most care about for wide open throttle as this is when most engines will have problems. Yes the pilot and needle jet will make a difference but it is always at smaller throttle openings so its quite a crude set up with most older bikes. Combustion temps do change depending ( talking about his carburetted crappy single cylinder piston) on how you ride and under acceleration it will get hotter than on a trailing or steady throttle where the fuel needed is much less. The issue with lower RPM riding usually is the throttle control is not as fine as it will be with high RPM riding. So to gain any useful acceleration you will open the throttle more so increasing how much fuel is used to get the acceleration you want. So although the fuel consumption may be less overall at lower RPM the throttle has greater changes to get it to work how you want. This causes momentary periods of rich mixture so can lead to increased carbon build up. Which is why now most fuel injected engines have secondary butterflies which are controlled by the ECU to TRY to keep it as close to optimum as possible regardless of the throttle position YOU are trying to get. Bikes the the ZZR1400 are known to only give 50% actual throttle in the first 1 or 2 gears via the secondary butterflies. ( a safety thing in this case but you get the point, the twist grip is a aspirational movement but the ECU decides what it really wants you to have). Not like the good old days of carburettors and bikes stumbling if you opened the throttle too hard too fast or just feeling fluffy and not very crisp due to if it was way too rich or lean on the needle jets.. BUT the main point he is trying to get across is not a bad one, its just very badly done..

[@ballockybill2277]

Hey !! Don't dis the CG ! I have one of the last ones , with the electric start . Gets me around on a whiff of petrol and has never missed a beat !! Pfft , crappy indeed !

[@kawi704racing]

8:46 6th gear @ 2000rpm is off throttle on the engine brake .

[@ksw8934]

if thats skill then my mom is the best racer in the universe. this is what happened: when we where out on the track as a family racing around years ago. my mom was just waiting to enter the track, and i saw her chain fell of the rear sprocket, so i wanted to tap her shoulder to tell her, but what happened is she thought i wanted to wish her luck right before she want to pull away, so she nots, puts the bike in first gear, released the clutch, chain start spinning and clanged on the rear sprocket and drove the bike to the start line to do the race and finished the race like nothing happened, i couldnt believe my eyes when i saw the chain snap on that sprocket, i looked around if other people saw it to, luckily my dad and some other saw it because i was really doubting my self for a few seconds. i told her afterwards what she did, and she thought i was joking. i never saw that happen again of all these years racing motorbikes....

[@UnCivilEngineerIRL]

So low rpm = carbon buildup and higher pressure This in turn causes holes to be blown through the crown of your piston. Why then are you showing us an immaculate piston with a hole in it ... surely it should be all carbon'ed up. More BS

[@1Beetlegeuse]

Traction control can manage engine output in both acceleration and deceleration. Not sure about OEM's or how much its implemented on those but in combination with electronic throttle you can manage wheel hop and do away with a slipper clutch. It simply manages the back torque from the rear wheel by adjusting throttle openings to the point you could have almost zero engine braking if you want.

[@electric_boogaloo496]

One of the main use cases of a mechanical slipper is that you don't overrev the engine when you bang down multiple gears braking for turn 1 at the track. It protects your valves from making contact with the pistons from valve float due to overrevving. Electronic engine braking control can't do that.

[@bananabrooks3836]

I thought Matt might critique F9s Engine configuration video.

[@LandyVlad_Rides]

I was half expecting a discussion on it. Its subjective as to what people prefer though. We all know transverse V-Twins is where it's at :D There is some fault with my GSX1400 as there seems to be 4 cylinders all in a line...

[@johnwills9303]

Had no idea what he meant. An odd way to describe the compression ratio

[@walterverheyen1263]

I have a cb 1100. I ride it trough the rev range. No problem. Then I have a honda nc 750 dct version. When I ride that thing in standard D mode, it shifts automatically at really low rpm. It is strange and I don't understand it. Is it all so important then? I wonder.

[@233kosta]

I mean if I'm not loading the engine I'll keep to 3-4k, but as soon as the nationals comes into view it's down two gears 😉

[@larsjrgensen5975]

The Scot from Haltech comment is more about car engines with turbo and not bikes. It is about the forces in the engine and transmission, demanding the same amount of engine power at 3000 RPM needs roughly twice as much boom compared to the same engine power output at 6000 RPM. With a turbo it is possible to run higher peak cylinder pressure at 3000RPM then at 7000RPM depending on turbo and engine size. My car is torque limited below 3000RPM to prevent damage to the gearbox and clutch.

[@thefugitivemind6193]

in that combustion demo (31.10) the spark plug is drawn upsidedown

[@davidkavanagh4966]

My Honda 750 dct lives at 2k rpm, engine lugs when you open the throttle. It's redline is 7km

[@jozefrockatansky1588]

I was given one of these by the insurance whilst my bike was written off (not my fault). Was kinda glad as i'd always wanted to try one, very different to what I'm used to be but the NC750 seemed to love the low down revs and seemed rougher further up. Handled nicely though and was an odd feeling, felt high up and able to see everything clearly, but all the weight is low down too. Interesting bike.

[@Fizzer99]

20:27 a few years ago a gen 1 hayabusa came in with a misfire. I pulled an intake valve that had the same damage. Nothing else was damaged. Still don't know what caused it though. Maybe a small rock or something got inside the intake and went through the motor.

[@johnnybravo9087]

Re the Italian tune up talk: My mate who drives like a sissy gave me a go of his sports car with him in the passenger seat. He said “wow it feels to be going a lot faster from the passenger seat”. No chap, it’s because I’m driving faster than you normally do.

[@dirtygarageguy]

Thats is also true though. If you're not controlling the car it feels faster. It happens when my misses drove the same route and then I drive it. I even checked the speedo around said route and she was just the same speed as me.

[@mattkemp1902]

@@dirtygarageguy Cruise control does this too - in a scenario where you might ease off the throttle without thinking about it (traffic bunching up ahead) it feels to me almost like the bike is surging forwards

[@chrisdavidson911]

33:54 100,000 rpm? lol Bike feeling better after a couple of hours riding; my 1st thought was "of course it does, the fuel tank's empty!" Italian tune ups; the 2016 VFR i used to have hated being a town bike, if it didn't get a decent run out for a few weeks it needed more cranking for a cold start and was lumpy at lower rpm. The CB1000 didn't care, that was always just happy being out of the house. The piston pictures; i originally thought they were the same piston in the same engine, taken with a boroscope camera, and cropped to remove the things that aren't a piston. That with the bicycle and piston pressure, seemed like he'd gone a questionable way about trying to explain the difference between 100% throttle in 4th gear vs 20% throttle in 3rd giving you the same speed up a hill

[@IANPARRr]

If your getting carbon build up on a 2 stroke motorcycle ur mixture is wrong or your using very poor quality oil. The biggest cause of carbon build up is direct injection but that's mostly cars and diesel engines. Diesel nowadays to combat emissions have egr valves which they take a certain amount of exhaust gasses and return them to the intake, and this causes a lot of build carbon build up.

[@DarkInovator]

oh you cheeky bastard :) you got me on the thumbnail

[@TestTest-pf9qp]

Common, have some fun, quit the hate, enjoy the ride, it is massively obvious that the full fortnine video is a parody relying heavily on humor and second degré. Also after all these videos, could you please buy a proper mic and articulate a little more ?

[@kostikpostik]

Honda NC idle at 1200 RPM, red zone starts at 6400. Seems it will be always on low rpm and will ruin the engine.

[@luddite6239]

The Honda NC isn't your typical bike engine. It is considerably undersquare with a 73mm bore and 80mm stroke. The story being bandied about at its launch was that it was half a Honda Jazz car engine. Probably not actually true BUT it was designed in collaboration with Honda's car engineers, which was a first. So the engine is in fact designed to be ridden more like you'd drive a car.

[@malcolmdown9170]

Ironically the comment I made about this video was that the spark plug was upside down.

[@progste]

I don't like how he jumped straight to talk about traction control, seems like something he should discuss maybe at the very end...

[@robw3655]

He looks like a gurning world champion at 2:30

[@clumsycol7824]

The extra point I took from this video - KZbin recommends your own videos to you.

[@iliketurtles4463]

Probably says more about him than youtube...

[@danvorobiov]

The "upside down spark plug" joke was very good. You should give them credit for that 😂

[@alexboyde8129]

The gurning shot @ 16.30 is killing me. Is Dave dead yet?

[@gcbification]

...put this mooser on a Honda CR500, and see if he's still hanging on when it's "on the pipe" @ 6000rpm ...hint: google 'honda CR500 horsepower' and check the images ... absolute weapon to ride, but you'd rarely rev it past 7000rpm... you had no choice ; it wouldn't pull the skin off a custard under 3000rpm... ...70's 2strokes ...(this 'italian tune up' zing was never focused on 2strokes or bikes)....most all of them had 2stroke oil pumps (not pre-mix), and if you lugged it around town the unburnt oil would sit in the crankcases and end up getting stuck in the (wire-wool wrapped fluted) baffles, and if you didn't regularly 'rev it out' to blow this excess oil out (creating a huge pall of blue smoke behind you in the process), you could/would end up fouling spark-plugs and/or clogging your pipes (silencers)... ...with the GT550 mill, suzuki had this fancy SRIS setup ('Suzuki Recycle Injection System') with plastic pipes and check valves to pump this crankcase oil into the adjacent cylinder transfer port. Pita when it came to porting the barrels and maximizing per pot power, so it was quickly removed ; consequence was it was fairly prone to puddles in the crankcase... especially so when the oil-pump was dialed up a bit to cope with engine output..usually took 2 or 3 gears to clear it out .... (we won't talk about fuel puddles in the crankcases when racing.. THAT was all sorts of evil)... Like Matt said, 'on the pipe' means having the engine spinning within the tuned range of resonance defined by the expansion chamber (pipe)....and this is largely 2stroke stuff less so 4stroke, and he shouldn't be mixing examples like he does...unless he's on the crack pipe? =) I recall way way back, learning to ride in a lower gear than was really required when riding around city/town areas, just because A. offered greater immediate engine braking, and B. greater acceleration curve....these are handy tools to help keep you out of bother from the next dingbat in a car who {ahem} "didn't see you" and tries to run you down.

[@philthejet]

David Suzuki has nothing to do with the motorcycles, he is a well known public Canadian figure and an environmentalist.

[@LandyVlad_Rides]

Yeah that's the joke.

[@philthejet]

@@LandyVlad_Rides I said it because Matt probably didn't know.

[@LandyVlad_Rides]

@@philthejet ah gotcha

[@prdoohan]

5:05 So what you are saying is that this IS skill then?...

[@Shinysideup]

It is a Marquez just not the really good one. But definitely agree more luck than skill.

[@madmike2471]

Just ride how you like who cares at the end of the day 🙂👍

[@5tevenH]

Think you're taken everything literally matt....

[@dirtygarageguy]

like what? Am I meant to take this all as a joke, and if so, which bits are the jokes and which bits are literal?

[@5tevenH]

@dirtygarageguy well no obviously, but you ripped him to pieces when he mentioned the carbon build up eats away at your compression ratio. I firmly understood what he was getting at. Yet I am literally literal because special 😉

[@AntiGooseAction]

What is different in a boat engine (that is designed to run at WOT for hours) Vs a bike or car engine? Also are there dangers associated with lugging a diesel?

[@jediknight1294]

The way they build stuff is different, the weight of certain components will change and what they focus on as the thing they consider most important like the cooling system will prioritise different things

[@salathe]

Could you do fortnines video on cards vs injection?

[@MrMichaelfalk]

got a 660 ccm2 1 cylinder. High rpm does not exist..

[@kawi704racing]

5:27 that is Marquez. Alex Marquez.

[@11metalfan]

Be wary of fort, night

[@filiplaskovski9993]

Man just enjoy the content what’s with people nitpicking ffs

[@11metalfan]

@@filiplaskovski9993 horse but ahead, try thrusting

[@vfrtom9669]

​@@filiplaskovski9993yeah imagine making a channel just to nitpick others this channel is shite 😂

[@cicotic6885]

🍕

[@peterjordan7324]

I agree in what you say matt , Fortnine gives a lot of misleading information ,but in his defense i will agree modern motorcycle engines need to be red lined now and again if they have hydraulic cam chain tensioners to increase the oil pressure to max and adjust slack in the chain.

[@gafrers]

Another great video analysis, report. 👍 The upside down plug 🤣

[@two6520]

Hi Mr. Matt

[@ANDYblacks13]

OCD triggered by the upside down spark plug,one person did the diagram then this jolly fellow uses it (or did he do it? ), then I got to the pre ign is the same a det! Well right there you tell us you need to look into them 2 topics a lot more and redo that part of the vid mate, a little knowledge can be a dangerous thing, to then do a vid and state that is very silly

[@LexGrossmansDog]

Its nit OCD to call out BS. Ryan F9 produces nice vids, but he speaks to the basic idiot rider who cant lube their chain. So, the morons see his vids like he is a genius. He may be, but his ICE knowledge is mid.

[@nigelsenchez]

How can you be a motorcycle enthusiast channel and no one noticed the spark plug upside-down?

[@233kosta]

So glad this dude gets air time!

[@goinhot9133]

Matt, you’re spoiling us

[@krishampton7060]

another nice response video 👍🏻

[@ballockybill2277]

This bloke in the vid is a "know all " . I don't think he's as clever as he thinks he is .

[@2stroke438]

His face bothers me

[@OhJeebers]

So Ryan says run your engine at its sweet point, you say the same thing, what is your point?

[@cliveadams7629]

He started so he'll finish.

[@OhJeebers]

Your nit picking, at the end of the day the point is lugging an engine is bad and running an engine at proper revs is good. Ryan is right generally speaking. And he is speaking generally, it’s a YT vid not a physics tutorial.

[@11metalfan]

"Generally" is nails on a chalkboard to an engineer

[@11metalfan]

That's why they're such a pain in the arse to deal with lol

[@filiplaskovski9993]

@@11metalfanit’s ridiculous people need to just enjoy the content fortnine is a decent channel

[@dgphi]

-Your nit picking- You're nitpicking

[@shaunappleton5153]

@@dgphi that's so funny - nice won 🙂

[@allanhughes7859]

First !!!!!!!!!!!!!!!!!!!!!! And I also like Fortnine so glad you approve also !!!

[@nigelsenchez]

Sometimes you lug sometimes you on the pipe. There is no wrong or right RPM.